[PATCH 32/57] s390: include/asm/debug.h add kerneldoc markups

Mauro Carvalho Chehab
2019-04-16T03:02:59Z

Instead of keeping the documentation inside s390dbf.txt,
move them to arch/s390/include/asm/debug.h, using standard
kernel-doc markups.

Those were converted to kerneldoc using this specially made
script and manually editted:


use strict;

my $mode = "";
my $parameter = "";
my $ret = "";
my $descr = "";

sub add_var($)
{
my $ln = shift;

$ln =~ s/^\s+//;
$ln =~ s/\s+$//;

return if ($ln eq "");

$ln =~ s/^(\S+)\s+/$1\t/;

print " * \@$ln\n";
}

sub add_return($)
{
my $ln = shift;

print " *\n * Return:\n" if ($mode ne "Return Value:");

$ln =~ s/^\s+//;
$ln =~ s/\s+$//;

return if ($ln eq "");

print " * - $ln\n";
}

sub add_description($)
{
my $ln = shift;

print " *\n * \n" if ($mode ne "Description:");

$ln =~ s/^\s+//;
$ln =~ s/\s+$//;

return if ($ln eq "");

print " * $ln\n";
}

sub flush_results()
{
print " */\n\n";
}

while (<>) {
if (m/^[\-]+$/) {
flush_results();
$mode = "";
$parameter = "";
$ret = "";
$descr = "";
next;
}
if (m/(Parameter:)(.*)/) {
print " *\n" if ($mode eq "func");
add_var($2);
$mode = $1;
next;
}
if (m/(Return Value:)(.*)/) {
add_return($2);
$mode = $1;
next;
}
if (m/(Description:)(.*)/) {
add_description($2);
$mode = $1;
next;
}
if ($mode eq "Parameter:") {
add_var($_);
next;
}
if ($mode eq "Return Value:") {
add_return($_);
next;
}
if ($mode eq "Description:") {
add_description($_);
next;
}
next if (m/^\s*$/);

if (m/^\S+.*\s\*?(\S+)\s*\(/) {
if ($mode eq "") {
print "/**\n * $1()\n";
} else {
print " * $1()\n";
}
$mode="func";
}
}
flush_results();


Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
---
Documentation/s390/s390dbf.txt | 322 +--------------------------------
arch/s390/include/asm/debug.h | 231 +++++++++++++++++++++++
2 files changed, 232 insertions(+), 321 deletions(-)

diff --git a/Documentation/s390/s390dbf.txt b/Documentation/s390/s390dbf.txt
index 549dba50fc3b..b0ca0d142ea1 100644
--- a/Documentation/s390/s390dbf.txt
+++ b/Documentation/s390/s390dbf.txt
@@ -107,327 +107,7 @@ will stay deactivated.
Kernel Interfaces:
------------------

-----------------------------------------------------------------------------
-
-::
-
- debug_info_t *debug_register(char *name, int pages, int nr_areas,
- int buf_size);
-
-Parameter:
- name:
- Name of debug log (e.g. used for debugfs entry)
- pages:
- Number of pages, which will be allocated per area
- nr_areas:
- Number of debug areas
- buf_size:
- Size of data area in each debug entry
-
-Return Value:
- Handle for generated debug area
-
- NULL if register failed
-
-Description: Allocates memory for a debug log
- Must not be called within an interrupt handler
-
-----------------------------------------------------------------------------
-
-::
-
- debug_info_t *debug_register_mode(char *name, int pages, int nr_areas,
- int buf_size, mode_t mode, uid_t uid,
- gid_t gid);
-
-Parameter:
- name:
- Name of debug log (e.g. used for debugfs entry)
- pages:
- Number of pages, which will be allocated per area
- nr_areas:
- Number of debug areas
- buf_size:
- Size of data area in each debug entry
- mode:
- File mode for debugfs files. E.g. S_IRWXUGO
- uid:
- User ID for debugfs files. Currently only 0 is
- supported.
- gid:
- Group ID for debugfs files. Currently only 0 is
- supported.
-
-Return Value:
- Handle for generated debug area
-
- NULL if register failed
-
-Description:
- Allocates memory for a debug log
- Must not be called within an interrupt handler
-
----------------------------------------------------------------------------
-
-::
-
- void debug_unregister (debug_info_t * id);
-
-Parameter:
- id:
- handle for debug log
-
-Return Value:
- none
-
-Description:
- frees memory for a debug log and removes all registered debug
- views.
-
- Must not be called within an interrupt handler
-
----------------------------------------------------------------------------
-
-::
-
- void debug_set_level (debug_info_t * id, int new_level);
-
-Parameter: id: handle for debug log
- new_level: new debug level
-
-Return Value:
- none
-
-Description:
- Sets new actual debug level if new_level is valid.
-
----------------------------------------------------------------------------
-
-::
-
- bool debug_level_enabled (debug_info_t * id, int level);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
-
-Return Value:
- True if level is less or equal to the current debug level.
-
-Description:
- Returns true if debug events for the specified level would be
- logged. Otherwise returns false.
-
----------------------------------------------------------------------------
-
-::
-
- void debug_stop_all(void);
-
-Parameter:
- none
-
-Return Value:
- none
-
-Description:
- stops the debug feature if stopping is allowed. Currently
- used in case of a kernel oops.
-
----------------------------------------------------------------------------
-
-::
-
- debug_entry_t* debug_event (debug_info_t* id, int level, void* data,
- int length);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
- data:
- pointer to data for debug entry
- length:
- length of data in bytes
-
-Return Value:
- Address of written debug entry
-
-Description:
- writes debug entry to active debug area (if level <= actual
- debug level)
-
----------------------------------------------------------------------------
-
-::
-
- debug_entry_t* debug_int_event (debug_info_t * id, int level,
- unsigned int data);
- debug_entry_t* debug_long_event(debug_info_t * id, int level,
- unsigned long data);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
- data:
- integer value for debug entry
-
-Return Value:
- Address of written debug entry
-
-Description:
- writes debug entry to active debug area (if level <= actual
- debug level)
-
----------------------------------------------------------------------------
-
-::
-
- debug_entry_t* debug_text_event (debug_info_t * id, int level,
- const char* data);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
- data:
- string for debug entry
-
-Return Value:
- Address of written debug entry
-
-Description:
- writes debug entry in ascii format to active debug area
- (if level <= actual debug level)
-
----------------------------------------------------------------------------
-
-::
-
- debug_entry_t* debug_sprintf_event (debug_info_t * id, int level,
- char* string,...);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
- string:
- format string for debug entry
- ...:
- varargs used as in sprintf()
-
-Return Value: Address of written debug entry
-
-Description:
- writes debug entry with format string and varargs (longs) to
- active debug area (if level $<=$ actual debug level).
- floats and long long datatypes cannot be used as varargs.
-
----------------------------------------------------------------------------
-
-::
-
- debug_entry_t* debug_exception (debug_info_t* id, int level, void* data,
- int length);
-
-Parameter:
- id:
- handle for debug log
- level:
- debug level
- data:
- pointer to data for debug entry
- length:
- length of data in bytes
-
-Return Value:
- Address of written debug entry
-
-Description:
- writes debug entry to active debug area (if level <= actual
- debug level) and switches to next debug area
-
----------------------------------------------------------------------------
-
-::
- debug_entry_t* debug_int_exception (debug_info_t * id, int level,
- unsigned int data);
- debug_entry_t* debug_long_exception(debug_info_t * id, int level,
- unsigned long data);
-
-Parameter: id: handle for debug log
- level: debug level
- data: integer value for debug entry
-
-Return Value: Address of written debug entry
-
-Description: writes debug entry to active debug area (if level <= actual
- debug level) and switches to next debug area
-
----------------------------------------------------------------------------
-
-debug_entry_t* debug_text_exception (debug_info_t * id, int level,
- const char* data);
-
-Parameter: id: handle for debug log
- level: debug level
- data: string for debug entry
-
-Return Value: Address of written debug entry
-
-Description: writes debug entry in ascii format to active debug area
- (if level <= actual debug level) and switches to next debug
- area
-
----------------------------------------------------------------------------
-
-debug_entry_t* debug_sprintf_exception (debug_info_t * id, int level,
- char* string,...);
-
-Parameter: id: handle for debug log
- level: debug level
- string: format string for debug entry
- ...: varargs used as in sprintf()
-
-Return Value: Address of written debug entry
-
-Description: writes debug entry with format string and varargs (longs) to
- active debug area (if level $<=$ actual debug level) and
- switches to next debug area.
- floats and long long datatypes cannot be used as varargs.
-
----------------------------------------------------------------------------
-
-int debug_register_view (debug_info_t * id, struct debug_view *view);
-
-Parameter: id: handle for debug log
- view: pointer to debug view struct
-
-Return Value: 0 : ok
- < 0: Error
-
-Description: registers new debug view and creates debugfs dir entry
-
----------------------------------------------------------------------------
-
-int debug_unregister_view (debug_info_t * id, struct debug_view *view);
-
-Parameter: id: handle for debug log
- view: pointer to debug view struct
-
-Return Value: 0 : ok
- < 0: Error
-
-Description: unregisters debug view and removes debugfs dir entry
-
-
+.. kernel-doc:: arch/s390/include/asm/debug.h

Predefined views:
-----------------
diff --git a/arch/s390/include/asm/debug.h b/arch/s390/include/asm/debug.h
index c305d39f5016..7cc83938c659 100644
--- a/arch/s390/include/asm/debug.h
+++ b/arch/s390/include/asm/debug.h
@@ -95,25 +95,106 @@ debug_entry_t *debug_exception_common(debug_info_t *id, int level,

/* Debug Feature API: */

+/**
+ * debug_register() - allocates memory for a debug log.
+ *
+ * @name: Name of debug log (e.g. used for debugfs entry)
+ * @pages: Number of pages, which will be allocated per area
+ * @nr_areas: Number of debug areas
+ * @buf_size: Size of data area in each debug entry
+ *
+ * Return:
+ * - Handler for generated debug area
+ * - %NULL if register failed
+ *
+ * Must not be called within an interrupt handler.
+ */
debug_info_t *debug_register(const char *name, int pages, int nr_areas,
int buf_size);

+/**
+ * debug_register_mode() - allocates memory for a debug log.
+ *
+ * @name: Name of debug log (e.g. used for debugfs entry)
+ * @pages: Number of pages, which will be allocated per area
+ * @nr_areas: Number of debug areas
+ * @buf_size: Size of data area in each debug entry
+ * @mode: File mode for debugfs files. E.g. S_IRWXUGO
+ * @uid: User ID for debugfs files. Currently only 0 is supported.
+ * @gid: Group ID for debugfs files. Currently only 0 is supported.
+ *
+ * Return:
+ * - Handler for generated debug area
+ * - %NULL if register failed
+ *
+ * Must not be called within an interrupt handler
+ */
debug_info_t *debug_register_mode(const char *name, int pages, int nr_areas,
int buf_size, umode_t mode, uid_t uid,
gid_t gid);

+/**
+ * debug_unregister() - frees memory for a debug log and removes all
+ * registered debug
+ * views.
+ *
+ * @id: handle for debug log
+ *
+ * Return:
+ * none
+ *
+ * Must not be called within an interrupt handler
+ */
void debug_unregister(debug_info_t *id);

+/**
+ * debug_set_level() - Sets new actual debug level if new_level is valid.
+ *
+ * @id: handle for debug log
+ * @new_level: new debug level
+ *
+ * Return:
+ * none
+ */
void debug_set_level(debug_info_t *id, int new_level);

void debug_set_critical(void);
+
+/**
+ * debug_stop_all() - stops the debug feature if stopping is allowed.
+ *
+ * Return:
+ * - none
+ */
void debug_stop_all(void);

+/**
+ * debug_level_enabled() - Returns true if debug events for the specified
+ * level would be logged. Otherwise returns false.
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ *
+ * Return:
+ * - %true if level is less or equal to the current debug level.
+ */
static inline bool debug_level_enabled(debug_info_t *id, int level)
{
return level <= id->level;
}

+/**
+ * debug_event() - writes debug entry to active debug area
+ * (if level <= actual debug level)
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @data: pointer to data for debug entry
+ * @length: length of data in bytes
+ *
+ * Return:
+ * - Address of written debug entry
+ */
static inline debug_entry_t *debug_event(debug_info_t *id, int level,
void *data, int length)
{
@@ -122,6 +203,18 @@ static inline debug_entry_t *debug_event(debug_info_t *id, int level,
return debug_event_common(id, level, data, length);
}

+/**
+ * debug_int_event() - writes debug entry to active debug area
+ * (if level <= actual debug level)
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @tag: integer value for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_int_event(debug_info_t *id, int level,
unsigned int tag)
{
@@ -132,6 +225,18 @@ static inline debug_entry_t *debug_int_event(debug_info_t *id, int level,
return debug_event_common(id, level, &t, sizeof(unsigned int));
}

+/**
+ * debug_long_event() - writes debug entry to active debug area
+ * (if level <= actual debug level)
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @tag: integer value for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_long_event(debug_info_t *id, int level,
unsigned long tag)
{
@@ -142,6 +247,18 @@ static inline debug_entry_t *debug_long_event(debug_info_t *id, int level,
return debug_event_common(id, level, &t, sizeof(unsigned long));
}

+/**
+ * debug_text_event() - writes debug entry in ascii format to active
+ * debug area (if level <= actual debug level)
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @txt: string for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_text_event(debug_info_t *id, int level,
const char *txt)
{
@@ -158,6 +275,22 @@ extern debug_entry_t *
__debug_sprintf_event(debug_info_t *id, int level, char *string, ...)
__attribute__ ((format(printf, 3, 4)));

+/**
+ * debug_sprintf_event() - writes debug entry with format string
+ * and varargs (longs) to active debug area
+ * (if level $<=$ actual debug level).
+ *
+ * @_id: handle for debug log
+ * @_level: debug level
+ * @_fmt: format string for debug entry
+ * @...: varargs used as in sprintf()
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ *
+ * floats and long long datatypes cannot be used as varargs.
+ */
#define debug_sprintf_event(_id, _level, _fmt, ...) \
({ \
debug_entry_t *__ret; \
@@ -172,6 +305,20 @@ __debug_sprintf_event(debug_info_t *id, int level, char *string, ...)
__ret; \
})

+/**
+ * debug_exception() - writes debug entry to active debug area
+ * (if level <= actual debug level) and switches
+ * to next debug area
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @data: pointer to data for debug entry
+ * @length: length of data in bytes
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_exception(debug_info_t *id, int level,
void *data, int length)
{
@@ -180,6 +327,19 @@ static inline debug_entry_t *debug_exception(debug_info_t *id, int level,
return debug_exception_common(id, level, data, length);
}

+/**
+ * debug_int_exception() - writes debug entry to active debug area
+ * (if level <= actual debug level)
+ * and switches to next debug area
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @tag: integer value for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_int_exception(debug_info_t *id, int level,
unsigned int tag)
{
@@ -190,6 +350,19 @@ static inline debug_entry_t *debug_int_exception(debug_info_t *id, int level,
return debug_exception_common(id, level, &t, sizeof(unsigned int));
}

+/**
+ * debug_long_exception() - writes debug entry to active debug area
+ * (if level <= actual debug level)
+ * and switches to next debug area
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @tag: integer value for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_long_exception (debug_info_t *id, int level,
unsigned long tag)
{
@@ -200,6 +373,20 @@ static inline debug_entry_t *debug_long_exception (debug_info_t *id, int level,
return debug_exception_common(id, level, &t, sizeof(unsigned long));
}

+/**
+ * debug_text_exception() - writes debug entry in ascii format to active
+ * debug area (if level <= actual debug level)
+ * and switches to next debug
+ * area
+ *
+ * @id: handle for debug log
+ * @level: debug level
+ * @txt: string for debug entry
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ */
static inline debug_entry_t *debug_text_exception(debug_info_t *id, int level,
const char *txt)
{
@@ -216,6 +403,24 @@ extern debug_entry_t *
__debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)
__attribute__ ((format(printf, 3, 4)));

+
+/**
+ * debug_sprintf_exception() - writes debug entry with format string and
+ * varargs (longs) to active debug area
+ * (if level $<=$ actual debug level)
+ * and switches to next debug area.
+ *
+ * @_id: handle for debug log
+ * @_level: debug level
+ * @_fmt: format string for debug entry
+ * @...: varargs used as in sprintf()
+ *
+ * Return:
+ * - Address of written debug entry
+ * - %NULL if error
+ *
+ * floats and long long datatypes cannot be used as varargs.
+ */
#define debug_sprintf_exception(_id, _level, _fmt, ...) \
({ \
debug_entry_t *__ret; \
@@ -230,7 +435,33 @@ __debug_sprintf_exception(debug_info_t *id, int level, char *string, ...)
__ret; \
})

+/**
+ * debug_register_view() - registers new debug view and creates debugfs
+ * dir entry
+ *
+ * @id: handle for debug log
+ * @view: pointer to debug view struct
+ *
+ * Return:
+ * - 0 : ok
+ * - < 0: Error
+ */
int debug_register_view(debug_info_t *id, struct debug_view *view);
+
+/**
+ * debug_unregister_view()
+ *
+ * @id: handle for debug log
+ * @view: pointer to debug view struct
+ *
+ * Return:
+ * - 0 : ok
+ * - < 0: Error
+ *
+ *
+ * unregisters debug view and removes debugfs dir entry
+ */
+
int debug_unregister_view(debug_info_t *id, struct debug_view *view);

/*
--
2.20.1