The patch titled
Subject: checkpatch: exclude four preprocessor sub-expressions from MACRO_ARG_REUSE
has been added to the -mm tree. Its filename is
checkpatch-exclude-four-preprocessor-sub-expressions-from-macro_arg_reuse.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/checkpatch-exclude-four-preprocessor-sub-expressions-from-macro_arg_reuse.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/checkpatch-exclude-four-preprocessor-sub-expressions-from-macro_arg_reuse.patch
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------------------------------------------------------
From: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
Subject: checkpatch: exclude four preprocessor sub-expressions from MACRO_ARG_REUSE
__must_be_array, offsetof, sizeof_field and __stringify are all
preprocessor macros and do not evaluate their arguments. As such, it is
safe not to warn when arguments are being reused in those four
sub-expressions.
Exclude those so that they can pass checkpatch.
Link: https://lkml.kernel.org/r/20210407105042.25380-1-mailhol.vincent@xxxxxxxxxx
Signed-off-by: Vincent Mailhol <mailhol.vincent@xxxxxxxxxx>
Acked-by: Joe Perches <joe@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/checkpatch.pl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/scripts/checkpatch.pl~checkpatch-exclude-four-preprocessor-sub-expressions-from-macro_arg_reuse
+++ a/scripts/checkpatch.pl
@@ -5736,7 +5736,7 @@ sub process {
next if ($arg =~ /\.\.\./);
next if ($arg =~ /^type$/i);
my $tmp_stmt = $define_stmt;
- $tmp_stmt =~ s/\b(sizeof|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
+ $tmp_stmt =~ s/\b(__must_be_array|offsetof|sizeof|sizeof_field|__stringify|typeof|__typeof__|__builtin\w+|typecheck\s*\(\s*$Type\s*,|\#+)\s*\(*\s*$arg\s*\)*\b//g;
$tmp_stmt =~ s/\#+\s*$arg\b//g;
$tmp_stmt =~ s/\b$arg\s*\#\#//g;
my $use_cnt = () = $tmp_stmt =~ /\b$arg\b/g;
_
Patches currently in -mm which might be from mailhol.vincent@xxxxxxxxxx are
checkpatch-exclude-four-preprocessor-sub-expressions-from-macro_arg_reuse.patch
