On Wed, 2021-04-07 at 19:50 +0900, Vincent Mailhol wrote:
> __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.
>
> Signed-off-by: Vincent Mailhol <mailhol.vinc...@wanadoo.fr>
Acked-by: Joe Perches <j...@perches.com>
> ---
> scripts/checkpatch.pl | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index df8b23dc1eb0..25ee4fd5b118 100755
> --- a/scripts/checkpatch.pl
> +++ b/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;
