i386 mmzone: use __maybe_unused
Replace automatic variable instances of __attribute__ ((unused)) with __maybe_unused. Cc: Andy Whitcroft <apw@shadowen.org> Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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