[PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Mauro Carvalho Chehab]

Hi Jon,

It is impressive how a single patch became a series with 25 ones ;-)

This version was rebased on next-20260127, which is after docs-mw
got merged with my doc patches, solving some merge conflicts.

It should now apply cleanly on the top of upstream and it will address
the kernel-doc issues with context analysis patches that are already
at linux-next.

On this version, I opted to do something I always wanted when
porting from the venerable kernel-doc perl logic: properly handle
macros without writing really complex regular expressions.

After those changes, the replacement logic becomes a lot more
easier to write, as we can have a cleaner logic to handle
function calls:

	function_xforms = [
	    (KernRe(r"^static +"), ""),
	    (KernRe(r"^extern +"), ""),
	...
	    (NestedMatch(r"__cond_acquires\s*\("), ""),
	    (NestedMatch(r"__cond_releases\s*\("), ""),
	...
	}

It can even be used to replace comma-separated arguments like here:

	struct_xforms = [
	...
	    (NestedMatch(r'\bstruct_group\s*\('), r'\2'),
	    (NestedMatch(r'\bstruct_group_attr\s*\('), r'\3'),
	    (NestedMatch(r'\bstruct_group_tagged\s*\('), r'struct \1 { \3 } \2;'),
	    (NestedMatch(r'\b__struct_group\s*\('), r'\4'),
	...
	]

As both KernRe and NestedMatch have sub methods, they can be placed
altogether at the same transforms tables.

The regex syntax for them are quite simple: they should end with a
delimiter (usually open parenthesis, but brackets and square
brackets are also supported).

The first 15 patches on this series were co-developed with Randy,
with came up with the original patch. I ended helping identifying
kernel-doc issues and doing some changes to make the parser more
reliable.

Then, I added 10 other patches to improve NestedMatch.

The final two patches on it fixes an issue when parsing
include/net/page_pool/types.h. Right now, it doesn't parse
well struct page_pool_params, as the second struct_group_tagged()
has a /* private */ on it, causing the end parenthesis to be
commented out. After the series, the documentation for it
should be ok.

-

Even NestedMatch being more complex than KernRe, on my machine,
parsing all files is 5% faster than before, because we're not
parsing anymore macro definitions.

Ah, due to the complexity of NestedMatch, I opted to write
some unit tests to verify that the logic there is correct.
We can use it to add other border cases.

Using it is as easy as running:

	$ tools/unittests/nested_match.py

(I opted to create a separate directory for it, as this
is not really documentation)

Mauro Carvalho Chehab (23):
  docs: kdoc_re: add support for groups()
  docs: kdoc_re: don't go past the end of a line
  docs: kdoc_parser: move var transformers to the beginning
  docs: kdoc_parser: don't mangle with function defines
  docs: kdoc_parser: add functions support for NestedMatch
  docs: kdoc_parser: use NestedMatch to handle __attribute__ on
    functions
  docs: kdoc_parser: fix variable regexes to work with size_t
  docs: kdoc_parser: fix the default_value logic for variables
  docs: kdoc_parser: add some debug for variable parsing
  docs: kdoc_parser: don't exclude defaults from prototype
  docs: kdoc_parser: fix parser to support multi-word types
  docs: kdoc_parser: add support for LIST_HEAD
  docs: kdoc_re: properly handle strings and escape chars on it
  docs: kdoc_re: better show KernRe() at documentation
  docs: kdoc_re: don't recompile NextMatch regex every time
  docs: kdoc_re: Change NestedMath args replacement to \0
  docs: kdoc_re: make NextedMatch use KernRe
  tools: kdoc_re: add support on NestedMatch for argument replacement
  tools: python: add helpers to run unit tests
  unittests: add tests for NestedMatch class
  tools/lib/python/unittest_helper.py
  docs: kdoc_parser: better handle struct_group macros
  docs: kdoc_re: fix a parse bug on struct page_pool_params

Randy Dunlap (2):
  docs: kdoc_parser: ignore context analysis and lock attributes
  kdoc_parser: handle struct member macro VIRTIO_DECLARE_FEATURES(name)

 tools/lib/python/kdoc/kdoc_parser.py | 109 +++--
 tools/lib/python/kdoc/kdoc_re.py     | 154 +++++--
 tools/lib/python/unittest_helper.py  | 279 +++++++++++++
 tools/unittests/nested_match.py      | 589 +++++++++++++++++++++++++++
 4 files changed, 1063 insertions(+), 68 deletions(-)
 create mode 100755 tools/lib/python/unittest_helper.py
 create mode 100755 tools/unittests/nested_match.py

-- 
2.52.0

[PATCH v2 01/25] docs: kdoc_re: add support for groups()

[Mauro Carvalho Chehab]

Add an equivalent to re groups() method.
This is useful on debug messages.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 2816bd9f90f8..19e777e2c97e 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -106,6 +106,13 @@ class KernRe:
 
         return self.last_match.group(num)
 
+    def groups(self):
+        """
+        Returns the group results of the last match
+        """
+
+        return self.last_match.groups()
+
 
 class NestedMatch:
     """
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 01/25] docs: kdoc_re: add support for groups()

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 01/25] docs: kdoc_re: add support
> for groups()
> 
> Add an equivalent to re groups() method.
> This is useful on debug messages.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index 2816bd9f90f8..19e777e2c97e 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -106,6 +106,13 @@ class KernRe:
> 
>          return self.last_match.group(num)
> 
> +    def groups(self):
> +        """
> +        Returns the group results of the last match
> +        """
> +
> +        return self.last_match.groups()
> +
> 
>  class NestedMatch:
>      """
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 02/25] docs: kdoc_re: don't go past the end of a line

[Mauro Carvalho Chehab]

The logic which checks if the line ends with ";" is currently
broken: it may try to read past the buffer.

Fix it by checking before trying to access line[pos].

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 19e777e2c97e..a0402c065d3a 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -265,7 +265,7 @@ class NestedMatch:
             out += new_sub
 
             # Drop end ';' if any
-            if line[pos] == ';':
+            if pos < len(line) and line[pos] == ';':
                 pos += 1
 
             cur_pos = pos
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 02/25] docs: kdoc_re: don't go past the end of a line

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 02/25] docs: kdoc_re: don't go
> past the end of a line
> 
> The logic which checks if the line ends with ";" is currently
> broken: it may try to read past the buffer.
> 
> Fix it by checking before trying to access line[pos].
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index 19e777e2c97e..a0402c065d3a 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -265,7 +265,7 @@ class NestedMatch:
>              out += new_sub
> 
>              # Drop end ';' if any
> -            if line[pos] == ';':
> +            if pos < len(line) and line[pos] == ';':
>                  pos += 1
> 
>              cur_pos = pos
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 03/25] docs: kdoc_parser: move var transformers to the beginning

[Mauro Carvalho Chehab]

Just like functions and structs had their transform variables
placed at the beginning, move variable transforms to there
as well.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 23 +++++++++++++----------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index fd57944ae907..0b68b140cd02 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -191,6 +191,18 @@ function_xforms  = [
     (KernRe(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+"), ""),
 ]
 
+#
+# Transforms for variable prototypes
+#
+var_xforms = [
+    (KernRe(r"__read_mostly"), ""),
+    (KernRe(r"__ro_after_init"), ""),
+    (KernRe(r"(?://.*)$"), ""),
+    (KernRe(r"(?:/\*.*\*/)"), ""),
+    (KernRe(r";$"), ""),
+    (KernRe(r"=.*"), ""),
+]
+
 #
 # Ancillary functions
 #
@@ -971,15 +983,6 @@ class KernelDoc:
         ]
         OPTIONAL_VAR_ATTR = "^(?:" + "|".join(VAR_ATTRIBS) + ")?"
 
-        sub_prefixes = [
-            (KernRe(r"__read_mostly"), ""),
-            (KernRe(r"__ro_after_init"), ""),
-            (KernRe(r"(?://.*)$"), ""),
-            (KernRe(r"(?:/\*.*\*/)"), ""),
-            (KernRe(r";$"), ""),
-            (KernRe(r"=.*"), ""),
-        ]
-
         #
         # Store the full prototype before modifying it
         #
@@ -1003,7 +1006,7 @@ class KernelDoc:
         # Drop comments and macros to have a pure C prototype
         #
         if not declaration_name:
-            for r, sub in sub_prefixes:
+            for r, sub in var_xforms:
                 proto = r.sub(sub, proto)
 
         proto = proto.rstrip()
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 03/25] docs: kdoc_parser: move var transformers to the beginning

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 03/25] docs: kdoc_parser: move
> var transformers to the beginning
> 
> Just like functions and structs had their transform variables placed
> at the beginning, move variable transforms to there as well.
> 
> No functional changes.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 23 +++++++++++++----------
>  1 file changed, 13 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index fd57944ae907..0b68b140cd02 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -191,6 +191,18 @@ function_xforms  = [
> 
> (KernRe(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+")
> , ""),  ]
> 
> +#
> +# Transforms for variable prototypes
> +#
> +var_xforms = [
> +    (KernRe(r"__read_mostly"), ""),
> +    (KernRe(r"__ro_after_init"), ""),
> +    (KernRe(r"(?://.*)$"), ""),
> +    (KernRe(r"(?:/\*.*\*/)"), ""),
> +    (KernRe(r";$"), ""),
> +    (KernRe(r"=.*"), ""),
> +]
> +
>  #
>  # Ancillary functions
>  #
> @@ -971,15 +983,6 @@ class KernelDoc:
>          ]
>          OPTIONAL_VAR_ATTR = "^(?:" + "|".join(VAR_ATTRIBS) + ")?"
> 
> -        sub_prefixes = [
> -            (KernRe(r"__read_mostly"), ""),
> -            (KernRe(r"__ro_after_init"), ""),
> -            (KernRe(r"(?://.*)$"), ""),
> -            (KernRe(r"(?:/\*.*\*/)"), ""),
> -            (KernRe(r";$"), ""),
> -            (KernRe(r"=.*"), ""),
> -        ]
> -
>          #
>          # Store the full prototype before modifying it
>          #
> @@ -1003,7 +1006,7 @@ class KernelDoc:
>          # Drop comments and macros to have a pure C prototype
>          #
>          if not declaration_name:
> -            for r, sub in sub_prefixes:
> +            for r, sub in var_xforms:
>                  proto = r.sub(sub, proto)
> 
>          proto = proto.rstrip()
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 04/25] docs: kdoc_parser: don't mangle with function defines

[Mauro Carvalho Chehab]

Mangling with #defines is not nice, as we may end removing
the macro names, preventing several macros from being properly
documented.

Also, on defines, we have something like:

	#define foo(a1, a2, a3, ...)			 \
		/* some real implementation */

The prototype part (first line on this example) won't contain
any macros, so no need to apply any regexes on it.

With that, move the apply_transforms() logic to ensure that
it will be called only on functions.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 0b68b140cd02..3ba2cda2487a 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -163,7 +163,7 @@ struct_nested_prefixes = [
 #
 # Transforms for function prototypes
 #
-function_xforms  = [
+function_xforms = [
     (KernRe(r"^static +"), ""),
     (KernRe(r"^extern +"), ""),
     (KernRe(r"^asmlinkage +"), ""),
@@ -1065,10 +1065,7 @@ class KernelDoc:
         found = func_macro = False
         return_type = ''
         decl_type = 'function'
-        #
-        # Apply the initial transformations.
-        #
-        prototype = apply_transforms(function_xforms, prototype)
+
         #
         # If we have a macro, remove the "#define" at the front.
         #
@@ -1087,6 +1084,11 @@ class KernelDoc:
                 declaration_name = r.group(1)
                 func_macro = True
                 found = True
+        else:
+            #
+            # Apply the initial transformations.
+            #
+            prototype = apply_transforms(function_xforms, prototype)
 
         # Yes, this truly is vile.  We are looking for:
         # 1. Return type (may be nothing if we're looking at a macro)
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 04/25] docs: kdoc_parser: don't mangle with function defines

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 04/25] docs: kdoc_parser: don't
> mangle with function defines
> 
> Mangling with #defines is not nice, as we may end removing the macro
> names, preventing several macros from being properly documented.
> 
> Also, on defines, we have something like:
> 
> 	#define foo(a1, a2, a3, ...)			 \
> 		/* some real implementation */
> 
> The prototype part (first line on this example) won't contain any
> macros, so no need to apply any regexes on it.
> 
> With that, move the apply_transforms() logic to ensure that it will be
> called only on functions.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 12 +++++++-----
>  1 file changed, 7 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 0b68b140cd02..3ba2cda2487a 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -163,7 +163,7 @@ struct_nested_prefixes = [  #  # Transforms for
> function prototypes  # -function_xforms  = [
> +function_xforms = [
>      (KernRe(r"^static +"), ""),
>      (KernRe(r"^extern +"), ""),
>      (KernRe(r"^asmlinkage +"), ""),
> @@ -1065,10 +1065,7 @@ class KernelDoc:
>          found = func_macro = False
>          return_type = ''
>          decl_type = 'function'
> -        #
> -        # Apply the initial transformations.
> -        #
> -        prototype = apply_transforms(function_xforms, prototype)
> +
>          #
>          # If we have a macro, remove the "#define" at the front.
>          #
> @@ -1087,6 +1084,11 @@ class KernelDoc:
>                  declaration_name = r.group(1)
>                  func_macro = True
>                  found = True
> +        else:
> +            #
> +            # Apply the initial transformations.
> +            #
> +            prototype = apply_transforms(function_xforms, prototype)
> 
>          # Yes, this truly is vile.  We are looking for:
>          # 1. Return type (may be nothing if we're looking at a macro)
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 05/25] docs: kdoc_parser: add functions support for NestedMatch

[Mauro Carvalho Chehab]

Some annotations macros may have nested parenthesis, causing normal
regex parsing to fail.

Extend apply_transforms to also use NestedMatch and add support
for nested functions.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 38 ++++++++++++++++++----------
 1 file changed, 25 insertions(+), 13 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 3ba2cda2487a..ae5b2ef80f75 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -152,7 +152,7 @@ struct_xforms = [
     (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern + r'\)', re.S), r'__u32 \1'),
 ]
 #
-# Regexes here are guaranteed to have the end delimiter matching
+# Struct regexes here are guaranteed to have the end delimiter matching
 # the start delimiter. Yet, right now, only one replace group
 # is allowed.
 #
@@ -160,6 +160,13 @@ struct_nested_prefixes = [
     (re.compile(r'\bSTRUCT_GROUP\('), r'\1'),
 ]
 
+#
+# Function Regexes here are guaranteed to have the end delimiter matching
+# the start delimiter.
+#
+function_nested_prefixes = [
+]
+
 #
 # Transforms for function prototypes
 #
@@ -207,13 +214,6 @@ var_xforms = [
 # Ancillary functions
 #
 
-def apply_transforms(xforms, text):
-    """
-    Apply a set of transforms to a block of text.
-    """
-    for search, subst in xforms:
-        text = search.sub(subst, text)
-    return text
 
 multi_space = KernRe(r'\s\s+')
 def trim_whitespace(s):
@@ -408,6 +408,8 @@ class KernelDoc:
         # Place all potential outputs into an array
         self.entries = []
 
+        self.nested = NestedMatch()
+
         #
         # We need Python 3.7 for its "dicts remember the insertion
         # order" guarantee
@@ -505,6 +507,16 @@ class KernelDoc:
         # State flags
         self.state = state.NORMAL
 
+    def apply_transforms(self, regex_xforms, nested_xforms, text):
+        """Apply a set of transforms to a block of text."""
+        for search, subst in regex_xforms:
+            text = search.sub(subst, text)
+
+        for search, sub in nested_xforms:
+            text = self.nested.sub(search, sub, text)
+
+        return text.strip()
+
     def push_parameter(self, ln, decl_type, param, dtype,
                        org_arg, declaration_name):
         """
@@ -881,11 +893,9 @@ class KernelDoc:
         # Go through the list of members applying all of our transformations.
         #
         members = trim_private_members(members)
-        members = apply_transforms(struct_xforms, members)
+        members = self.apply_transforms(struct_xforms, struct_nested_prefixes,
+                                        members)
 
-        nested = NestedMatch()
-        for search, sub in struct_nested_prefixes:
-            members = nested.sub(search, sub, members)
         #
         # Deal with embedded struct and union members, and drop enums entirely.
         #
@@ -1088,7 +1098,9 @@ class KernelDoc:
             #
             # Apply the initial transformations.
             #
-            prototype = apply_transforms(function_xforms, prototype)
+            prototype = self.apply_transforms(function_xforms,
+                                              function_nested_prefixes,
+                                              prototype)
 
         # Yes, this truly is vile.  We are looking for:
         # 1. Return type (may be nothing if we're looking at a macro)
-- 
2.52.0

[PATCH v2 06/25] docs: kdoc_parser: use NestedMatch to handle __attribute__ on functions

[Mauro Carvalho Chehab]

Some annotations macros may have nested parenthesis, causing normal
regex parsing to fail. The __attribute__ regex is currently very
complex to try to avoid that, but it doesn't catch all cases.

Ensure that the parenthesis will be properly handled by using
the NestedMatch() logic.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index ae5b2ef80f75..64165d8df84e 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -165,6 +165,7 @@ struct_nested_prefixes = [
 # the start delimiter.
 #
 function_nested_prefixes = [
+    (re.compile(r"__attribute__\s*\("), ""),
 ]
 
 #
@@ -195,7 +196,6 @@ function_xforms = [
     (KernRe(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +"), ""),
     (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"), r"\1, \2"),
     (KernRe(r"__attribute_const__ +"), ""),
-    (KernRe(r"__attribute__\s*\(\((?:[\w\s]+(?:\([^)]*\))?\s*,?)+\)\)\s+"), ""),
 ]
 
 #
-- 
2.52.0

[PATCH v2 07/25] docs: kdoc_parser: fix variable regexes to work with size_t

[Mauro Carvalho Chehab]

The regular expressions meant to pick variable types are too
naive: they forgot that the type word may contain underlines.

Co-developed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 64165d8df84e..201c4f7298d7 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -1027,14 +1027,14 @@ class KernelDoc:
 
         default_val = None
 
-        r= KernRe(OPTIONAL_VAR_ATTR + r"\w.*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
+        r= KernRe(OPTIONAL_VAR_ATTR + r"[\w_]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
         if r.match(proto):
             if not declaration_name:
                 declaration_name = r.group(1)
 
             default_val = r.group(2)
         else:
-            r= KernRe(OPTIONAL_VAR_ATTR + r"(?:\w.*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
+            r= KernRe(OPTIONAL_VAR_ATTR + r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
         if r.match(proto):
             default_val = r.group(1)
 
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 07/25] docs: kdoc_parser: fix variable regexes to work with size_t

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 07/25] docs: kdoc_parser: fix
> variable regexes to work with size_t
> 
> The regular expressions meant to pick variable types are too
> naive: they forgot that the type word may contain underlines.
> 
> Co-developed-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 64165d8df84e..201c4f7298d7 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -1027,14 +1027,14 @@ class KernelDoc:
> 
>          default_val = None
> 
> -        r= KernRe(OPTIONAL_VAR_ATTR +
> r"\w.*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> +        r= KernRe(OPTIONAL_VAR_ATTR +
> r"[\w_]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
>          if r.match(proto):
>              if not declaration_name:
>                  declaration_name = r.group(1)
> 
>              default_val = r.group(2)
>          else:
> -            r= KernRe(OPTIONAL_VAR_ATTR +
> r"(?:\w.*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> +            r= KernRe(OPTIONAL_VAR_ATTR +
> r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
>          if r.match(proto):
>              default_val = r.group(1)
> 
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 08/25] docs: kdoc_parser: fix the default_value logic for variables

[Mauro Carvalho Chehab]

The indentation is wrong for the second regex, which causes
problems on variables with defaults.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 201c4f7298d7..cbfdaba39494 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -1035,9 +1035,9 @@ class KernelDoc:
             default_val = r.group(2)
         else:
             r= KernRe(OPTIONAL_VAR_ATTR + r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
-        if r.match(proto):
-            default_val = r.group(1)
 
+            if r.match(proto):
+                default_val = r.group(1)
         if not declaration_name:
            self.emit_msg(ln,f"{proto}: can't parse variable")
            return
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 08/25] docs: kdoc_parser: fix the default_value logic for variables

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 08/25] docs: kdoc_parser: fix the
> default_value logic for variables
> 
> The indentation is wrong for the second regex, which causes problems
> on variables with defaults.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 201c4f7298d7..cbfdaba39494 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -1035,9 +1035,9 @@ class KernelDoc:
>              default_val = r.group(2)
>          else:
>              r= KernRe(OPTIONAL_VAR_ATTR +
> r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> -        if r.match(proto):
> -            default_val = r.group(1)
> 
> +            if r.match(proto):
> +                default_val = r.group(1)
>          if not declaration_name:
>             self.emit_msg(ln,f"{proto}: can't parse variable")
>             return
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 09/25] docs: kdoc_parser: add some debug for variable parsing

[Mauro Carvalho Chehab]

This is a new parser that we're still fine-tuning. Add some
extra debug messages to help addressing issues over there.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index cbfdaba39494..ccee4e0bcaab 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -1033,11 +1033,19 @@ class KernelDoc:
                 declaration_name = r.group(1)
 
             default_val = r.group(2)
+
+            self.config.log.debug("Variable proto parser: %s from '%s'",
+                                  r.groups(), proto)
+
         else:
             r= KernRe(OPTIONAL_VAR_ATTR + r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
 
             if r.match(proto):
                 default_val = r.group(1)
+
+        if default_val:
+            self.config.log.debug("default: '%s'", default_val)
+
         if not declaration_name:
            self.emit_msg(ln,f"{proto}: can't parse variable")
            return
@@ -1045,6 +1053,9 @@ class KernelDoc:
         if default_val:
             default_val = default_val.lstrip("=").strip()
 
+        self.config.log.debug("'%s' variable prototype: '%s', default: %s",
+                              declaration_name, proto, default_val)
+
         self.output_declaration("var", declaration_name,
                                 full_proto=full_proto,
                                 default_val=default_val,
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 09/25] docs: kdoc_parser: add some debug for variable parsing

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 09/25] docs: kdoc_parser: add
> some debug for variable parsing
> 
> This is a new parser that we're still fine-tuning. Add some extra
> debug messages to help addressing issues over there.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index cbfdaba39494..ccee4e0bcaab 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -1033,11 +1033,19 @@ class KernelDoc:
>                  declaration_name = r.group(1)
> 
>              default_val = r.group(2)
> +
> +            self.config.log.debug("Variable proto parser: %s from
> '%s'",
> +                                  r.groups(), proto)
> +
>          else:
>              r= KernRe(OPTIONAL_VAR_ATTR +
> r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> 
>              if r.match(proto):
>                  default_val = r.group(1)
> +
> +        if default_val:
> +            self.config.log.debug("default: '%s'", default_val)
> +
>          if not declaration_name:
>             self.emit_msg(ln,f"{proto}: can't parse variable")
>             return
> @@ -1045,6 +1053,9 @@ class KernelDoc:
>          if default_val:
>              default_val = default_val.lstrip("=").strip()
> 
> +        self.config.log.debug("'%s' variable prototype: '%s',
> default: %s",
> +                              declaration_name, proto, default_val)
> +
>          self.output_declaration("var", declaration_name,
>                                  full_proto=full_proto,
>                                  default_val=default_val,
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 10/25] docs: kdoc_parser: don't exclude defaults from prototype

[Mauro Carvalho Chehab]

If we do that, the defaults won't be parsed.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index ccee4e0bcaab..0b6cba442d72 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -207,7 +207,6 @@ var_xforms = [
     (KernRe(r"(?://.*)$"), ""),
     (KernRe(r"(?:/\*.*\*/)"), ""),
     (KernRe(r";$"), ""),
-    (KernRe(r"=.*"), ""),
 ]
 
 #
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 10/25] docs: kdoc_parser: don't exclude defaults from prototype

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 10/25] docs: kdoc_parser: don't
> exclude defaults from prototype
> 
> If we do that, the defaults won't be parsed.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index ccee4e0bcaab..0b6cba442d72 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -207,7 +207,6 @@ var_xforms = [
>      (KernRe(r"(?://.*)$"), ""),
>      (KernRe(r"(?:/\*.*\*/)"), ""),
>      (KernRe(r";$"), ""),
> -    (KernRe(r"=.*"), ""),
>  ]
> 
>  #
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 11/25] docs: kdoc_parser: fix parser to support multi-word types

[Mauro Carvalho Chehab]

The regular expression currently expects a single word for the
type, but it may be something like  "struct foo".

Add support for it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 0b6cba442d72..21cc4e19a1e8 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -1026,7 +1026,7 @@ class KernelDoc:
 
         default_val = None
 
-        r= KernRe(OPTIONAL_VAR_ATTR + r"[\w_]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
+        r= KernRe(OPTIONAL_VAR_ATTR + r"\s*[\w_\s]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
         if r.match(proto):
             if not declaration_name:
                 declaration_name = r.group(1)
@@ -1037,7 +1037,7 @@ class KernelDoc:
                                   r.groups(), proto)
 
         else:
-            r= KernRe(OPTIONAL_VAR_ATTR + r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
+            r= KernRe(OPTIONAL_VAR_ATTR + r"(?:[\w_\s]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
 
             if r.match(proto):
                 default_val = r.group(1)
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 11/25] docs: kdoc_parser: fix parser to support multi-word types

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 11/25] docs: kdoc_parser: fix
> parser to support multi-word types
> 
> The regular expression currently expects a single word for the type,
> but it may be something like  "struct foo".
> 
> Add support for it.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 0b6cba442d72..21cc4e19a1e8 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -1026,7 +1026,7 @@ class KernelDoc:
> 
>          default_val = None
> 
> -        r= KernRe(OPTIONAL_VAR_ATTR +
> r"[\w_]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> +        r= KernRe(OPTIONAL_VAR_ATTR +
> + r"\s*[\w_\s]*\s+(?:\*+)?([\w_]+)\s*[\d\]\[]*\s*(=.*)?")
>          if r.match(proto):
>              if not declaration_name:
>                  declaration_name = r.group(1) @@ -1037,7 +1037,7 @@
> class KernelDoc:
>                                    r.groups(), proto)
> 
>          else:
> -            r= KernRe(OPTIONAL_VAR_ATTR +
> r"(?:[\w_]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> +            r= KernRe(OPTIONAL_VAR_ATTR +
> + r"(?:[\w_\s]*)?\s+(?:\*+)?(?:[\w_]+)\s*[\d\]\[]*\s*(=.*)?")
> 
>              if r.match(proto):
>                  default_val = r.group(1)
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 12/25] docs: kdoc_parser: ignore context analysis and lock attributes

[Mauro Carvalho Chehab]

From: Randy Dunlap <rdunlap@infradead.org>

Drop all context analysis and lock (tracking) attributes to avoid
kernel-doc warnings.

Documentation/core-api/kref:328: ../include/linux/kref.h:72: WARNING: Invalid C declaration: Expected end of definition. [error at 96]
  int kref_put_mutex (struct kref *kref, void (*release)(struct kref *kref), struct mutex *mutex) __cond_acquires(true# mutex)
  ------------------------------------------------------------------------------------------------^
Documentation/core-api/kref:328: ../include/linux/kref.h:94: WARNING: Invalid C declaration: Expected end of definition. [error at 92]
  int kref_put_lock (struct kref *kref, void (*release)(struct kref *kref), spinlock_t *lock) __cond_acquires(true# lock)
  --------------------------------------------------------------------------------------------^

The regex is suggested by Mauro; mine was too greedy. Thanks.
Updated context analysis and lock macros list provided by PeterZ. Thanks.

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/all/20260107161548.45530e1c@canb.auug.org.au/
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 21cc4e19a1e8..92b550189988 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -81,6 +81,8 @@ struct_xforms = [
     (KernRe(r'\s*__aligned\s*\([^;]*\)', re.S), ' '),
     (KernRe(r'\s*__counted_by\s*\([^;]*\)', re.S), ' '),
     (KernRe(r'\s*__counted_by_(le|be)\s*\([^;]*\)', re.S), ' '),
+    (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ' '),
+    (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ' '),
     (KernRe(r'\s*__packed\s*', re.S), ' '),
     (KernRe(r'\s*CRYPTO_MINALIGN_ATTR', re.S), ' '),
     (KernRe(r'\s*__private', re.S), ' '),
@@ -165,6 +167,16 @@ struct_nested_prefixes = [
 # the start delimiter.
 #
 function_nested_prefixes = [
+    (re.compile(r"__cond_acquires\s*\("), ""),
+    (re.compile(r"__cond_releases\s*\("), ""),
+    (re.compile(r"__acquires\s*\("), ""),
+    (re.compile(r"__releases\s*\("), ""),
+    (re.compile(r"__must_hold\s*\("), ""),
+    (re.compile(r"__must_not_hold\s*\("), ""),
+    (re.compile(r"__must_hold_shared\s*\("), ""),
+    (re.compile(r"__cond_acquires_shared\s*\("), ""),
+    (re.compile(r"__acquires_shared\s*\("), ""),
+    (re.compile(r"__releases_shared\s*\("), ""),
     (re.compile(r"__attribute__\s*\("), ""),
 ]
 
@@ -195,6 +207,7 @@ function_xforms = [
     (KernRe(r"__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +"), ""),
     (KernRe(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +"), ""),
     (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"), r"\1, \2"),
+    (KernRe(r"__no_context_analysis\s*"), ""),
     (KernRe(r"__attribute_const__ +"), ""),
 ]
 
@@ -204,6 +217,8 @@ function_xforms = [
 var_xforms = [
     (KernRe(r"__read_mostly"), ""),
     (KernRe(r"__ro_after_init"), ""),
+    (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ""),
+    (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ""),
     (KernRe(r"(?://.*)$"), ""),
     (KernRe(r"(?:/\*.*\*/)"), ""),
     (KernRe(r";$"), ""),
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 12/25] docs: kdoc_parser: ignore context analysis and lock attributes

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 12/25] docs: kdoc_parser: ignore
> context analysis and lock attributes
> 
> From: Randy Dunlap <rdunlap@infradead.org>
> 
> Drop all context analysis and lock (tracking) attributes to avoid
> kernel-doc warnings.
> 
> Documentation/core-api/kref:328: ../include/linux/kref.h:72: WARNING:
> Invalid C declaration: Expected end of definition. [error at 96]
>   int kref_put_mutex (struct kref *kref, void (*release)(struct kref
> *kref), struct mutex *mutex) __cond_acquires(true# mutex)
>   --------------------------------------------------------------------
> ----------------------------^
> Documentation/core-api/kref:328: ../include/linux/kref.h:94: WARNING:
> Invalid C declaration: Expected end of definition. [error at 92]
>   int kref_put_lock (struct kref *kref, void (*release)(struct kref
> *kref), spinlock_t *lock) __cond_acquires(true# lock)
>   --------------------------------------------------------------------
> ------------------------^
> 
> The regex is suggested by Mauro; mine was too greedy. Thanks.
> Updated context analysis and lock macros list provided by PeterZ.
> Thanks.
> 
> Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
> Closes:
> https://lore.kernel.org/all/20260107161548.45530e1c@canb.auug.org.au/
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 21cc4e19a1e8..92b550189988 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -81,6 +81,8 @@ struct_xforms = [
>      (KernRe(r'\s*__aligned\s*\([^;]*\)', re.S), ' '),
>      (KernRe(r'\s*__counted_by\s*\([^;]*\)', re.S), ' '),
>      (KernRe(r'\s*__counted_by_(le|be)\s*\([^;]*\)', re.S), ' '),
> +    (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ' '),
> +    (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ' '),
>      (KernRe(r'\s*__packed\s*', re.S), ' '),
>      (KernRe(r'\s*CRYPTO_MINALIGN_ATTR', re.S), ' '),
>      (KernRe(r'\s*__private', re.S), ' '), @@ -165,6 +167,16 @@
> struct_nested_prefixes = [  # the start delimiter.
>  #
>  function_nested_prefixes = [
> +    (re.compile(r"__cond_acquires\s*\("), ""),
> +    (re.compile(r"__cond_releases\s*\("), ""),
> +    (re.compile(r"__acquires\s*\("), ""),
> +    (re.compile(r"__releases\s*\("), ""),
> +    (re.compile(r"__must_hold\s*\("), ""),
> +    (re.compile(r"__must_not_hold\s*\("), ""),
> +    (re.compile(r"__must_hold_shared\s*\("), ""),
> +    (re.compile(r"__cond_acquires_shared\s*\("), ""),
> +    (re.compile(r"__acquires_shared\s*\("), ""),
> +    (re.compile(r"__releases_shared\s*\("), ""),
>      (re.compile(r"__attribute__\s*\("), ""),  ]
> 
> @@ -195,6 +207,7 @@ function_xforms = [
>      (KernRe(r"__(?:re)?alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\) +"),
> ""),
>      (KernRe(r"__diagnose_as\s*\(\s*\S+\s*(?:,\s*\d+\s*)*\) +"), ""),
>      (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"),
> r"\1, \2"),
> +    (KernRe(r"__no_context_analysis\s*"), ""),
>      (KernRe(r"__attribute_const__ +"), ""),  ]
> 
> @@ -204,6 +217,8 @@ function_xforms = [
>  var_xforms = [
>      (KernRe(r"__read_mostly"), ""),
>      (KernRe(r"__ro_after_init"), ""),
> +    (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ""),
> +    (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ""),
>      (KernRe(r"(?://.*)$"), ""),
>      (KernRe(r"(?:/\*.*\*/)"), ""),
>      (KernRe(r";$"), ""),
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 13/25] docs: kdoc_parser: add support for LIST_HEAD

[Mauro Carvalho Chehab]

Convert LIST_HEAD into struct list_head when handling its
prototype.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 92b550189988..33710c4be145 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -219,6 +219,7 @@ var_xforms = [
     (KernRe(r"__ro_after_init"), ""),
     (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ""),
     (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ""),
+    (KernRe(r"LIST_HEAD\(([\w_]+)\)"), r"struct list_head \1"),
     (KernRe(r"(?://.*)$"), ""),
     (KernRe(r"(?:/\*.*\*/)"), ""),
     (KernRe(r";$"), ""),
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 13/25] docs: kdoc_parser: add support for LIST_HEAD

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 13/25] docs: kdoc_parser: add
> support for LIST_HEAD
> 
> Convert LIST_HEAD into struct list_head when handling its prototype.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> Acked-by: Randy Dunlap <rdunlap@infradead.org>
> Tested-by: Randy Dunlap <rdunlap@infradead.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 92b550189988..33710c4be145 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -219,6 +219,7 @@ var_xforms = [
>      (KernRe(r"__ro_after_init"), ""),
>      (KernRe(r'\s*__guarded_by\s*\([^\)]*\)', re.S), ""),
>      (KernRe(r'\s*__pt_guarded_by\s*\([^\)]*\)', re.S), ""),
> +    (KernRe(r"LIST_HEAD\(([\w_]+)\)"), r"struct list_head \1"),
>      (KernRe(r"(?://.*)$"), ""),
>      (KernRe(r"(?:/\*.*\*/)"), ""),
>      (KernRe(r";$"), ""),
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 14/25] kdoc_parser: handle struct member macro VIRTIO_DECLARE_FEATURES(name)

[Mauro Carvalho Chehab]

From: Randy Dunlap <rdunlap@infradead.org>

Parse the macro VIRTIO_DECLARE_FEATURES(name) and expand it to its
definition. These prevents one build warning:

WARNING: include/linux/virtio.h:188 struct member 'VIRTIO_DECLARE_FEATURES(features' not described in 'virtio_device'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 33710c4be145..db140363104a 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -152,6 +152,7 @@ struct_xforms = [
             struct_args_pattern + r'\)', re.S), r'\1 \2[]'),
     (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + struct_args_pattern + r'\)', re.S), r'dma_addr_t \1'),
     (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern + r'\)', re.S), r'__u32 \1'),
+    (KernRe(r'VIRTIO_DECLARE_FEATURES\(([\w_]+)\)'), r'union { u64 \1; u64 \1_array[VIRTIO_FEATURES_U64S]; }'),
 ]
 #
 # Struct regexes here are guaranteed to have the end delimiter matching
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 14/25] kdoc_parser: handle struct member macro VIRTIO_DECLARE_FEATURES(name)

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 14/25] kdoc_parser: handle struct
> member macro VIRTIO_DECLARE_FEATURES(name)
> 
> From: Randy Dunlap <rdunlap@infradead.org>
> 
> Parse the macro VIRTIO_DECLARE_FEATURES(name) and expand it to its
> definition. These prevents one build warning:
> 
> WARNING: include/linux/virtio.h:188 struct member
> 'VIRTIO_DECLARE_FEATURES(features' not described in 'virtio_device'
> 
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 33710c4be145..db140363104a 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -152,6 +152,7 @@ struct_xforms = [
>              struct_args_pattern + r'\)', re.S), r'\1 \2[]'),
>      (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + struct_args_pattern +
> r'\)', re.S), r'dma_addr_t \1'),
>      (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern +
> r'\)', re.S), r'__u32 \1'),
> +    (KernRe(r'VIRTIO_DECLARE_FEATURES\(([\w_]+)\)'), r'union { u64
> \1;
> + u64 \1_array[VIRTIO_FEATURES_U64S]; }'),
>  ]
>  #
>  # Struct regexes here are guaranteed to have the end delimiter
> matching
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 15/25] docs: kdoc_re: properly handle strings and escape chars on it

[Mauro Carvalho Chehab]

The logic inside NestedMatch currently doesn't consider that
function arguments may have chars and strings, which may
eventually contain delimiters.

Add logic to handle strings and escape characters on them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index a0402c065d3a..1861799f1966 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -195,6 +195,8 @@ class NestedMatch:
         for match_re in regex.finditer(line):
             start = match_re.start()
             offset = match_re.end()
+            string_char = None
+            escape = False
 
             d = line[offset - 1]
             if d not in self.DELIMITER_PAIRS:
@@ -208,6 +210,22 @@ class NestedMatch:
 
                 d = line[pos]
 
+                if escape:
+                    escape = False
+                    continue
+
+                if string_char:
+                    if d == '\\':
+                        escape = True
+                    elif d == string_char:
+                        string_char = None
+
+                    continue
+
+                if d in ('"', "'"):
+                    string_char = d
+                    continue
+
                 if d in self.DELIMITER_PAIRS:
                     end = self.DELIMITER_PAIRS[d]
 
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 15/25] docs: kdoc_re: properly handle strings and escape chars on it

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 15/25] docs: kdoc_re: properly
> handle strings and escape chars on it
> 
> The logic inside NestedMatch currently doesn't consider that function
> arguments may have chars and strings, which may eventually contain
> delimiters.
> 
> Add logic to handle strings and escape characters on them.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index a0402c065d3a..1861799f1966 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -195,6 +195,8 @@ class NestedMatch:
>          for match_re in regex.finditer(line):
>              start = match_re.start()
>              offset = match_re.end()
> +            string_char = None
> +            escape = False
> 
>              d = line[offset - 1]
>              if d not in self.DELIMITER_PAIRS:
> @@ -208,6 +210,22 @@ class NestedMatch:
> 
>                  d = line[pos]
> 
> +                if escape:
> +                    escape = False
> +                    continue
> +
> +                if string_char:
> +                    if d == '\\':
> +                        escape = True
> +                    elif d == string_char:
> +                        string_char = None
> +
> +                    continue
> +
> +                if d in ('"', "'"):
> +                    string_char = d
> +                    continue
> +
>                  if d in self.DELIMITER_PAIRS:
>                      end = self.DELIMITER_PAIRS[d]
> 
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 16/25] docs: kdoc_re: better show KernRe() at documentation

[Mauro Carvalho Chehab]

the __repr__() function is used by autodoc to document macro
initialization.

Add a better representation for them.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 1861799f1966..f082f82bad67 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -52,7 +52,10 @@ class KernRe:
         return self.regex.pattern
 
     def __repr__(self):
-        return f're.compile("{self.regex.pattern}")'
+        if self.regex.flags:
+            return f'KernRe("{self.regex.pattern}", {self.regex.flags})'
+        else:
+            return f'KernRe("{self.regex.pattern}")'
 
     def __add__(self, other):
         """
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 16/25] docs: kdoc_re: better show KernRe() at documentation

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 16/25] docs: kdoc_re: better show
> KernRe() at documentation
> 
> the __repr__() function is used by autodoc to document macro
> initialization.
> 
> Add a better representation for them.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index 1861799f1966..f082f82bad67 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -52,7 +52,10 @@ class KernRe:
>          return self.regex.pattern
> 
>      def __repr__(self):
> -        return f're.compile("{self.regex.pattern}")'
> +        if self.regex.flags:
> +            return f'KernRe("{self.regex.pattern}",
> {self.regex.flags})'
> +        else:
> +            return f'KernRe("{self.regex.pattern}")'
> 
>      def __add__(self, other):
>          """
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 17/25] docs: kdoc_re: don't recompile NextMatch regex every time

[Mauro Carvalho Chehab]

Store delimiters and its regex-compiled version as const vars.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 35 ++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 13 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index f082f82bad67..b6e11ee0be21 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -81,6 +81,13 @@ class KernRe:
         self.last_match = self.regex.search(string)
         return self.last_match
 
+    def finditer(self,  string):
+        """
+        Alias to re.finditer.
+        """
+
+        return self.regex.finditer(string)
+
     def findall(self, string):
         """
         Alias to re.findall.
@@ -116,6 +123,16 @@ class KernRe:
 
         return self.last_match.groups()
 
+#: Nested delimited pairs (brackets and parenthesis)
+DELIMITER_PAIRS = {
+    '{': '}',
+    '(': ')',
+    '[': ']',
+}
+
+#: compiled delimiters
+RE_DELIM = KernRe(r'[\{\}\[\]\(\)]')
+
 
 class NestedMatch:
     """
@@ -165,14 +182,6 @@ class NestedMatch:
     #
     #   FOO(arg1, arg2, arg3)
 
-    DELIMITER_PAIRS = {
-        '{': '}',
-        '(': ')',
-        '[': ']',
-    }
-
-    RE_DELIM = re.compile(r'[\{\}\[\]\(\)]')
-
     def _search(self, regex, line):
         """
         Finds paired blocks for a regex that ends with a delimiter.
@@ -202,13 +211,13 @@ class NestedMatch:
             escape = False
 
             d = line[offset - 1]
-            if d not in self.DELIMITER_PAIRS:
+            if d not in DELIMITER_PAIRS:
                 continue
 
-            end = self.DELIMITER_PAIRS[d]
+            end = DELIMITER_PAIRS[d]
             stack.append(end)
 
-            for match in self.RE_DELIM.finditer(line[offset:]):
+            for match in RE_DELIM.finditer(line[offset:]):
                 pos = match.start() + offset
 
                 d = line[pos]
@@ -229,8 +238,8 @@ class NestedMatch:
                     string_char = d
                     continue
 
-                if d in self.DELIMITER_PAIRS:
-                    end = self.DELIMITER_PAIRS[d]
+                if d in DELIMITER_PAIRS:
+                    end = DELIMITER_PAIRS[d]
 
                     stack.append(end)
                     continue
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 17/25] docs: kdoc_re: don't recompile NextMatch regex every time

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 17/25] docs: kdoc_re: don't
> recompile NextMatch regex every time
> 
> Store delimiters and its regex-compiled version as const vars.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 35 ++++++++++++++++++++-----------
> -
>  1 file changed, 22 insertions(+), 13 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index f082f82bad67..b6e11ee0be21 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -81,6 +81,13 @@ class KernRe:
>          self.last_match = self.regex.search(string)
>          return self.last_match
> 
> +    def finditer(self,  string):
> +        """
> +        Alias to re.finditer.
> +        """
> +
> +        return self.regex.finditer(string)
> +
>      def findall(self, string):
>          """
>          Alias to re.findall.
> @@ -116,6 +123,16 @@ class KernRe:
> 
>          return self.last_match.groups()
> 
> +#: Nested delimited pairs (brackets and parenthesis) DELIMITER_PAIRS
> =
> +{
> +    '{': '}',
> +    '(': ')',
> +    '[': ']',
> +}
> +
> +#: compiled delimiters
> +RE_DELIM = KernRe(r'[\{\}\[\]\(\)]')
> +
> 
>  class NestedMatch:
>      """
> @@ -165,14 +182,6 @@ class NestedMatch:
>      #
>      #   FOO(arg1, arg2, arg3)
> 
> -    DELIMITER_PAIRS = {
> -        '{': '}',
> -        '(': ')',
> -        '[': ']',
> -    }
> -
> -    RE_DELIM = re.compile(r'[\{\}\[\]\(\)]')
> -
>      def _search(self, regex, line):
>          """
>          Finds paired blocks for a regex that ends with a delimiter.
> @@ -202,13 +211,13 @@ class NestedMatch:
>              escape = False
> 
>              d = line[offset - 1]
> -            if d not in self.DELIMITER_PAIRS:
> +            if d not in DELIMITER_PAIRS:
>                  continue
> 
> -            end = self.DELIMITER_PAIRS[d]
> +            end = DELIMITER_PAIRS[d]
>              stack.append(end)
> 
> -            for match in self.RE_DELIM.finditer(line[offset:]):
> +            for match in RE_DELIM.finditer(line[offset:]):
>                  pos = match.start() + offset
> 
>                  d = line[pos]
> @@ -229,8 +238,8 @@ class NestedMatch:
>                      string_char = d
>                      continue
> 
> -                if d in self.DELIMITER_PAIRS:
> -                    end = self.DELIMITER_PAIRS[d]
> +                if d in DELIMITER_PAIRS:
> +                    end = DELIMITER_PAIRS[d]
> 
>                      stack.append(end)
>                      continue
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 18/25] docs: kdoc_re: Change NestedMath args replacement to \0

[Mauro Carvalho Chehab]

Future patches will allow parsing each argument instead of the
hole set. Prepare for it by changing the replace all args from
\1 to \0.

No functional changes.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 2 +-
 tools/lib/python/kdoc/kdoc_re.py     | 9 +++++----
 2 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index db140363104a..4d52a00acfad 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -160,7 +160,7 @@ struct_xforms = [
 # is allowed.
 #
 struct_nested_prefixes = [
-    (re.compile(r'\bSTRUCT_GROUP\('), r'\1'),
+    (re.compile(r'\bSTRUCT_GROUP\('), r'\0'),
 ]
 
 #
diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index b6e11ee0be21..28ca5032f40c 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -271,8 +271,9 @@ class NestedMatch:
         It matches a regex that it is followed by a delimiter,
         replacing occurrences only if all delimiters are paired.
 
-        if r'\1' is used, it works just like re: it places there the
-        matched paired data with the delimiter stripped.
+        if r'\0' is used, it works on a similar way of using re.group(0):
+        it places the entire args of the matched paired data, with the
+        delimiter stripped.
 
         If count is different than zero, it will replace at most count
         items.
@@ -288,9 +289,9 @@ class NestedMatch:
             # Value, ignoring start/end delimiters
             value = line[end:pos - 1]
 
-            # replaces \1 at the sub string, if \1 is used there
+            # replaces \0 at the sub string, if \0 is used there
             new_sub = sub
-            new_sub = new_sub.replace(r'\1', value)
+            new_sub = new_sub.replace(r'\0', value)
 
             out += new_sub
 
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 18/25] docs: kdoc_re: Change NestedMath args replacement to \0

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 18/25] docs: kdoc_re: Change
> NestedMath args replacement to \0
> 
> Future patches will allow parsing each argument instead of the hole
> set. Prepare for it by changing the replace all args from
> \1 to \0.
> 
> No functional changes.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 2 +-
>  tools/lib/python/kdoc/kdoc_re.py     | 9 +++++----
>  2 files changed, 6 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index db140363104a..4d52a00acfad 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -160,7 +160,7 @@ struct_xforms = [
>  # is allowed.
>  #
>  struct_nested_prefixes = [
> -    (re.compile(r'\bSTRUCT_GROUP\('), r'\1'),
> +    (re.compile(r'\bSTRUCT_GROUP\('), r'\0'),
>  ]
> 
>  #
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index b6e11ee0be21..28ca5032f40c 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -271,8 +271,9 @@ class NestedMatch:
>          It matches a regex that it is followed by a delimiter,
>          replacing occurrences only if all delimiters are paired.
> 
> -        if r'\1' is used, it works just like re: it places there the
> -        matched paired data with the delimiter stripped.
> +        if r'\0' is used, it works on a similar way of using
> re.group(0):
> +        it places the entire args of the matched paired data, with
> the
> +        delimiter stripped.
> 
>          If count is different than zero, it will replace at most
> count
>          items.
> @@ -288,9 +289,9 @@ class NestedMatch:
>              # Value, ignoring start/end delimiters
>              value = line[end:pos - 1]
> 
> -            # replaces \1 at the sub string, if \1 is used there
> +            # replaces \0 at the sub string, if \0 is used there
>              new_sub = sub
> -            new_sub = new_sub.replace(r'\1', value)
> +            new_sub = new_sub.replace(r'\0', value)
> 
>              out += new_sub
> 
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 19/25] docs: kdoc_re: make NextedMatch use KernRe

[Mauro Carvalho Chehab]

Instead of using re_compile, let's create the class with the
rejex and use KernRe to keep it cached.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 55 ++++++++--------------------
 tools/lib/python/kdoc/kdoc_re.py     | 15 +++++---
 2 files changed, 25 insertions(+), 45 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 4d52a00acfad..3a5614106af7 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -153,32 +153,7 @@ struct_xforms = [
     (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + struct_args_pattern + r'\)', re.S), r'dma_addr_t \1'),
     (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern + r'\)', re.S), r'__u32 \1'),
     (KernRe(r'VIRTIO_DECLARE_FEATURES\(([\w_]+)\)'), r'union { u64 \1; u64 \1_array[VIRTIO_FEATURES_U64S]; }'),
-]
-#
-# Struct regexes here are guaranteed to have the end delimiter matching
-# the start delimiter. Yet, right now, only one replace group
-# is allowed.
-#
-struct_nested_prefixes = [
-    (re.compile(r'\bSTRUCT_GROUP\('), r'\0'),
-]
-
-#
-# Function Regexes here are guaranteed to have the end delimiter matching
-# the start delimiter.
-#
-function_nested_prefixes = [
-    (re.compile(r"__cond_acquires\s*\("), ""),
-    (re.compile(r"__cond_releases\s*\("), ""),
-    (re.compile(r"__acquires\s*\("), ""),
-    (re.compile(r"__releases\s*\("), ""),
-    (re.compile(r"__must_hold\s*\("), ""),
-    (re.compile(r"__must_not_hold\s*\("), ""),
-    (re.compile(r"__must_hold_shared\s*\("), ""),
-    (re.compile(r"__cond_acquires_shared\s*\("), ""),
-    (re.compile(r"__acquires_shared\s*\("), ""),
-    (re.compile(r"__releases_shared\s*\("), ""),
-    (re.compile(r"__attribute__\s*\("), ""),
+    (NestedMatch(r'\bSTRUCT_GROUP\('), r'\0'),
 ]
 
 #
@@ -210,6 +185,17 @@ function_xforms = [
     (KernRe(r"DECL_BUCKET_PARAMS\s*\(\s*(\S+)\s*,\s*(\S+)\s*\)"), r"\1, \2"),
     (KernRe(r"__no_context_analysis\s*"), ""),
     (KernRe(r"__attribute_const__ +"), ""),
+    (NestedMatch(r"__cond_acquires\s*\("), ""),
+    (NestedMatch(r"__cond_releases\s*\("), ""),
+    (NestedMatch(r"__acquires\s*\("), ""),
+    (NestedMatch(r"__releases\s*\("), ""),
+    (NestedMatch(r"__must_hold\s*\("), ""),
+    (NestedMatch(r"__must_not_hold\s*\("), ""),
+    (NestedMatch(r"__must_hold_shared\s*\("), ""),
+    (NestedMatch(r"__cond_acquires_shared\s*\("), ""),
+    (NestedMatch(r"__acquires_shared\s*\("), ""),
+    (NestedMatch(r"__releases_shared\s*\("), ""),
+    (NestedMatch(r"__attribute__\s*\("), ""),
 ]
 
 #
@@ -230,7 +216,6 @@ var_xforms = [
 # Ancillary functions
 #
 
-
 multi_space = KernRe(r'\s\s+')
 def trim_whitespace(s):
     """
@@ -424,8 +409,6 @@ class KernelDoc:
         # Place all potential outputs into an array
         self.entries = []
 
-        self.nested = NestedMatch()
-
         #
         # We need Python 3.7 for its "dicts remember the insertion
         # order" guarantee
@@ -523,14 +506,11 @@ class KernelDoc:
         # State flags
         self.state = state.NORMAL
 
-    def apply_transforms(self, regex_xforms, nested_xforms, text):
+    def apply_transforms(self, xforms, text):
         """Apply a set of transforms to a block of text."""
-        for search, subst in regex_xforms:
+        for search, subst in xforms:
             text = search.sub(subst, text)
 
-        for search, sub in nested_xforms:
-            text = self.nested.sub(search, sub, text)
-
         return text.strip()
 
     def push_parameter(self, ln, decl_type, param, dtype,
@@ -909,8 +889,7 @@ class KernelDoc:
         # Go through the list of members applying all of our transformations.
         #
         members = trim_private_members(members)
-        members = self.apply_transforms(struct_xforms, struct_nested_prefixes,
-                                        members)
+        members = self.apply_transforms(struct_xforms, members)
 
         #
         # Deal with embedded struct and union members, and drop enums entirely.
@@ -1125,9 +1104,7 @@ class KernelDoc:
             #
             # Apply the initial transformations.
             #
-            prototype = self.apply_transforms(function_xforms,
-                                              function_nested_prefixes,
-                                              prototype)
+            prototype = self.apply_transforms(function_xforms, prototype)
 
         # Yes, this truly is vile.  We are looking for:
         # 1. Return type (may be nothing if we're looking at a macro)
diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index 28ca5032f40c..aabfd6c4fd71 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -182,7 +182,10 @@ class NestedMatch:
     #
     #   FOO(arg1, arg2, arg3)
 
-    def _search(self, regex, line):
+    def __init__(self, regex):
+        self.regex = KernRe(regex)
+
+    def _search(self, line):
         """
         Finds paired blocks for a regex that ends with a delimiter.
 
@@ -204,7 +207,7 @@ class NestedMatch:
 
         stack = []
 
-        for match_re in regex.finditer(line):
+        for match_re in self.regex.finditer(line):
             start = match_re.start()
             offset = match_re.end()
             string_char = None
@@ -252,7 +255,7 @@ class NestedMatch:
                         yield start, offset, pos + 1
                         break
 
-    def search(self, regex, line):
+    def search(self, line):
         """
         This is similar to re.search:
 
@@ -260,11 +263,11 @@ class NestedMatch:
         returning occurrences only if all delimiters are paired.
         """
 
-        for t in self._search(regex, line):
+        for t in self._search(line):
 
             yield line[t[0]:t[2]]
 
-    def sub(self, regex, sub, line, count=0):
+    def sub(self, sub, line, count=0):
         """
         This is similar to re.sub:
 
@@ -283,7 +286,7 @@ class NestedMatch:
         cur_pos = 0
         n = 0
 
-        for start, end, pos in self._search(regex, line):
+        for start, end, pos in self._search(line):
             out += line[cur_pos:start]
 
             # Value, ignoring start/end delimiters
-- 
2.52.0

[PATCH v2 20/25] tools: kdoc_re: add support on NestedMatch for argument replacement

[Mauro Carvalho Chehab]

Currently, NestedMatch has very limited support for aguments
replacement: it is all or nothing.

Add support to allow replacing individual arguments as well.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 61 ++++++++++++++++++++++++++++++--
 1 file changed, 59 insertions(+), 2 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index aabfd6c4fd71..f49a568b9155 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -267,6 +267,59 @@ class NestedMatch:
 
             yield line[t[0]:t[2]]
 
+    @staticmethod
+    def _split_args(all_args, delim=","):
+        """
+        Helper method to split comma-separated function arguments
+        or struct elements, if delim is set to ";".
+
+        It returns a list of arguments that can be used later on by
+        the sub() method.
+        """
+        args = [all_args]
+        stack = []
+        arg_start = 0
+        string_char = None
+        escape = False
+
+        for idx, d in enumerate(all_args):
+            if escape:
+                escape = False
+                continue
+
+            if string_char:
+                if d == '\\':
+                    escape = True
+                elif d == string_char:
+                    string_char = None
+
+                continue
+
+            if d in ('"', "'"):
+                string_char = d
+                continue
+
+            if d in DELIMITER_PAIRS:
+                end = DELIMITER_PAIRS[d]
+
+                stack.append(end)
+                continue
+
+            if stack and d == stack[-1]:
+                stack.pop()
+                continue
+
+            if d == delim and not stack:
+                args.append(all_args[arg_start:idx].strip())
+                arg_start = idx + 1
+
+        # Add the last argument (if any)
+        last = all_args[arg_start:].strip()
+        if last:
+            args.append(last)
+
+        return args
+
     def sub(self, sub, line, count=0):
         """
         This is similar to re.sub:
@@ -292,9 +345,13 @@ class NestedMatch:
             # Value, ignoring start/end delimiters
             value = line[end:pos - 1]
 
-            # replaces \0 at the sub string, if \0 is used there
+            # replace arguments
             new_sub = sub
-            new_sub = new_sub.replace(r'\0', value)
+            if "\\" in sub:
+                args = self._split_args(value)
+
+                new_sub = re.sub(r'\\(\d+)',
+                                 lambda m: args[int(m.group(1))], new_sub)
 
             out += new_sub
 
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 20/25] tools: kdoc_re: add support on NestedMatch for argument replacement

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 20/25] tools: kdoc_re: add
> support on NestedMatch for argument replacement
> 
> Currently, NestedMatch has very limited support for aguments
> replacement: it is all or nothing.
> 
> Add support to allow replacing individual arguments as well.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 61 ++++++++++++++++++++++++++++++-
> -
>  1 file changed, 59 insertions(+), 2 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index aabfd6c4fd71..f49a568b9155 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -267,6 +267,59 @@ class NestedMatch:
> 
>              yield line[t[0]:t[2]]
> 
> +    @staticmethod
> +    def _split_args(all_args, delim=","):
> +        """
> +        Helper method to split comma-separated function arguments
> +        or struct elements, if delim is set to ";".
> +
> +        It returns a list of arguments that can be used later on by
> +        the sub() method.
> +        """
> +        args = [all_args]
> +        stack = []
> +        arg_start = 0
> +        string_char = None
> +        escape = False
> +
> +        for idx, d in enumerate(all_args):
> +            if escape:
> +                escape = False
> +                continue
> +
> +            if string_char:
> +                if d == '\\':
> +                    escape = True
> +                elif d == string_char:
> +                    string_char = None
> +
> +                continue
> +
> +            if d in ('"', "'"):
> +                string_char = d
> +                continue
> +
> +            if d in DELIMITER_PAIRS:
> +                end = DELIMITER_PAIRS[d]
> +
> +                stack.append(end)
> +                continue
> +
> +            if stack and d == stack[-1]:
> +                stack.pop()
> +                continue
> +
> +            if d == delim and not stack:
> +                args.append(all_args[arg_start:idx].strip())
> +                arg_start = idx + 1
> +
> +        # Add the last argument (if any)
> +        last = all_args[arg_start:].strip()
> +        if last:
> +            args.append(last)
> +
> +        return args
> +
>      def sub(self, sub, line, count=0):
>          """
>          This is similar to re.sub:
> @@ -292,9 +345,13 @@ class NestedMatch:
>              # Value, ignoring start/end delimiters
>              value = line[end:pos - 1]
> 
> -            # replaces \0 at the sub string, if \0 is used there
> +            # replace arguments
>              new_sub = sub
> -            new_sub = new_sub.replace(r'\0', value)
> +            if "\\" in sub:
> +                args = self._split_args(value)
> +
> +                new_sub = re.sub(r'\\(\d+)',
> +                                 lambda m: args[int(m.group(1))],
> new_sub)
> 
>              out += new_sub
> 
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 21/25] tools: python: add helpers to run unit tests

[Mauro Carvalho Chehab]

While python internal libraries have support for unit tests, its
output is not nice. Add a helper module to improve its output.

I wrote this module last year while testing some scripts I used
internally. The initial skeleton was generated with the help of
LLM tools, but it was higly modified to ensure that it will work
as I would expect.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/unittest_helper.py | 293 ++++++++++++++++++++++++++++
 1 file changed, 293 insertions(+)
 create mode 100755 tools/lib/python/unittest_helper.py

diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
new file mode 100755
index 000000000000..e438472fa704
--- /dev/null
+++ b/tools/lib/python/unittest_helper.py
@@ -0,0 +1,293 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2025-2026: Mauro Carvalho Chehab <mchehab@kernel.org>.
+#
+# pylint: disable=C0103,R0912,R0914,E1101
+
+"""
+Helper class to better display unittest results.
+
+Those help functions provide a nice colored output summary of each
+executed test and, when a test fails, it shows the different in diff
+format when running in verbose mode, like::
+
+    $ tools/unittests/nested_match.py -v
+    ...
+    Traceback (most recent call last):
+    File "/new_devel/docs/tools/unittests/nested_match.py", line 69, in test_count_limit
+        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
+        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b); foo(c)'
+    - bar(a) foo(b); foo(c)
+    ?       ^^^^
+    + bar(a); bar(b); foo(c)
+    ?       ^^^^^
+    ...
+
+It also allows filtering what tests will be executed via ``-k`` parameter.
+
+Typical usage is to do::
+
+    from unittest_helper import run_unittest
+    ...
+
+    if __name__ == "__main__":
+        run_unittest(__file__)
+
+If passing arguments is needed, on a more complex scenario, it can be
+used like on this example::
+
+    from unittest_helper import TestUnits, run_unittest
+    ...
+    env = {'sudo': ""}
+    ...
+    if __name__ == "__main__":
+        runner = TestUnits()
+        base_parser = runner.parse_args()
+        base_parser.add_argument('--sudo', action='store_true',
+                                help='Enable tests requiring sudo privileges')
+
+        args = base_parser.parse_args()
+
+        # Update module-level flag
+        if args.sudo:
+            env['sudo'] = "1"
+
+        # Run tests with customized arguments
+        runner.run(__file__, parser=base_parser, args=args, env=env)
+"""
+
+import argparse
+import atexit
+import os
+import re
+import unittest
+import sys
+
+from unittest.mock import patch
+
+
+class Summary(unittest.TestResult):
+    """
+    Overrides unittest.TestResult class to provide a nice colored
+    summary. When in verbose mode, displays actual/expected difference in
+    unified diff format.
+    """
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        #: Dictionary to store organized test results
+        self.test_results = {}
+
+        #: max length of the test names
+        self.max_name_length = 0
+
+    def startTest(self, test):
+        super().startTest(test)
+        test_id = test.id()
+        parts = test_id.split(".")
+        # Extract module, class, and method names
+        if len(parts) >= 3:
+            module_name = parts[-3]
+        else:
+            module_name = ""
+        if len(parts) >= 2:
+            class_name = parts[-2]
+        else:
+            class_name = ""
+        method_name = parts[-1]
+        # Build the hierarchical structure
+        if module_name not in self.test_results:
+            self.test_results[module_name] = {}
+        if class_name not in self.test_results[module_name]:
+            self.test_results[module_name][class_name] = []
+        # Track maximum test name length for alignment
+        display_name = f"{method_name}:"
+
+        self.max_name_length = max(len(display_name), self.max_name_length)
+
+    def _record_test(self, test, status):
+        test_id = test.id()
+        parts = test_id.split(".")
+        if len(parts) >= 3:
+            module_name = parts[-3]
+        else:
+            module_name = ""
+        if len(parts) >= 2:
+            class_name = parts[-2]
+        else:
+            class_name = ""
+        method_name = parts[-1]
+        self.test_results[module_name][class_name].append((method_name, status))
+
+    def addSuccess(self, test):
+        super().addSuccess(test)
+        self._record_test(test, "OK")
+
+    def addFailure(self, test, err):
+        super().addFailure(test, err)
+        self._record_test(test, "FAIL")
+
+    def addError(self, test, err):
+        super().addError(test, err)
+        self._record_test(test, "ERROR")
+
+    def addSkip(self, test, reason):
+        super().addSkip(test, reason)
+        self._record_test(test, f"SKIP ({reason})")
+
+    def printResults(self):
+        """
+        Print results using colors if tty.
+        """
+        # Check for ANSI color support
+        use_color = sys.stdout.isatty()
+        COLORS = {
+            "OK":            "\033[32m",   # Green
+            "FAIL":          "\033[31m",   # Red
+            "SKIP":          "\033[1;33m", # Yellow
+            "PARTIAL":       "\033[33m",   # Orange
+            "EXPECTED_FAIL": "\033[36m",   # Cyan
+            "reset":         "\033[0m",    # Reset to default terminal color
+        }
+        if not use_color:
+            for c in COLORS:
+                COLORS[c] = ""
+
+        # Calculate maximum test name length
+        if not self.test_results:
+            return
+        try:
+            lengths = []
+            for module in self.test_results.values():
+                for tests in module.values():
+                    for test_name, _ in tests:
+                        lengths.append(len(test_name) + 1)  # +1 for colon
+            max_length = max(lengths) + 2  # Additional padding
+        except ValueError:
+            sys.exit("Test list is empty")
+
+        # Print results
+        for module_name, classes in self.test_results.items():
+            print(f"{module_name}:")
+            for class_name, tests in classes.items():
+                print(f"    {class_name}:")
+                for test_name, status in tests:
+                    # Get base status without reason for SKIP
+                    if status.startswith("SKIP"):
+                        status_code = status.split()[0]
+                    else:
+                        status_code = status
+                    color = COLORS.get(status_code, "")
+                    print(
+                        f"        {test_name + ':':<{max_length}}{color}{status}{COLORS['reset']}"
+                    )
+            print()
+
+        # Print summary
+        print(f"\nRan {self.testsRun} tests", end="")
+        if hasattr(self, "timeTaken"):
+            print(f" in {self.timeTaken:.3f}s", end="")
+        print()
+
+        if not self.wasSuccessful():
+            print(f"\n{COLORS['FAIL']}FAILED (", end="")
+            failures = getattr(self, "failures", [])
+            errors = getattr(self, "errors", [])
+            if failures:
+                print(f"failures={len(failures)}", end="")
+            if errors:
+                if failures:
+                    print(", ", end="")
+                print(f"errors={len(errors)}", end="")
+            print(f"){COLORS['reset']}")
+
+
+def flatten_suite(suite):
+    """Flatten test suite hierarchy"""
+    tests = []
+    for item in suite:
+        if isinstance(item, unittest.TestSuite):
+            tests.extend(flatten_suite(item))
+        else:
+            tests.append(item)
+    return tests
+
+
+class TestUnits:
+    """
+    Helper class to set verbosity level
+    """
+    def parse_args(self):
+        """Returns a parser for command line arguments."""
+        parser = argparse.ArgumentParser(description="Test runner with regex filtering")
+        parser.add_argument("-v", "--verbose", action="count", default=1)
+        parser.add_argument("-f", "--failfast", action="store_true")
+        parser.add_argument("-k", "--keyword",
+                            help="Regex pattern to filter test methods")
+        return parser
+
+    def run(self, caller_file, parser=None, args=None, env=None):
+        """Execute all tests from the unity test file"""
+        if not args:
+            if not parser:
+                parser = self.parse_args()
+            args = parser.parse_args()
+
+        if env:
+            patcher = patch.dict(os.environ, env)
+            patcher.start()
+            # ensure it gets stopped after
+            atexit.register(patcher.stop)
+
+        verbose = args.verbose
+
+        if verbose >= 2:
+            unittest.TextTestRunner(verbosity=verbose).run = lambda suite: suite
+
+        # Load ONLY tests from the calling file
+        loader = unittest.TestLoader()
+        suite = loader.discover(start_dir=os.path.dirname(caller_file),
+                                pattern=os.path.basename(caller_file))
+
+        # Flatten the suite for environment injection
+        tests_to_inject = flatten_suite(suite)
+
+        # Filter tests by method name if -k specified
+        if args.keyword:
+            try:
+                pattern = re.compile(args.keyword)
+                filtered_suite = unittest.TestSuite()
+                for test in tests_to_inject:  # Use the pre-flattened list
+                    method_name = test.id().split(".")[-1]
+                    if pattern.search(method_name):
+                        filtered_suite.addTest(test)
+                suite = filtered_suite
+            except re.error as e:
+                sys.stderr.write(f"Invalid regex pattern: {e}\n")
+                sys.exit(1)
+        else:
+            # Maintain original suite structure if no keyword filtering
+            suite = unittest.TestSuite(tests_to_inject)
+
+        if verbose >= 2:
+            resultclass = None
+        else:
+            resultclass = Summary
+
+        runner = unittest.TextTestRunner(verbosity=args.verbose,
+                                            resultclass=resultclass,
+                                            failfast=args.failfast)
+        result = runner.run(suite)
+        if resultclass:
+            result.printResults()
+
+        sys.exit(not result.wasSuccessful())
+
+
+def run_unittest(fname):
+    """
+    Basic usage of TestUnits class.
+    Use it when there's no need to pass any extra argument to the tests.
+    """
+    TestUnits().run(fname)
-- 
2.52.0

[PATCH v2 22/25] unittests: add tests for NestedMatch class

[Mauro Carvalho Chehab]

The NestedMatch logic is complex enough to justify tests to ensure
that it is doing its job.

Add unittests to check the functionality provided by NestedMatch
by replicating expected patterns.

The NestedMatch class handles with complex macros. Add an unittest
to check if its doing the right thing and detect eventual regressions
as we improve its code.

LLMs are pretty good writing unit tests, as those are just
repetitive patterns that are built from the existing code.

To speedup writing this one, I used gpt-oss:latest running on
my local GPU, feeding it with my class and with replacement
patterns from the kernel.

I highly modified the generated code, though to ensure that the
testset is representative and that all tests pass.

    $ tools/unittests/nested_match.py
    Ran 35 tests in 0.001s

    OK
    nested_match:
        TestStructGroup:
            test_struct_group_01:            OK
            test_struct_group_02:            OK
            test_struct_group_03:            OK
            test_struct_group_04:            OK
            test_struct_group_05:            OK
            test_struct_group_06:            OK
            test_struct_group_07:            OK
            test_struct_group_08:            OK
            test_struct_group_09:            OK
            test_struct_group_10:            OK
            test_struct_group_11:            OK
            test_struct_group_12:            OK
            test_struct_group_13:            OK
            test_struct_group_14:            OK
            test_struct_group_15:            OK
            test_struct_group_16:            OK
            test_struct_group_17:            OK
            test_struct_group_18:            OK
            test_struct_group_19:            OK
            test_struct_group_sub:           OK
        TestSubMacros:
            test_acquires_multiple:          OK
            test_acquires_nested_paren:      OK
            test_acquires_simple:            OK
            test_mixed_macros:               OK
            test_must_hold:                  OK
            test_must_hold_shared:           OK
            test_no_false_positive:          OK
            test_no_macro_remains:           OK
        TestSubReplacement:
            test_sub_count_parameter:        OK
            test_sub_mixed_placeholders:     OK
            test_sub_multiple_placeholders:  OK
            test_sub_no_placeholder:         OK
            test_sub_single_placeholder:     OK
            test_sub_with_capture:           OK
            test_sub_zero_placeholder:       OK

    Ran 35 tests

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/unittests/nested_match.py | 589 ++++++++++++++++++++++++++++++++
 1 file changed, 589 insertions(+)
 create mode 100755 tools/unittests/nested_match.py

diff --git a/tools/unittests/nested_match.py b/tools/unittests/nested_match.py
new file mode 100755
index 000000000000..570e98730b28
--- /dev/null
+++ b/tools/unittests/nested_match.py
@@ -0,0 +1,589 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0
+# Copyright(c) 2026: Mauro Carvalho Chehab <mchehab@kernel.org>.
+#
+# pylint: disable=C0413,R0904
+
+
+"""
+Unit tests for kernel-doc NestedMatch.
+"""
+
+import os
+import re
+import sys
+import unittest
+
+# Import Python modules
+
+SRC_DIR = os.path.dirname(os.path.realpath(__file__))
+sys.path.insert(0, os.path.join(SRC_DIR, "../lib/python"))
+
+from kdoc.kdoc_re import NestedMatch
+from unittest_helper import run_unittest
+
+# --------------------------------------------------------------------------
+# Verify if struct_group matches are properly handled
+# --------------------------------------------------------------------------
+
+
+class TestStructGroup(unittest.TestCase):
+    """
+    Test diferent struct_group patterns.
+
+    Please notice that in this class, there are multiple whitespaces on
+    some places. That's because it tries to mimic how kernel-doc parser
+    internally works.
+    """
+
+    @classmethod
+    def setUpClass(cls):
+        """
+        Define a NestedMatch to be used for all tests picking all
+        struct_group macros.
+        """
+        cls.matcher = NestedMatch(r"\bstruct_group[\w\_]*\(")
+
+    def _check_matches(self, line: str, expected_count: int):
+        """count and validate each match"""
+
+        matches = list(self.matcher.search(line))
+        self.assertEqual(len(matches), expected_count,
+                         msg=f"Expected {expected_count} matches, got {len(matches)}")
+
+        for m in matches:
+            self.assertTrue(m.startswith("struct_group") and "(" in m,
+                            msg=f"Match does not start correctly: {m!r}")
+            self.assertTrue(m.endswith(")"),
+                            msg=f"Match does not end correctly: {m!r}")
+
+    def test_struct_group_01(self):
+        """one struct_group with nested delimiters."""
+        line = (
+            "__be16 id; struct_group(body, __be16 epl_len; u8 lpl_len; u8"
+            " chk_code; u8 resv1; u8 resv2; u8"
+            " payload[ETHTOOL_CMIS_CDB_LPL_MAX_PL_LENGTH]; ); u8 *epl;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_02(self):
+        """two struct_group_tagged, one per page_pool_params."""
+        line = (
+            "struct_group_tagged(page_pool_params_fast, fast, unsigned int   "
+            " order; unsigned int    pool_size; int             nid; struct"
+            " device   *dev; struct napi_struct *napi; enum dma_data_direction"
+            " dma_dir; unsigned int    max_len; unsigned int    offset; );"
+            " struct_group_tagged(page_pool_params_slow, slow, struct"
+            " net_device *netdev; unsigned int queue_idx; unsigned int   "
+            " flags;)"
+        )
+        self._check_matches(line, 2)
+
+    def test_struct_group_03(self):
+        """two struct_group_tagged, one with nested structs."""
+        line = (
+            "struct_group_tagged(libeth_xskfq_fp, fp, struct xsk_buff_pool   "
+            " *pool; struct libeth_xdp_buff  **fqes; void                   "
+            " *descs; u32                     ntu; u32                    "
+            " count; );u32                     pending; u32                   "
+            "  thresh; u32                     buf_len; int                   "
+            "  nid;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_04(self):
+        """one struct_group_tagged with many fields."""
+        line = (
+            "struct_group_tagged(libeth_fq_fp, fp, struct page_pool       "
+            " *pp; struct libeth_fqe       *fqes; u32                    "
+            " truesize; u32                     count; );enum libeth_fqe_type "
+            "   type:2; bool                    hsplit:1; bool                "
+            "    xdp:1; u32                     buf_len; int                  "
+            "   nid;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_05(self):
+        """long line with a struct_group(priv_flags_fast)."""
+        line = (
+            "  struct_group(priv_flags_fast, unsigned long          "
+            " priv_flags:32; unsigned long           lltx:1; unsigned long    "
+            "       netmem_tx:1; ); const struct net_device_ops *netdev_ops;"
+            " const struct header_ops *header_ops; struct netdev_queue    "
+            " *_tx; netdev_features_t       gso_partial_features; unsigned int"
+            "            real_num_tx_queues; unsigned int           "
+            " gso_max_size; unsigned int            gso_ipv4_max_size; u16    "
+            "                 gso_max_segs; s16                    "
+            " num_tc;unsigned int            mtu; unsigned short         "
+            " needed_headroom; struct netdev_tc_txq   "
+            " tc_to_txq[TC_MAX_QUEUE]; #ifdef CONFIG_XPS; struct xps_dev_maps "
+            " *xps_maps[XPS_MAPS_MAX]; #endif; #ifdef CONFIG_NETFILTER_EGRESS;"
+            " struct nf_hook_entries  *nf_hooks_egress; #endif; #ifdef"
+            " CONFIG_NET_XGRESS; struct bpf_mprog_entry  *tcx_egress; #endif;"
+            " union { struct pcpu_lstats __percpu             *lstats; struct"
+            " pcpu_sw_netstats __percpu        *tstats; struct pcpu_dstats"
+            " __percpu             *dstats; }; unsigned long           state;"
+            " unsigned int            flags; unsigned short         "
+            " hard_header_len; netdev_features_t       features; struct"
+            " inet6_dev   *ip6_ptr; struct bpf_prog    *xdp_prog; struct"
+            " list_head        ptype_specific; int                    "
+            " ifindex; unsigned int            real_num_rx_queues; struct"
+            " netdev_rx_queue  *_rx; unsigned int            gro_max_size;"
+            " unsigned int            gro_ipv4_max_size; rx_handler_func_t "
+            " *rx_handler; void               *rx_handler_data; possible_net_t"
+            "                  nd_net; #ifdef CONFIG_NETPOLL; struct"
+            " netpoll_info        *npinfo; #endif; #ifdef CONFIG_NET_XGRESS;"
+            " struct bpf_mprog_entry  *tcx_ingress; #endif; char              "
+            "      name[IFNAMSIZ]; struct netdev_name_node *name_node; struct"
+            " dev_ifalias  *ifalias;unsigned long           mem_end; unsigned"
+            " long           mem_start; unsigned long          "
+            " base_addr;struct list_head        dev_list; struct list_head    "
+            "    napi_list; struct list_head        unreg_list; struct"
+            " list_head        close_list; struct list_head        ptype_all;"
+            " struct { struct list_head upper; struct list_head lower; }"
+            " adj_list;xdp_features_t          xdp_features; const struct"
+            " xdp_metadata_ops *xdp_metadata_ops; const struct"
+            " xsk_tx_metadata_ops *xsk_tx_metadata_ops; unsigned short        "
+            "  gflags; unsigned short          needed_tailroom;"
+            " netdev_features_t       hw_features; netdev_features_t      "
+            " wanted_features; netdev_features_t       vlan_features;"
+            " netdev_features_t       hw_enc_features; netdev_features_t      "
+            " mpls_features; unsigned int            min_mtu; unsigned int    "
+            "        max_mtu; unsigned short          type; unsigned char     "
+            "      min_header_len; unsigned char           name_assign_type;"
+            " int                     group; struct net_device_stats"
+            " stats;struct net_device_core_stats __percpu *core_stats;atomic_t"
+            " tx_request;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_06(self):
+        """struct_group(addrs)."""
+        line = (
+            "struct_group(addrs, unsigned char   h_dest[ETH_ALEN]; unsigned"
+            " char   h_source[ETH_ALEN]; ); __be16          h_vlan_proto;"
+            " __be16          h_vlan_TCI; __be16         "
+            " h_vlan_encapsulated_proto;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_07(self):
+        """one struct_group(headers)."""
+        line = (
+            "union { struct {struct sk_buff          *next; struct sk_buff    "
+            "      *prev; union { struct net_device       *dev;unsigned long  "
+            "         dev_scratch; }; }; struct rb_node          rbnode;struct"
+            " list_head        list; struct llist_node       ll_node; };"
+            " struct sock             *sk; union { ktime_t         tstamp; u64"
+            "             skb_mstamp_ns;};char                    cb[48] ;"
+            " union { struct { unsigned long   _skb_refdst; void           "
+            " (*destructor)(struct sk_buff *skb); }; struct list_head       "
+            " tcp_tsorted_anchor; #ifdef CONFIG_NET_SOCK_MSG; unsigned long   "
+            "        _sk_redir; #endif; }; #if defined(CONFIG_NF_CONNTRACK) ||"
+            " defined(CONFIG_NF_CONNTRACK_MODULE); unsigned long           "
+            " _nfct; #endif; unsigned int            len, data_len; __u16     "
+            "              mac_len, hdr_len;__u16                  "
+            " queue_mapping;#ifdef __BIG_ENDIAN_BITFIELD; #define CLONED_MASK "
+            "    (1 << 7); #else; #define CLONED_MASK     1; #endif; #define"
+            " CLONED_OFFSET           offsetof(struct sk_buff,"
+            " __cloned_offset);  __u8                    cloned:1, nohdr:1,"
+            " fclone:2, peeked:1, head_frag:1, pfmemalloc:1,"
+            " pp_recycle:1;#ifdef CONFIG_SKB_EXTENSIONS; __u8                 "
+            "   active_extensions; #endif;struct_group(headers,  __u8         "
+            "           pkt_type:3;__u8                    ignore_df:1; __u8  "
+            "                  dst_pending_confirm:1; __u8                   "
+            " ip_summed:2; __u8                    ooo_okay:1;  __u8          "
+            "          tstamp_type:2;#ifdef CONFIG_NET_XGRESS; __u8           "
+            "         tc_at_ingress:1;__u8                   "
+            " tc_skip_classify:1; #endif; __u8                   "
+            " remcsum_offload:1; __u8                    csum_complete_sw:1;"
+            " __u8                    csum_level:2; __u8                   "
+            " inner_protocol_type:1; __u8                    l4_hash:1; __u8  "
+            "                  sw_hash:1; #ifdef CONFIG_WIRELESS; __u8        "
+            "            wifi_acked_valid:1; __u8                   "
+            " wifi_acked:1; #endif; __u8                    no_fcs:1;__u8     "
+            "               encapsulation:1; __u8                   "
+            " encap_hdr_csum:1; __u8                    csum_valid:1; #ifdef"
+            " CONFIG_IPV6_NDISC_NODETYPE; __u8                   "
+            " ndisc_nodetype:2; #endif; #if IS_ENABLED(CONFIG_IP_VS); __u8    "
+            "                ipvs_property:1; #endif; #if"
+            " IS_ENABLED(CONFIG_NETFILTER_XT_TARGET_TRACE) ||"
+            " IS_ENABLED(CONFIG_NF_TABLES); __u8                   "
+            " nf_trace:1; #endif; #ifdef CONFIG_NET_SWITCHDEV; __u8           "
+            "         offload_fwd_mark:1; __u8                   "
+            " offload_l3_fwd_mark:1; #endif; __u8                   "
+            " redirected:1; #ifdef CONFIG_NET_REDIRECT; __u8                  "
+            "  from_ingress:1; #endif; #ifdef CONFIG_NETFILTER_SKIP_EGRESS;"
+            " __u8                    nf_skip_egress:1; #endif; #ifdef"
+            " CONFIG_SKB_DECRYPTED; __u8                    decrypted:1;"
+            " #endif; __u8                    slow_gro:1; #if"
+            " IS_ENABLED(CONFIG_IP_SCTP); __u8                   "
+            " csum_not_inet:1; #endif; __u8                    unreadable:1;"
+            " #if defined(CONFIG_NET_SCHED) || defined(CONFIG_NET_XGRESS);"
+            " __u16                   tc_index;#endif; u16                    "
+            " alloc_cpu; union { __wsum          csum; struct { __u16  "
+            " csum_start; __u16   csum_offset; }; }; __u32                  "
+            " priority; int                     skb_iif; __u32                "
+            "   hash; union { u32             vlan_all; struct { __be16 "
+            " vlan_proto; __u16   vlan_tci; }; }; #if"
+            " defined(CONFIG_NET_RX_BUSY_POLL) || defined(CONFIG_XPS); union {"
+            " unsigned int    napi_id; unsigned int    sender_cpu; }; };"
+            " #ifdef CONFIG_NETWORK_SECMARK; __u32           secmark; #endif;"
+            " union { __u32           mark; __u32           reserved_tailroom;"
+            " }; union { __be16          inner_protocol; __u8           "
+            " inner_ipproto; }; __u16                  "
+            " inner_transport_header; __u16                  "
+            " inner_network_header; __u16                   inner_mac_header;"
+            " __be16                  protocol; __u16                  "
+            " transport_header; __u16                   network_header; __u16 "
+            "                  mac_header; #ifdef CONFIG_KCOV; u64            "
+            "         kcov_handle; #endif; );sk_buff_data_t          tail;"
+            " sk_buff_data_t          end; unsigned char           *head,"
+            " *data; unsigned int            truesize; refcount_t             "
+            " users; #ifdef CONFIG_SKB_EXTENSIONS;struct skb_ext         "
+            " *extensions; #endif;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_08(self):
+        """two struct_group(stats)."""
+        line = (
+            "enum ethtool_mac_stats_src src; struct_group(stats, u64"
+            " tx_pause_frames; u64 rx_pause_frames; ); enum"
+            " ethtool_mac_stats_src src; struct_group(stats, u64"
+            " undersize_pkts; u64 oversize_pkts; u64 fragments; u64 jabbers;"
+            " u64 hist[ETHTOOL_RMON_HIST_MAX]; u64"
+            " hist_tx[ETHTOOL_RMON_HIST_MAX]; );"
+        )
+        self._check_matches(line, 2)
+
+    def test_struct_group_09(self):
+        """struct_group(tx_stats)."""
+        line = (
+            "struct_group(tx_stats, u64 pkts; u64 onestep_pkts_unconfirmed;"
+            " u64 lost; u64 err; );"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_10(self):
+        """struct_group(zeroed_on_hw_restart) with a nested struct."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, u16 fw_id; struct { u8"
+            " allocated:1; u8 stop_full:1; } status; ); struct list_head list;"
+            " atomic_t tx_request;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_11(self):
+        """struct_group(zeroed_on_hw_restart) with many fields."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, unsigned int status; u32"
+            " uid_status[IWL_MAX_UMAC_SCANS]; u64 start_tsf; bool"
+            " last_ebs_failed; enum iwl_mld_pass_all_sched_results_states"
+            " pass_all_sched_res; u8 fw_link_id; struct { u32"
+            " last_stats_ts_usec; enum iwl_mld_traffic_load status; }"
+            " traffic_load; );size_t cmd_size; void *cmd; unsigned long"
+            " last_6ghz_passive_jiffies; unsigned long"
+            " last_start_time_jiffies; u64 last_mlo_scan_time;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_12(self):
+        """struct_group(zeroed_on_hw_restart) with a huge struct."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, struct ieee80211_bss_conf "
+            " *fw_id_to_bss_conf[IWL_FW_MAX_LINK_ID + 1]; struct ieee80211_vif"
+            "  *fw_id_to_vif[NUM_MAC_INDEX_DRIVER]; struct ieee80211_txq "
+            " *fw_id_to_txq[IWL_MAX_TVQM_QUEUES]; u8 used_phy_ids:"
+            " NUM_PHY_CTX; u8 num_igtks; struct { bool on; u32 ampdu_ref; bool"
+            " ampdu_toggle; u8 p80; struct { struct"
+            " iwl_rx_phy_air_sniffer_ntfy data; u8 valid:1, used:1; } phy;"
+            " #ifdef CONFIG_IWLWIFI_DEBUGFS; __le16 cur_aid; u8"
+            " cur_bssid[ETH_ALEN]; bool ptp_time; #endif; } monitor; #ifdef"
+            " CONFIG_PM_SLEEP; bool netdetect; #endif; struct ieee80211_vif"
+            " *p2p_device_vif; bool bt_is_active; struct ieee80211_vif"
+            " *nan_device_vif; ); struct ieee80211_link_sta "
+            " *fw_id_to_link_sta[IWL_STATION_COUNT_MAX];struct device *dev;"
+            " struct iwl_trans *trans; const struct iwl_rf_cfg *cfg; const"
+            " struct iwl_fw *fw; struct ieee80211_hw *hw; struct wiphy *wiphy;"
+            " struct wiphy_iftype_ext_capab"
+            " ext_capab[IWL_MLD_EXT_CAPA_NUM_IFTYPES]; u8"
+            " sta_ext_capab[IWL_MLD_STA_EXT_CAPA_SIZE]; struct iwl_nvm_data"
+            " *nvm_data; struct iwl_fw_runtime fwrt; struct dentry"
+            " *debugfs_dir; struct iwl_notif_wait_data notif_wait; struct"
+            " list_head async_handlers_list; spinlock_t async_handlers_lock;"
+            " struct wiphy_work async_handlers_wk; struct wiphy_delayed_work"
+            " ct_kill_exit_wk; struct { u32 running:1, do_not_dump_once:1,"
+            " #ifdef CONFIG_PM_SLEEP; in_d3:1, resuming:1, #endif;"
+            " in_hw_restart:1; } fw_status; struct { u32 hw:1, ct:1; }"
+            " radio_kill; u32 power_budget_mw; struct mac_address"
+            " addresses[IWL_MLD_MAX_ADDRESSES]; struct iwl_mld_scan scan;"
+            " struct iwl_mld_survey *channel_survey; #ifdef CONFIG_PM_SLEEP;"
+            " struct wiphy_wowlan_support wowlan; u32 debug_max_sleep; #endif;"
+            " #ifdef CONFIG_IWLWIFI_LEDS; struct led_classdev led; #endif;"
+            " enum iwl_mcc_source mcc_src; bool bios_enable_puncturing; struct"
+            " iwl_mld_baid_data  *fw_id_to_ba[IWL_MAX_BAID]; u8"
+            " num_rx_ba_sessions; struct iwl_mld_rx_queues_sync rxq_sync;"
+            " struct list_head txqs_to_add; struct wiphy_work add_txqs_wk;"
+            " spinlock_t add_txqs_lock; u8 *error_recovery_buf; struct"
+            " iwl_mcast_filter_cmd *mcast_filter_cmd; u8 mgmt_tx_ant; u8"
+            " set_tx_ant; u8 set_rx_ant; bool fw_rates_ver_3; struct"
+            " iwl_mld_low_latency low_latency; bool ibss_manager; #ifdef"
+            " CONFIG_THERMAL; struct thermal_zone_device *tzone; struct"
+            " iwl_mld_cooling_device cooling_dev; #endif; struct ptp_data"
+            " ptp_data; struct iwl_mld_time_sync_data  *time_sync; struct"
+            " ftm_initiator_data ftm_initiator;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_13(self):
+        """struct_group(zeroed_on_not_authorized)."""
+        line = (
+            "struct_group(zeroed_on_not_authorized, u8 primary; u8"
+            " selected_primary; u16 selected_links; enum iwl_mld_emlsr_blocked"
+            " blocked_reasons; enum iwl_mld_emlsr_exit last_exit_reason;"
+            " unsigned long last_exit_ts; u8 exit_repeat_count; unsigned long"
+            " last_entry_ts; ); struct wiphy_work unblock_tpt_wk; struct"
+            " wiphy_delayed_work check_tpt_wk; struct wiphy_delayed_work"
+            " prevent_done_wk; struct wiphy_delayed_work tmp_non_bss_done_wk;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_14(self):
+        """struct_group(zeroed_on_hw_restart) with nested struct."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, u8 fw_id; struct"
+            " iwl_mld_session_protect session_protect; struct ieee80211_sta"
+            " *ap_sta; bool authorized; u8 num_associated_stas; bool"
+            " ap_ibss_active; enum iwl_mld_cca_40mhz_wa_status"
+            " cca_40mhz_workaround; #ifdef CONFIG_IWLWIFI_DEBUGFS; bool"
+            " beacon_inject_active; #endif; u8 low_latency_causes; bool"
+            " ps_disabled; time64_t last_link_activation_time; );struct"
+            " iwl_mld *mld; struct iwl_mld_link deflink; struct iwl_mld_link "
+            " *link[IEEE80211_MLD_MAX_NUM_LINKS]; struct iwl_mld_emlsr emlsr;"
+            " #ifdef CONFIG_PM_SLEEP; struct iwl_mld_wowlan_data wowlan_data;"
+            " #endif; #ifdef CONFIG_IWLWIFI_DEBUGFS; bool use_ps_poll; bool"
+            " disable_bf; struct dentry *dbgfs_slink; #endif; enum"
+            " iwl_roc_activity roc_activity; struct iwl_mld_int_sta aux_sta;"
+            " struct wiphy_delayed_work mlo_scan_start_wk;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_15(self):
+        """struct_group(zeroed_on_hw_restart) with small struct."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, u32 last_rate_n_flags; bool"
+            " in_fw; s8 signal_avg; );struct rcu_head rcu_head; u32 fw_id;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_16(self):
+        """struct_group(zeroed_on_hw_restart) with many enums."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, enum ieee80211_sta_state"
+            " sta_state; enum iwl_fw_sta_type sta_type; );struct iwl_mld *mld;"
+            " struct ieee80211_vif *vif; struct iwl_mld_rxq_dup_data"
+            " *dup_data; u8 tid_to_baid[IWL_MAX_TID_COUNT]; u8 data_tx_ant;"
+            " struct iwl_mld_link_sta deflink; struct iwl_mld_link_sta "
+            " *link[IEEE80211_MLD_MAX_NUM_LINKS]; struct iwl_mld_ptk_pn "
+            " *ptk_pn[IWL_NUM_DEFAULT_KEYS]; struct iwl_mld_per_q_mpdu_counter"
+            " *mpdu_counters;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_17(self):
+        """struct_group(zeroed_on_hw_restart) with channel data."""
+        line = (
+            "struct_group(zeroed_on_hw_restart, u8 fw_id; struct"
+            " cfg80211_chan_def chandef; );u32 channel_load_by_us; u32"
+            " avg_channel_load_not_by_us; struct iwl_mld *mld;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_18(self):
+        """mixture of struct_group and struct rcu_head."""
+        line = (
+            "struct rcu_head rcu_head;struct_group(zeroed_on_hw_restart, u8"
+            " fw_id; bool active; struct ieee80211_tx_queue_params"
+            " queue_params[IEEE80211_NUM_ACS]; struct ieee80211_chanctx_conf "
+            " *chan_ctx; bool he_ru_2mhz_block; struct ieee80211_key_conf"
+            " *igtk; struct ieee80211_key_conf  *bigtks[2]; );struct"
+            " iwl_mld_int_sta bcast_sta; struct iwl_mld_int_sta mcast_sta;"
+            " struct iwl_mld_int_sta mon_sta;struct ieee80211_key_conf"
+            " *ap_early_keys[6]; u32 average_beacon_energy; bool"
+            " silent_deactivation; struct iwl_probe_resp_data "
+            " *probe_resp_data;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_19(self):
+        """x(ice_health_tx_hang_buf)."""
+        line = (
+            "struct devlink_health_reporter *fw; struct"
+            " devlink_health_reporter *mdd; struct devlink_health_reporter"
+            " *port; struct devlink_health_reporter *tx_hang;"
+            " struct_group_tagged(ice_health_tx_hang_buf, tx_hang_buf, struct"
+            " ice_tx_ring *tx_ring; u32 head; u32 intr; u16 vsi_num; ); struct"
+            " ice_aqc_health_status_elem fw_status; struct"
+            " ice_aqc_health_status_elem port_status;"
+        )
+        self._check_matches(line, 1)
+
+    def test_struct_group_sub(self):
+        """Replace struct_group body with a placeholder."""
+        line = "foo bar struct_group(my, a(b{c}), d); qux;"
+
+        result = NestedMatch(r"\bstruct_group\(").sub("REPLACED", line)
+        expected = "foo bar REPLACED qux;"
+
+        self.assertEqual(result, expected)
+
+
+class TestSubMacros(unittest.TestCase):
+    """
+    Test macros that will be dropped.
+    """
+
+    def test_acquires_simple(self):
+        """Simple replacement test with __acquires"""
+        line = "__acquires(ctx) foo();"
+        result = NestedMatch(r"__acquires\s*\(").sub("REPLACED", line)
+
+        self.assertNotIn("__acquires(", result)
+        self.assertIn("foo();", result)
+
+    def test_acquires_multiple(self):
+        """Multiple __acquires"""
+        line = "__acquires(ctx) __acquires(other) bar();"
+        result = NestedMatch(r"__acquires\s*\(").sub("REPLACED", line)
+
+        self.assertNotIn("__acquires(", result)
+        self.assertEqual(result.count("REPLACED"), 2)
+
+    def test_acquires_nested_paren(self):
+        """__acquires with nested pattern"""
+        line = "__acquires((ctx1, ctx2)) baz();"
+        result = NestedMatch(r"__acquires\s*\(").sub("REPLACED", line)
+
+        self.assertNotIn("__acquires(", result)
+        self.assertIn("baz();", result)
+
+    def test_must_hold(self):
+        """__must_hold with a pointer"""
+        line = "__must_hold(&lock) do_something();"
+        result = NestedMatch(r"__must_hold\s*\(").sub("REPLACED", line)
+
+        self.assertNotIn("__must_hold(", result)
+        self.assertIn("do_something();", result)
+
+    def test_must_hold_shared(self):
+        """__must_hold with an upercase defined value"""
+        line = "__must_hold_shared(RCU) other();"
+        result = NestedMatch(r"__must_hold_shared\s*\(").sub("REPLACED", line)
+
+        self.assertNotIn("__must_hold_shared(", result)
+        self.assertIn("other();", result)
+
+    def test_no_false_positive(self):
+        """
+        Ensure that unrelated text containing similar patterns is preserved
+        """
+        line = "call__acquires(foo);  // should stay intact"
+        result = NestedMatch(r"\b__acquires\s*\(").sub("REPLACED", line)
+
+        self.assertEqual(result, line)
+
+    def test_mixed_macros(self):
+        """Add a mix of macros"""
+        line = "__acquires(ctx) __releases(ctx) __must_hold(&lock) foo();"
+
+        result = NestedMatch(r"__acquires\s*\(").sub("REPLACED", line)
+        result = NestedMatch(r"__releases\s*\(").sub("REPLACED", result)
+        result = NestedMatch(r"__must_hold\s*\(").sub("REPLACED", result)
+
+        self.assertNotIn("__acquires(", result)
+        self.assertNotIn("__releases(", result)
+        self.assertNotIn("__must_hold(", result)
+
+        self.assertIn("foo();", result)
+
+    def test_no_macro_remains(self):
+        """Ensures that unmatched macros are untouched"""
+        line = "do_something_else();"
+        result = NestedMatch(r"__acquires\s*\(").sub("REPLACED", line)
+
+        self.assertEqual(result, line)
+
+
+class TestSubReplacement(unittest.TestCase):
+    """Test argument replacements"""
+
+    @classmethod
+    def setUpClass(cls):
+        """Define a NestedMatch to be used for all tests"""
+        cls.matcher = NestedMatch(re.compile(r"__acquires\s*\("))
+
+    def test_sub_with_capture(self):
+        """Test all arguments replacement with a single arg"""
+        line = "__acquires(&ctx) foo();"
+
+        result = self.matcher.sub(r"ACQUIRED(\0)", line)
+
+        self.assertIn("ACQUIRED(&ctx)", result)
+        self.assertIn("foo();", result)
+
+    def test_sub_zero_placeholder(self):
+        """Test all arguments replacement with a multiple args"""
+        line = "__acquires(arg1, arg2) bar();"
+
+        result = self.matcher.sub(r"REPLACED(\0)", line)
+
+        self.assertIn("bar();", result)
+        self.assertIn("REPLACED(arg1, arg2)", result)
+
+    def test_sub_single_placeholder(self):
+        """Single replacement rule for \1"""
+        line = "__acquires(ctx) foo();"
+        result = self.matcher.sub(r"ACQUIRED(\1)", line)
+
+        self.assertIn("foo();", result)
+        self.assertIn("ACQUIRED(ctx)", result)
+
+    def test_sub_multiple_placeholders(self):
+        """Replacement rule for both \1 and \2"""
+        line = "__acquires(arg1, arg2) bar();"
+        result = self.matcher.sub(r"REPLACE(\1, \2)", line)
+
+        self.assertIn("bar();", result)
+        self.assertIn("REPLACE(arg1, arg2)", result)
+
+    def test_sub_mixed_placeholders(self):
+        """Replacement rule for \0, \1 and additional text"""
+        line = "__acquires(foo, bar) baz();"
+        result = self.matcher.sub(r"START(\0) END(\1)", line)
+
+        self.assertIn("baz();", result)
+        self.assertIn("START(foo, bar) END(foo)", result)
+
+    def test_sub_no_placeholder(self):
+        """Replacement without placeholders"""
+        line = "__acquires(arg) foo();"
+        result = self.matcher.sub(r"NO_BACKREFS()", line)
+
+        self.assertIn("foo();", result)
+        self.assertIn("NO_BACKREFS()", result)
+
+    def test_sub_count_parameter(self):
+        """Verify that the algorithm stops after the requested count"""
+        line = "__acquires(a1) x(); __acquires(a2) y();"
+        result = self.matcher.sub(r"ONLY_FIRST(\1)", line, count=1)
+
+        self.assertIn("ONLY_FIRST(a1) x();", result)
+        self.assertIn("__acquires(a2) y();", result)
+
+
+# ----------------------------------------------------------------------
+# Run all tests
+# ----------------------------------------------------------------------
+if __name__ == "__main__":
+    run_unittest(__file__)
-- 
2.52.0

[PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Mauro Carvalho Chehab]

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/unittest_helper.py | 16 +---------------
 1 file changed, 1 insertion(+), 15 deletions(-)

diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
index e438472fa704..3cf1075b1de4 100755
--- a/tools/lib/python/unittest_helper.py
+++ b/tools/lib/python/unittest_helper.py
@@ -8,21 +8,7 @@
 Helper class to better display unittest results.
 
 Those help functions provide a nice colored output summary of each
-executed test and, when a test fails, it shows the different in diff
-format when running in verbose mode, like::
-
-    $ tools/unittests/nested_match.py -v
-    ...
-    Traceback (most recent call last):
-    File "/new_devel/docs/tools/unittests/nested_match.py", line 69, in test_count_limit
-        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
-        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b); foo(c)'
-    - bar(a) foo(b); foo(c)
-    ?       ^^^^
-    + bar(a); bar(b); foo(c)
-    ?       ^^^^^
-    ...
+executed test.
 
 It also allows filtering what tests will be executed via ``-k`` parameter.
 
-- 
2.52.0

Re: [PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Mauro Carvalho Chehab]

On Wed, 28 Jan 2026 17:50:21 +0100
Mauro Carvalho Chehab <mchehab+huawei@kernel.org> wrote:

> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

This is obviously wrong... it should have been merged with patch 21, after
a cleanup I did on it to remove some dead code.

> ---
>  tools/lib/python/unittest_helper.py | 16 +---------------
>  1 file changed, 1 insertion(+), 15 deletions(-)
> 
> diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
> index e438472fa704..3cf1075b1de4 100755
> --- a/tools/lib/python/unittest_helper.py
> +++ b/tools/lib/python/unittest_helper.py
> @@ -8,21 +8,7 @@
>  Helper class to better display unittest results.
>  
>  Those help functions provide a nice colored output summary of each
> -executed test and, when a test fails, it shows the different in diff
> -format when running in verbose mode, like::
> -
> -    $ tools/unittests/nested_match.py -v
> -    ...
> -    Traceback (most recent call last):
> -    File "/new_devel/docs/tools/unittests/nested_match.py", line 69, in test_count_limit
> -        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
> -        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> -    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b); foo(c)'
> -    - bar(a) foo(b); foo(c)
> -    ?       ^^^^
> -    + bar(a); bar(b); foo(c)
> -    ?       ^^^^^
> -    ...
> +executed test.
>  
>  It also allows filtering what tests will be executed via ``-k`` parameter.
>  



Thanks,
Mauro

RE: [Intel-wired-lan] [PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>; Mauro Carvalho Chehab <mchehab@kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Shuah
> Khan <skhan@linuxfoundation.org>; Stephen Rothwell
> <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 23/25]
> tools/lib/python/unittest_helper.py
> 
Could be nice if you add proper commit title following subsystem: brief description format

> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/unittest_helper.py | 16 +---------------
>  1 file changed, 1 insertion(+), 15 deletions(-)
> 
> diff --git a/tools/lib/python/unittest_helper.py
> b/tools/lib/python/unittest_helper.py
> index e438472fa704..3cf1075b1de4 100755
> --- a/tools/lib/python/unittest_helper.py
> +++ b/tools/lib/python/unittest_helper.py
> @@ -8,21 +8,7 @@
>  Helper class to better display unittest results.
> 
>  Those help functions provide a nice colored output summary of each -
> executed test and, when a test fails, it shows the different in diff -
> format when running in verbose mode, like::
> -
> -    $ tools/unittests/nested_match.py -v
> -    ...
> -    Traceback (most recent call last):
> -    File "/new_devel/docs/tools/unittests/nested_match.py", line 69,
> in test_count_limit
> -        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
> -        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> -    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b);
> foo(c)'
> -    - bar(a) foo(b); foo(c)
> -    ?       ^^^^
> -    + bar(a); bar(b); foo(c)
> -    ?       ^^^^^
> -    ...
> +executed test.
> 
>  It also allows filtering what tests will be executed via ``-k``
> parameter.
> 
> --
> 2.52.0

Re: [Intel-wired-lan] [PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Jacob Keller]

On 1/28/2026 8:50 AM, Mauro Carvalho Chehab wrote:
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---

What is this patch trying to do? the title is not descriptive, and its 
contents don't make sense.

>   tools/lib/python/unittest_helper.py | 16 +---------------
>   1 file changed, 1 insertion(+), 15 deletions(-)
> 
> diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
> index e438472fa704..3cf1075b1de4 100755
> --- a/tools/lib/python/unittest_helper.py
> +++ b/tools/lib/python/unittest_helper.py
> @@ -8,21 +8,7 @@
>   Helper class to better display unittest results.
>   
>   Those help functions provide a nice colored output summary of each
> -executed test and, when a test fails, it shows the different in diff
> -format when running in verbose mode, like::
> -
> -    $ tools/unittests/nested_match.py -v
> -    ...
> -    Traceback (most recent call last):
> -    File "/new_devel/docs/tools/unittests/nested_match.py", line 69, in test_count_limit
> -        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
> -        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> -    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b); foo(c)'
> -    - bar(a) foo(b); foo(c)
> -    ?       ^^^^
> -    + bar(a); bar(b); foo(c)
> -    ?       ^^^^^
> -    ...
> +executed test.
>   

You delete a bunch of the output here, but don't explain why. If this 
part of the doc is no longer valid this should be squashed into whatever 
patch made it invalid. I suspect this is the result of the new wrapper 
you added?

Thanks,
Jake

>   It also allows filtering what tests will be executed via ``-k`` parameter.
>   

Re: [Intel-wired-lan] [PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Mauro Carvalho Chehab]

Hi Jacob,

On Wed, 28 Jan 2026 10:09:18 -0800
Jacob Keller <jacob.e.keller@intel.com> wrote:

> On 1/28/2026 8:50 AM, Mauro Carvalho Chehab wrote:
> > Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> > ---  
> 
> What is this patch trying to do? the title is not descriptive, and its 
> contents don't make sense.
> 
> >   tools/lib/python/unittest_helper.py | 16 +---------------
> >   1 file changed, 1 insertion(+), 15 deletions(-)
> > 
> > diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
> > index e438472fa704..3cf1075b1de4 100755
> > --- a/tools/lib/python/unittest_helper.py
> > +++ b/tools/lib/python/unittest_helper.py
> > @@ -8,21 +8,7 @@
> >   Helper class to better display unittest results.
> >   
> >   Those help functions provide a nice colored output summary of each
> > -executed test and, when a test fails, it shows the different in diff
> > -format when running in verbose mode, like::
> > -
> > -    $ tools/unittests/nested_match.py -v
> > -    ...
> > -    Traceback (most recent call last):
> > -    File "/new_devel/docs/tools/unittests/nested_match.py", line 69, in test_count_limit
> > -        self.assertEqual(replaced, "bar(a); bar(b); foo(c)")
> > -        ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> > -    AssertionError: 'bar(a) foo(b); foo(c)' != 'bar(a); bar(b); foo(c)'
> > -    - bar(a) foo(b); foo(c)
> > -    ?       ^^^^
> > -    + bar(a); bar(b); foo(c)
> > -    ?       ^^^^^
> > -    ...
> > +executed test.
> >     
> 
> You delete a bunch of the output here, but don't explain why. If this 
> part of the doc is no longer valid this should be squashed into whatever 
> patch made it invalid. I suspect this is the result of the new wrapper 
> you added?

This patch came from a tool I wrote about one year ago for my own
personal usage. 

It was meant to be merged with patch 21/25, as it cleans up
the module description. I ended removing a function that was
requiring:

	from difflib import unified_diff

as it was unused, but, a second look at it, I guess we can just
drop this patch, as this is plain unittest output.

Anyway, I'll handle it either way at the next version.

Thanks,
Mauro

Re: [Intel-wired-lan] [PATCH v2 23/25] tools/lib/python/unittest_helper.py

[Jacob Keller]

On 1/28/2026 1:02 PM, Mauro Carvalho Chehab wrote:
> Anyway, I'll handle it either way at the next version.
> 

I also saw you had replied already.. but I hadn't gotten that far in the 
thread yet when reviewing :) Thanks!

> Thanks,
> Mauro

[PATCH v2 24/25] docs: kdoc_parser: better handle struct_group macros

[Mauro Carvalho Chehab]

Instead of converting them on two steps, implement a single
logic to parse them using the new sub functionality of
NestedMatch.sub().

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_parser.py | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/lib/python/kdoc/kdoc_parser.py b/tools/lib/python/kdoc/kdoc_parser.py
index 3a5614106af7..d2eb93f9d489 100644
--- a/tools/lib/python/kdoc/kdoc_parser.py
+++ b/tools/lib/python/kdoc/kdoc_parser.py
@@ -124,10 +124,11 @@ struct_xforms = [
     # matched. So, the implementation to drop STRUCT_GROUP() will be
     # handled in separate.
     #
-    (KernRe(r'\bstruct_group\s*\(([^,]*,)', re.S), r'STRUCT_GROUP('),
-    (KernRe(r'\bstruct_group_attr\s*\(([^,]*,){2}', re.S), r'STRUCT_GROUP('),
-    (KernRe(r'\bstruct_group_tagged\s*\(([^,]*),([^,]*),', re.S), r'struct \1 \2; STRUCT_GROUP('),
-    (KernRe(r'\b__struct_group\s*\(([^,]*,){3}', re.S), r'STRUCT_GROUP('),
+    (NestedMatch(r'\bstruct_group\s*\('), r'\2'),
+    (NestedMatch(r'\bstruct_group_attr\s*\('), r'\3'),
+    (NestedMatch(r'\bstruct_group_tagged\s*\('), r'struct \1 { \3 } \2;'),
+    (NestedMatch(r'\b__struct_group\s*\('), r'\4'),
+
     #
     # Replace macros
     #
@@ -153,7 +154,6 @@ struct_xforms = [
     (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + struct_args_pattern + r'\)', re.S), r'dma_addr_t \1'),
     (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern + r'\)', re.S), r'__u32 \1'),
     (KernRe(r'VIRTIO_DECLARE_FEATURES\(([\w_]+)\)'), r'union { u64 \1; u64 \1_array[VIRTIO_FEATURES_U64S]; }'),
-    (NestedMatch(r'\bSTRUCT_GROUP\('), r'\0'),
 ]
 
 #
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 24/25] docs: kdoc_parser: better handle struct_group macros

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 24/25] docs: kdoc_parser: better
> handle struct_group macros
> 
> Instead of converting them on two steps, implement a single logic to
> parse them using the new sub functionality of NestedMatch.sub().
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_parser.py | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_parser.py
> b/tools/lib/python/kdoc/kdoc_parser.py
> index 3a5614106af7..d2eb93f9d489 100644
> --- a/tools/lib/python/kdoc/kdoc_parser.py
> +++ b/tools/lib/python/kdoc/kdoc_parser.py
> @@ -124,10 +124,11 @@ struct_xforms = [
>      # matched. So, the implementation to drop STRUCT_GROUP() will be
>      # handled in separate.
>      #
> -    (KernRe(r'\bstruct_group\s*\(([^,]*,)', re.S), r'STRUCT_GROUP('),
> -    (KernRe(r'\bstruct_group_attr\s*\(([^,]*,){2}', re.S),
> r'STRUCT_GROUP('),
> -    (KernRe(r'\bstruct_group_tagged\s*\(([^,]*),([^,]*),', re.S),
> r'struct \1 \2; STRUCT_GROUP('),
> -    (KernRe(r'\b__struct_group\s*\(([^,]*,){3}', re.S),
> r'STRUCT_GROUP('),
> +    (NestedMatch(r'\bstruct_group\s*\('), r'\2'),
> +    (NestedMatch(r'\bstruct_group_attr\s*\('), r'\3'),
> +    (NestedMatch(r'\bstruct_group_tagged\s*\('), r'struct \1 { \3 }
> \2;'),
> +    (NestedMatch(r'\b__struct_group\s*\('), r'\4'),
> +
>      #
>      # Replace macros
>      #
> @@ -153,7 +154,6 @@ struct_xforms = [
>      (KernRe(r'DEFINE_DMA_UNMAP_ADDR\s*\(' + struct_args_pattern +
> r'\)', re.S), r'dma_addr_t \1'),
>      (KernRe(r'DEFINE_DMA_UNMAP_LEN\s*\(' + struct_args_pattern +
> r'\)', re.S), r'__u32 \1'),
>      (KernRe(r'VIRTIO_DECLARE_FEATURES\(([\w_]+)\)'), r'union { u64
> \1; u64 \1_array[VIRTIO_FEATURES_U64S]; }'),
> -    (NestedMatch(r'\bSTRUCT_GROUP\('), r'\0'),
>  ]
> 
>  #
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

[PATCH v2 25/25] docs: kdoc_re: fix a parse bug on struct page_pool_params

[Mauro Carvalho Chehab]

The struct page_pool_params definition has a private
definition on it:

    struct page_pool_params {
	struct_group_tagged(page_pool_params_fast, fast,
		unsigned int	order;
		unsigned int	pool_size;
		int		nid;
		struct device	*dev;
		struct napi_struct *napi;
		enum dma_data_direction dma_dir;
		unsigned int	max_len;
		unsigned int	offset;
	);
	struct_group_tagged(page_pool_params_slow, slow,
		struct net_device *netdev;
		unsigned int queue_idx;
		unsigned int	flags;
    /* private: used by test code only */
		void (*init_callback)(netmem_ref netmem, void *arg);
		void *init_arg;
	);
   };

This makes kernel-doc parser to miss the end parenthesis of
the second struct_group_tagged, causing documentation issues.

Address it by ensuring that, if are there anything at the stack,
it will be placed as the last part of the argument.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 tools/lib/python/kdoc/kdoc_re.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/lib/python/kdoc/kdoc_re.py b/tools/lib/python/kdoc/kdoc_re.py
index f49a568b9155..8d4cfdf8f479 100644
--- a/tools/lib/python/kdoc/kdoc_re.py
+++ b/tools/lib/python/kdoc/kdoc_re.py
@@ -206,6 +206,9 @@ class NestedMatch:
         """
 
         stack = []
+        start = 0
+        offset = 0
+        pos = 0
 
         for match_re in self.regex.finditer(line):
             start = match_re.start()
@@ -255,6 +258,11 @@ class NestedMatch:
                         yield start, offset, pos + 1
                         break
 
+        # When /* private */ is used, it may end the end delimiterq
+        if stack:
+            stack.pop()
+            yield start, offset, len(line) + 1
+
     def search(self, line):
         """
         This is similar to re.search:
-- 
2.52.0

RE: [Intel-wired-lan] [PATCH v2 25/25] docs: kdoc_re: fix a parse bug on struct page_pool_params

[Loktionov, Aleksandr]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@osuosl.org> On Behalf
> Of Mauro Carvalho Chehab
> Sent: Wednesday, January 28, 2026 5:50 PM
> To: Jonathan Corbet <corbet@lwn.net>; Linux Doc Mailing List <linux-
> doc@vger.kernel.org>
> Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>;
> bpf@vger.kernel.org; intel-wired-lan@lists.osuosl.org; linux-
> kernel@vger.kernel.org; netdev@vger.kernel.org; Peter Zijlstra
> <peterz@infradead.org>; Randy Dunlap <rdunlap@infradead.org>; Stephen
> Rothwell <sfr@canb.auug.org.au>
> Subject: [Intel-wired-lan] [PATCH v2 25/25] docs: kdoc_re: fix a parse
> bug on struct page_pool_params
> 
> The struct page_pool_params definition has a private definition on it:
> 
>     struct page_pool_params {
> 	struct_group_tagged(page_pool_params_fast, fast,
> 		unsigned int	order;
> 		unsigned int	pool_size;
> 		int		nid;
> 		struct device	*dev;
> 		struct napi_struct *napi;
> 		enum dma_data_direction dma_dir;
> 		unsigned int	max_len;
> 		unsigned int	offset;
> 	);
> 	struct_group_tagged(page_pool_params_slow, slow,
> 		struct net_device *netdev;
> 		unsigned int queue_idx;
> 		unsigned int	flags;
>     /* private: used by test code only */
> 		void (*init_callback)(netmem_ref netmem, void *arg);
> 		void *init_arg;
> 	);
>    };
> 
> This makes kernel-doc parser to miss the end parenthesis of the second
> struct_group_tagged, causing documentation issues.
> 
> Address it by ensuring that, if are there anything at the stack, it
> will be placed as the last part of the argument.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> ---
>  tools/lib/python/kdoc/kdoc_re.py | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/tools/lib/python/kdoc/kdoc_re.py
> b/tools/lib/python/kdoc/kdoc_re.py
> index f49a568b9155..8d4cfdf8f479 100644
> --- a/tools/lib/python/kdoc/kdoc_re.py
> +++ b/tools/lib/python/kdoc/kdoc_re.py
> @@ -206,6 +206,9 @@ class NestedMatch:
>          """
> 
>          stack = []
> +        start = 0
> +        offset = 0
> +        pos = 0
> 
>          for match_re in self.regex.finditer(line):
>              start = match_re.start()
> @@ -255,6 +258,11 @@ class NestedMatch:
>                          yield start, offset, pos + 1
>                          break
> 
> +        # When /* private */ is used, it may end the end delimiterq
> +        if stack:
> +            stack.pop()
> +            yield start, offset, len(line) + 1
> +
>      def search(self, line):
>          """
>          This is similar to re.search:
> --
> 2.52.0
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Jonathan Corbet]

Mauro Carvalho Chehab <mchehab+huawei@kernel.org> writes:

> Hi Jon,
>
> It is impressive how a single patch became a series with 25 ones ;-)

*sigh*

I will try to have a good look at these shortly.  It seems pretty clear
that this isn't 7.0 material at this point, though.

One thing that jumped at me:

> Ah, due to the complexity of NestedMatch, I opted to write
> some unit tests to verify that the logic there is correct.
> We can use it to add other border cases.
>
> Using it is as easy as running:
>
> 	$ tools/unittests/nested_match.py
>
> (I opted to create a separate directory for it, as this
> is not really documentation)

Do we really need another unit-testing setup in the kernel?  I can't say
I'm familiar enough with kunit to say whether it would work for
non-kernel code; have you looked and verified that it isn't suitable?

Thanks,

jon

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Jacob Keller]

On 1/28/2026 9:27 AM, Jonathan Corbet wrote:
> Mauro Carvalho Chehab <mchehab+huawei@kernel.org> writes:
> 
>> Hi Jon,
>>
>> It is impressive how a single patch became a series with 25 ones ;-)
> 
> *sigh*
> 

Splitting things up helped me understand all the changes at least :)

> I will try to have a good look at these shortly.  It seems pretty clear
> that this isn't 7.0 material at this point, though.
> 
> One thing that jumped at me:
> 
>> Ah, due to the complexity of NestedMatch, I opted to write
>> some unit tests to verify that the logic there is correct.
>> We can use it to add other border cases.
>>
>> Using it is as easy as running:
>>
>> 	$ tools/unittests/nested_match.py
>>
>> (I opted to create a separate directory for it, as this
>> is not really documentation)
> 
> Do we really need another unit-testing setup in the kernel?  I can't say
> I'm familiar enough with kunit to say whether it would work for
> non-kernel code; have you looked and verified that it isn't suitable?
> 

I'm not sure kunit would be suitable here, since its meant for running 
kernel code and does a lot of stuff to make that possible. It might be 
able to be extended, but.. this is python code. Why *shouldn't* we use 
one of the python unit test frameworks for it?

We have other python code in tree. Does any of that code have unit tests?

I agree that it doesn't make sense to build new bespoke unit tests 
different or unique per each python module, so if we want to adopt 
python unit tests we should try to pick something that works for the 
python tools in the kernel.

Perhaps finding a way to integrate this with kunit so that you can use 
"kunit run" and get python tests executed as well would make sense? 
But.. then again this isn't kernel code so I'm not sure it makes sense 
to conflate the tests with kernel unit tests.

> Thanks,
> 
> jon
> 

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Mauro Carvalho Chehab]

On Wed, 28 Jan 2026 10:15:51 -0800
Jacob Keller <jacob.e.keller@intel.com> wrote:

> On 1/28/2026 9:27 AM, Jonathan Corbet wrote:
> > Mauro Carvalho Chehab <mchehab+huawei@kernel.org> writes:
> >   
> >> Hi Jon,
> >>
> >> It is impressive how a single patch became a series with 25 ones ;-)  
> > 
> > *sigh*
> >   
> 
> Splitting things up helped me understand all the changes at least :)
> 
> > I will try to have a good look at these shortly.  It seems pretty clear
> > that this isn't 7.0 material at this point, though.
> > 
> > One thing that jumped at me:
> >   
> >> Ah, due to the complexity of NestedMatch, I opted to write
> >> some unit tests to verify that the logic there is correct.
> >> We can use it to add other border cases.
> >>
> >> Using it is as easy as running:
> >>
> >> 	$ tools/unittests/nested_match.py
> >>
> >> (I opted to create a separate directory for it, as this
> >> is not really documentation)  
> > 
> > Do we really need another unit-testing setup in the kernel?  I can't say
> > I'm familiar enough with kunit to say whether it would work for
> > non-kernel code; have you looked and verified that it isn't suitable?
> >   
> 
> I'm not sure kunit would be suitable here, since its meant for running 
> kernel code and does a lot of stuff to make that possible. It might be 
> able to be extended, but.. this is python code. Why *shouldn't* we use 
> one of the python unit test frameworks for it?

This is not using kunit. It is using standard "import unittest" from
Python internal lib.

> We have other python code in tree. Does any of that code have unit tests?

Good question. On a quick grep, it sounds so:

	$ git grep "import unittest" tools scripts
	scripts/rust_is_available_test.py:import unittest
	tools/crypto/ccp/test_dbc.py:import unittest
	tools/perf/pmu-events/metric_test.py:import unittest
	tools/testing/kunit/kunit_tool_test.py:import unittest
	tools/testing/selftests/bpf/test_bpftool.py:import unittest
	tools/testing/selftests/tpm2/tpm2.py:import unittest
	tools/testing/selftests/tpm2/tpm2_tests.py:import unittest

> I agree that it doesn't make sense to build new bespoke unit tests 
> different or unique per each python module, so if we want to adopt 
> python unit tests we should try to pick something that works for the 
> python tools in the kernel.
> 
> Perhaps finding a way to integrate this with kunit so that you can use 
> "kunit run" and get python tests executed as well would make sense? 
> But.. then again this isn't kernel code so I'm not sure it makes sense 
> to conflate the tests with kernel unit tests.

It shouldn't be hard to add it there - or to have a separate script
to run python unittests.

Assuming that we place all unittests at the same directory
(tools/unittests), the enclosed path will run all of them
altogether:

	$ tools/unittests/run.py
	Ran 35 tests in 0.001s

	OK
	nested_match:
	    TestStructGroup:
	        test_struct_group_01:            OK
	        test_struct_group_02:            OK
	        test_struct_group_03:            OK
	        test_struct_group_04:            OK
	        test_struct_group_05:            OK
	        test_struct_group_06:            OK
	        test_struct_group_07:            OK
	        test_struct_group_08:            OK
	        test_struct_group_09:            OK
	        test_struct_group_10:            OK
	        test_struct_group_11:            OK
        	test_struct_group_12:            OK
	        test_struct_group_13:            OK
	        test_struct_group_14:            OK
	        test_struct_group_15:            OK
	        test_struct_group_16:            OK
	        test_struct_group_17:            OK
	        test_struct_group_18:            OK
	        test_struct_group_19:            OK
	        test_struct_group_sub:           OK
	    TestSubMacros:
	        test_acquires_multiple:          OK
        	test_acquires_nested_paren:      OK
	        test_acquires_simple:            OK
        	test_mixed_macros:               OK
	        test_must_hold:                  OK
        	test_must_hold_shared:           OK
	        test_no_false_positive:          OK
	        test_no_macro_remains:           OK
	    TestSubReplacement:
	        test_sub_count_parameter:        OK
	        test_sub_mixed_placeholders:     OK
	        test_sub_multiple_placeholders:  OK
	        test_sub_no_placeholder:         OK
	        test_sub_single_placeholder:     OK
	        test_sub_with_capture:           OK
	        test_sub_zero_placeholder:       OK


	Ran 35 tests

And the helper will also provide an argparse to allow filtering
tests, change verbosity and filtering them with a regex:

	$ tools/unittests/run.py --help
	usage: run.py [-h] [-v] [-f] [-k KEYWORD]

	Test runner with regex filtering

	options:
	  -h, --help            show this help message and exit
	  -v, --verbose
	  -f, --failfast
	  -k, --keyword KEYWORD
	                        Regex pattern to filter test methods

That's said, some integration with kunit can be interesting
to have it producing a KTAP output if needed by some CI.

---

[PATCH] [RFC] Run all tests from tools/unittests

This small example runs all unittests from tools/unittests with:

    $ tools/unittests/run.py

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/tools/lib/python/unittest_helper.py b/tools/lib/python/unittest_helper.py
index 3cf1075b1de4..af16acc3af17 100755
--- a/tools/lib/python/unittest_helper.py
+++ b/tools/lib/python/unittest_helper.py
@@ -213,7 +213,7 @@ class TestUnits:
                             help="Regex pattern to filter test methods")
         return parser
 
-    def run(self, caller_file, parser=None, args=None, env=None):
+    def run(self, caller_file, suite=None, parser=None, args=None, env=None):
         """Execute all tests from the unity test file"""
         if not args:
             if not parser:
@@ -232,9 +232,10 @@ class TestUnits:
             unittest.TextTestRunner(verbosity=verbose).run = lambda suite: suite
 
         # Load ONLY tests from the calling file
-        loader = unittest.TestLoader()
-        suite = loader.discover(start_dir=os.path.dirname(caller_file),
-                                pattern=os.path.basename(caller_file))
+        if not suite:
+            loader = unittest.TestLoader()
+            suite = loader.discover(start_dir=os.path.dirname(caller_file),
+                                    pattern=os.path.basename(caller_file))
 
         # Flatten the suite for environment injection
         tests_to_inject = flatten_suite(suite)
diff --git a/tools/unittests/run.py b/tools/unittests/run.py
new file mode 100755
index 000000000000..2a5a754219de
--- /dev/null
+++ b/tools/unittests/run.py
@@ -0,0 +1,17 @@
+#!/bin/env python3
+import os
+import unittest
+import sys
+
+TOOLS_DIR=os.path.join(os.path.dirname(os.path.realpath(__file__)), "..")
+sys.path.insert(0, TOOLS_DIR)
+
+from lib.python.unittest_helper import TestUnits
+
+if __name__ == "__main__":
+    loader = unittest.TestLoader()
+
+    suite = loader.discover(start_dir=os.path.join(TOOLS_DIR, "unittests"),
+                            pattern="*.py")
+
+    TestUnits().run("", suite=suite)

Thanks,
Mauro

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Jacob Keller]

On 1/28/2026 2:00 PM, Mauro Carvalho Chehab wrote:
> On Wed, 28 Jan 2026 10:15:51 -0800
> Jacob Keller <jacob.e.keller@intel.com> wrote:
>> On 1/28/2026 9:27 AM, Jonathan Corbet wrote:
>>> Do we really need another unit-testing setup in the kernel?  I can't say
>>> I'm familiar enough with kunit to say whether it would work for
>>> non-kernel code; have you looked and verified that it isn't suitable?
>>>    
>>
>> I'm not sure kunit would be suitable here, since its meant for running
>> kernel code and does a lot of stuff to make that possible. It might be
>> able to be extended, but.. this is python code. Why *shouldn't* we use
>> one of the python unit test frameworks for it?
> 
> This is not using kunit. It is using standard "import unittest" from
> Python internal lib.
> 

Right. I think it makes perfect sense to use unittest for python files. 
That was the point of my reply above :D

>> We have other python code in tree. Does any of that code have unit tests?
> 
> Good question. On a quick grep, it sounds so:
> 
> 	$ git grep "import unittest" tools scripts
> 	scripts/rust_is_available_test.py:import unittest
> 	tools/crypto/ccp/test_dbc.py:import unittest
> 	tools/perf/pmu-events/metric_test.py:import unittest
> 	tools/testing/kunit/kunit_tool_test.py:import unittest
> 	tools/testing/selftests/bpf/test_bpftool.py:import unittest
> 	tools/testing/selftests/tpm2/tpm2.py:import unittest
> 	tools/testing/selftests/tpm2/tpm2_tests.py:import unittest
> 
>> I agree that it doesn't make sense to build new bespoke unit tests
>> different or unique per each python module, so if we want to adopt
>> python unit tests we should try to pick something that works for the
>> python tools in the kernel.
>>
>> Perhaps finding a way to integrate this with kunit so that you can use
>> "kunit run" and get python tests executed as well would make sense?
>> But.. then again this isn't kernel code so I'm not sure it makes sense
>> to conflate the tests with kernel unit tests.
> 
> It shouldn't be hard to add it there - or to have a separate script
> to run python unittests.
> 

Right. Some way to have all unit tests run is nice so that its easy to 
hook up into various CI processes. Sounds like you have a solid idea on 
that.

> That's said, some integration with kunit can be interesting
> to have it producing a KTAP output if needed by some CI.
> 
That could also be interesting, as it would make it easier for other 
tooling to work with all the tests.

Personally I am not sure how useful that would be vs just making use of 
the unittest stuff provided as-is with python.

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Mauro Carvalho Chehab]

On Wed, 28 Jan 2026 14:08:50 -0800
Jacob Keller <jacob.e.keller@intel.com> wrote:

> On 1/28/2026 2:00 PM, Mauro Carvalho Chehab wrote:
> > On Wed, 28 Jan 2026 10:15:51 -0800
> > Jacob Keller <jacob.e.keller@intel.com> wrote:  
> >> On 1/28/2026 9:27 AM, Jonathan Corbet wrote:  
> >>> Do we really need another unit-testing setup in the kernel?  I can't say
> >>> I'm familiar enough with kunit to say whether it would work for
> >>> non-kernel code; have you looked and verified that it isn't suitable?
> >>>      
> >>
> >> I'm not sure kunit would be suitable here, since its meant for running
> >> kernel code and does a lot of stuff to make that possible. It might be
> >> able to be extended, but.. this is python code. Why *shouldn't* we use
> >> one of the python unit test frameworks for it?  
> > 
> > This is not using kunit. It is using standard "import unittest" from
> > Python internal lib.
> >   
> 
> Right. I think it makes perfect sense to use unittest for python files. 
> That was the point of my reply above :D
> 
> >> We have other python code in tree. Does any of that code have unit tests?  
> > 
> > Good question. On a quick grep, it sounds so:
> > 
> > 	$ git grep "import unittest" tools scripts
> > 	scripts/rust_is_available_test.py:import unittest
> > 	tools/crypto/ccp/test_dbc.py:import unittest
> > 	tools/perf/pmu-events/metric_test.py:import unittest
> > 	tools/testing/kunit/kunit_tool_test.py:import unittest
> > 	tools/testing/selftests/bpf/test_bpftool.py:import unittest
> > 	tools/testing/selftests/tpm2/tpm2.py:import unittest
> > 	tools/testing/selftests/tpm2/tpm2_tests.py:import unittest
> >   
> >> I agree that it doesn't make sense to build new bespoke unit tests
> >> different or unique per each python module, so if we want to adopt
> >> python unit tests we should try to pick something that works for the
> >> python tools in the kernel.
> >>
> >> Perhaps finding a way to integrate this with kunit so that you can use
> >> "kunit run" and get python tests executed as well would make sense?
> >> But.. then again this isn't kernel code so I'm not sure it makes sense
> >> to conflate the tests with kernel unit tests.  
> > 
> > It shouldn't be hard to add it there - or to have a separate script
> > to run python unittests.
> >   
> 
> Right. Some way to have all unit tests run is nice so that its easy to 
> hook up into various CI processes. Sounds like you have a solid idea on 
> that.
> 
> > That's said, some integration with kunit can be interesting
> > to have it producing a KTAP output if needed by some CI.
> >   
> That could also be interesting, as it would make it easier for other 
> tooling to work with all the tests.
> 
> Personally I am not sure how useful that would be vs just making use of 
> the unittest stuff provided as-is with python.

I'd say that, for now, we don't need a KTAP output, but as things go
more complex and more parts of the tools get unittests added, it 
could make sense to add it.

Adding proper support for it shouldn't be hard with the definitions
inside unittest_helper. All we need to do would be to write a new
inherited class from unittest.TestResult, placing there a 
printResults() method that would generate the KTAP format. We may
add a new "--ktap" argparse argument that, if enabled, it would
use the newer class instead of the Summary class.

Thanks,
Mauro

Re: [PATCH v2 00/25] kernel-doc: make it parse new functions and structs

[Mauro Carvalho Chehab]

On Wed, 28 Jan 2026 10:27:58 -0700
Jonathan Corbet <corbet@lwn.net> wrote:

> Mauro Carvalho Chehab <mchehab+huawei@kernel.org> writes:
> 
> > Hi Jon,
> >
> > It is impressive how a single patch became a series with 25 ones ;-)  
> 
> *sigh*
> 
> I will try to have a good look at these shortly.  It seems pretty clear
> that this isn't 7.0 material at this point, though.

I ended missing your e-mail...

Yeah, it is too late for 7.0.

> 
> One thing that jumped at me:
> 
> > Ah, due to the complexity of NestedMatch, I opted to write
> > some unit tests to verify that the logic there is correct.
> > We can use it to add other border cases.
> >
> > Using it is as easy as running:
> >
> > 	$ tools/unittests/nested_match.py
> >
> > (I opted to create a separate directory for it, as this
> > is not really documentation)  
> 
> Do we really need another unit-testing setup in the kernel?  I can't say
> I'm familiar enough with kunit to say whether it would work for
> non-kernel code; have you looked and verified that it isn't suitable?

I'm familiar with kunit: I wrote myself a bunch of tests using
it for some DRM stuff.

Kunit is focused on testing kernel content. It basically adds
a way for a python script to run self-test logic inside a kernel 
module. It is not meant to test things outside the Kernel.

Also, I'm using the python internal library for it. The only
"fancy" thing I added is a helper module to better work with
unit tests:

- it formats unittest output;
- it passes some parameters to the unittest discover to make
  it more useable;
- it adds argparse parameters to filter tests and control their
  verbosity levels;
- it adds a way to pass argparse values to the tests, as
  some tests may require parameters (like passing a different
  yaml file to a dynamically-generated unit test).

- 

Anyway, I intend to send a new version of this series either
later this week or at the next one.

I'll probably split the unittest part from the part meant to
avoid new warnings after merging from linux-next.

-- 
Thanks,
Mauro