[PATCH] checkpatch: Make the memory barrier test noisier

[Joe Perches <joe@perches.com>]

Peter Zijlstra prefers that comments be required near uses
of memory barriers.

Change the message level for memory barrier uses from a
--strict test only to a normal WARN so it's always emitted.

This might produce false positives around insertions of
memory barriers when a comment is outside the patch context
block.

And checkpatch is still stupid, it only looks for existence
of any comment, not at the comment content.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Joe Perches <joe@perches.com>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c03e427..bd4103a 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3816,8 +3816,8 @@ sub string_find_replace {
 # check for memory barriers without a comment.
 		if ($line =~ /\b(mb|rmb|wmb|read_barrier_depends|smp_mb|smp_rmb|smp_wmb|smp_read_barrier_depends)\(/) {
 			if (!ctx_has_comment($first_line, $linenr)) {
-				CHK("MEMORY_BARRIER",
-				    "memory barrier without comment\n" . $herecurr);
+				WARN("MEMORY_BARRIER",
+				     "memory barrier without comment\n" . $herecurr);
 			}
 		}
 # check of hardware specific defines



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