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authorH. Peter Anvin <hpa@zytor.com>2014-04-30 14:22:19 -0700
committerAlex Shi <alex.shi@linaro.org>2014-05-29 09:23:12 +0800
commitdd429e144fe3a9cea9b08985a687da8740ec5d8a (patch)
treef9fbd5c557c0746bc8bc2de97c159072170600be
parent616f215571c4e078a00d529eda02c4fb561d02b8 (diff)
downloadlinux-linaro-stable-v3.14/topic/arm64-be.tar.gz
word-at-a-time: simplify big-endian zero_bytemask macrov3.14/topic/arm64-be
This is simpler and cleaner. Depending on architecture, a smart compiler may or may not generate the same code. Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> (cherry picked from commit 789ce9dca8007ab5d7c72b9a174a29243817ac32) Signed-off-by: Alex Shi <alex.shi@linaro.org>
-rw-r--r--include/asm-generic/word-at-a-time.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-generic/word-at-a-time.h b/include/asm-generic/word-at-a-time.h
index d96deb443f18..94f9ea8abcae 100644
--- a/include/asm-generic/word-at-a-time.h
+++ b/include/asm-generic/word-at-a-time.h
@@ -50,7 +50,7 @@ static inline bool has_zero(unsigned long val, unsigned long *data, const struct
}
#ifndef zero_bytemask
-#define zero_bytemask(mask) (~0ul << __fls(mask) << 1)
+#define zero_bytemask(mask) (~1ul << __fls(mask))
#endif
#endif /* _ASM_WORD_AT_A_TIME_H */