[PATCH v1] checkpatch: exclude four preprocessor sub-expressions from MACRO_ARG_REUSE

[Vincent Mailhol]

__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>
---
 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;
-- 
2.26.2