checkpatch: warn on declaration with storage class not at the beginning

The C99 specification states in section 6.11.5:

The placement of a storage-class specifier other than at the beginning
of the declaration specifiers in a declaration is an obsolescent
feature.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Jean Delvare <khali@linux-fr.org>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index de0f467..bd88f11 100755 (executable)
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2601,6 +2601,11 @@ sub process {
                        CHK("architecture specific defines should be avoided\n" .  $herecurr);
                }
 
+# Check that the storage class is at the beginning of a declaration
+               if ($line =~ /\b$Storage\b/ && $line !~ /^.\s*$Storage\b/) {
+                       WARN("storage class should be at the beginning of the declaration\n" . $herecurr)
+               }
+
 # check the location of the inline attribute, that it is between
 # storage class and type.
                if ($line =~ /\b$Type\s+$Inline\b/ ||