Re: [PATCH 1/3] checkpatch.pl: add missing memory barriers

From
Russell King - ARM Linux <hidden>
Date
2016-01-04 16:11:44
Also in
linux-arch, linux-arm-kernel, linux-mips, linux-s390, linux-sh, linux-um, lkml, sparclinux
Reply to
Joe Perches, 2016-01-04
On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote:
On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote:
quoted
+		my $all_barriers = join('|', (@barriers, @smp_barriers));
+
+		if ($line =~ /\b($all_barriers)\(/) {
It would be better to use /\b$all_barriers\s*\(/
as there's no reason for the capture and there
could be a space between the function and the
open parenthesis.
I think you mean

	/\b(?:$all_barriers)\s*\(/

as 'all_barriers' will be:

	mb|wmb|rmb|smp_mb|smp_wmb|smp_rmb

and putting that into your suggestion results in:

	/\bmb|wmb|rmb|smp_mb|smp_wmb|smp_rmb\s*\(/

which is clearly wrong - the \b only applies to 'mb' and the \s*\( only
applies to smp_rmb.

-- 
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Thread (14 messages) 14 messages, 3 authors, last reply 2016-01-10
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