diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-06 16:10:24 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:27 -0700 |
| commit | 74e765319084bd2940a9612ada961f0f7385936c (patch) | |
| tree | 3adcb5655903b6978283b96e3d062cd82f95b731 /include | |
| parent | 7e5f97d1927f41affa21aa5b321865ceab1994ce (diff) | |
lib: bitmap: add missing mask in bitmap_andnot
Apparently, bitmap_andnot is supposed to return whether the new bitmap
is empty. But it didn't take potential garbage bits in the last word
into account.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bitmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 3399a9ecd991..e1c8d080c427 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -217,7 +217,7 @@ static inline int bitmap_andnot(unsigned long *dst, const unsigned long *src1, const unsigned long *src2, unsigned int nbits) { if (small_const_nbits(nbits)) - return (*dst = *src1 & ~(*src2)) != 0; + return (*dst = *src1 & ~(*src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0; return __bitmap_andnot(dst, src1, src2, nbits); } |