Re: [PATCH V3 03/16] platform/x86/intel/vsec: Use cleanup.h

Joe Perches
2023-10-24T05:16:09Z

On Fri, 2023-10-13 at 11:14 -0700, Joe Perches wrote:
> On Fri, 2023-10-13 at 13:39 +0300, Ilpo Järvinen wrote:
> > Hi,
> >
> > I added checkpatch people, please check what looks a false positive below.
>
> Yeah, thanks I guess.
> The __free uses are very new.
> I'll play around with adding it to $Attributes
> and see what happens.
>
>
> > On Thu, 12 Oct 2023, David E. Box wrote:
> > > On Thu, 2023-10-12 at 13:25 +0800, kernel test robot wrote:
> > > > kernel test robot noticed the following build warnings:
> > > > # many are suggestions rather than must-fix
> []
> > > > ERROR:SPACING: need consistent spacing around '*' (ctx:WxV)
> > > > #31: FILE: drivers/platform/x86/intel/vsec.c:159:
> > > > +       struct intel_vsec_device __free(kfree) *intel_vsec_dev = NULL;
> > > .
> > > These looks like false positives.
> >
> > I agree. If I interpret the error message right checkpatch seems to think
> > that's a multiplication which is not the case here.

So __free is an odd $Attribute as it takes an argument.
I've added it along with the other odd $Attribute __alloc_size
to another variable called $ArgAttribute and $Attribute.

Oddly, I don't understand why perl does not perform
the elimination using

$foo =~ s/\b$ArgAttribute\b//g;

but does do the elimination using

$foo =~ s/\b$ArgAttribute//g;

maybe something to do with the closing parenthesis in the match.

So now there is a separate substitution for this in a test.

Comments?

---
scripts/checkpatch.pl | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 25fdb7fda1128..501383fa31c55 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -488,9 +488,14 @@ our $InitAttributeConst = qr{$InitAttributePrefix(?:initconst\b)};
our $InitAttributeInit = qr{$InitAttributePrefix(?:init\b)};
our $InitAttribute = qr{$InitAttributeData|$InitAttributeConst|$InitAttributeInit};

+our $ArgAttribute = qr{(?x:
+ __alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\)|
+ __free\s*\(\s*\w+\s*\)
+)};
+
# Notes to $Attribute:
# We need \b after 'init' otherwise 'initconst' will cause a false positive in a check
-our $Attribute = qr{
+our $Attribute = qr{(?x:
const|
volatile|
__percpu|
@@ -516,8 +521,8 @@ our $Attribute = qr{
____cacheline_aligned_in_smp|
____cacheline_internodealigned_in_smp|
__weak|
- __alloc_size\s*\(\s*\d+\s*(?:,\s*\d+\s*)?\)
- }x;
+ $ArgAttribute
+ )};
our $Modifier;
our $Inline = qr{inline|__always_inline|noinline|__inline|__inline__};
our $Member = qr{->$Ident|\.$Ident|\[[^]]*\]};
@@ -4091,6 +4096,9 @@ sub process {
# remove $Attribute/$Sparse uses to simplify comparisons
$sl =~ s/\b(?:$Attribute|$Sparse)\b//g;
$pl =~ s/\b(?:$Attribute|$Sparse)\b//g;
+ $sl =~ s/\b(?:$ArgAttribute)//g;
+ $pl =~ s/\b(?:$ArgAttribute)//g;
+
if (($pl =~ /^\+\s+$Declare\s*$Ident\s*[=,;:\[]/ ||
# function pointer declarations
$pl =~ /^\+\s+$Declare\s*\(\s*\*\s*$Ident\s*\)\s*[=,;:\[\(]/ ||