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authorH. Peter Anvin <hpa@zytor.com>2014-04-30 14:22:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-05-01 08:57:44 -0700
commit789ce9dca8007ab5d7c72b9a174a29243817ac32 (patch)
tree7b344616a976668594ff6cf56f0de7e3c32ab4eb /include
parent98794f932138c81bfaa609fda21ddd7e97227abd (diff)
downloadlinux-789ce9dca8007ab5d7c72b9a174a29243817ac32.tar.bz2
word-at-a-time: simplify big-endian zero_bytemask macro
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>
Diffstat (limited to 'include')
-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 */