Commit f4073b0f authored Jan 04, 2016 by Michael S. Tsirkin

checkpatch: check for __smp outside barrier.h



Introduction of __smp barriers cleans up a bunch of duplicate code, but
it gives people an additional handle onto a "new" set of barriers - just
because they're prefixed with __* unfortunately doesn't stop anyone from
using it (as happened with other arch stuff before.)

Add a checkpatch test so it will trigger a warning.

Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Julian Calaby <julian.calaby@gmail.com>
Acked-by: Joe Perches <joe@perches.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>

parent 402c2553

scripts/checkpatch.pl

+10 −0

Original line number	Diff line number	Diff line
		@@ -5143,6 +5143,16 @@ sub process {
		}
		}

		my $underscore_smp_barriers = qr{__smp_(?:$barrier_stems)}x;

		if ($realfile !~ m@^include/asm-generic/@ &&
		$realfile !~ m@/barrier\.h$@ &&
		$line =~ m/\b(?:$underscore_smp_barriers)\s*\(/ &&
		$line !~ m/^.\s\#\sdefine\s+(?:$underscore_smp_barriers)\s*\(/) {
		WARN("MEMORY_BARRIER",
		"__smp memory barriers shouldn't be used outside barrier.h and asm-generic\n" . $herecurr);
		}

		# check for waitqueue_active without a comment.
		if ($line =~ /\bwaitqueue_active\s*\(/) {
		if (!ctx_has_comment($first_line, $linenr)) {