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Date: Fri, 26 Mar 2010 13:44:00 -0700 From: David Daney <ddaney@...iumnetworks.com> To: torvalds@...ux-foundation.org, akpm@...ux-foundation.org Cc: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, David Daney <ddaney@...iumnetworks.com> Subject: [PATCH] Protect prefetch macro arguments. The GCC built-in __builtin_prefetch() is a vargs function. If we don't wrap the macro parameter in parentheses, a comma operator in the actual argument list might cause unintended parameters to be passed to __builtin_prefetch(). Signed-off-by: David Daney <ddaney@...iumnetworks.com> --- include/linux/prefetch.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/prefetch.h b/include/linux/prefetch.h index af7c36a..6179433 100644 --- a/include/linux/prefetch.h +++ b/include/linux/prefetch.h @@ -35,11 +35,11 @@ */ #ifndef ARCH_HAS_PREFETCH -#define prefetch(x) __builtin_prefetch(x) +#define prefetch(x) __builtin_prefetch((x)) #endif #ifndef ARCH_HAS_PREFETCHW -#define prefetchw(x) __builtin_prefetch(x,1) +#define prefetchw(x) __builtin_prefetch((x), 1) #endif #ifndef ARCH_HAS_SPINLOCK_PREFETCH -- 1.6.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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