diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-06 16:10:03 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:59:30 +0200 |
| commit | 720452c7d817267bbde3c0f2c3fea459b9339a4d (patch) | |
| tree | 22b4df4fb43b42cfec4dbc0d194adc4d91789874 | |
| parent | 7cf359885fd163e66e1e1aeb68fb3c0881ea7bce (diff) | |
lib: bitmap: make nbits parameter of bitmap_subset unsigned
The compiler can generate slightly smaller and simpler code when it
knows that "nbits" is non-negative. Since no-one passes a negative
bit-count, this shouldn't affect the semantics.
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>
| -rw-r--r-- | include/linux/bitmap.h | 4 | ||||
| -rw-r--r-- | lib/bitmap.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 2f3f3a4d5..87e88f79d 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -109,7 +109,7 @@ extern int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1, extern int __bitmap_intersects(const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int nbits); extern int __bitmap_subset(const unsigned long *bitmap1, - const unsigned long *bitmap2, int bits); + const unsigned long *bitmap2, unsigned int nbits); extern int __bitmap_weight(const unsigned long *bitmap, int bits); extern void bitmap_set(unsigned long *map, int i, int len); @@ -249,7 +249,7 @@ static inline int bitmap_intersects(const unsigned long *src1, } static inline int bitmap_subset(const unsigned long *src1, - const unsigned long *src2, int nbits) + const unsigned long *src2, unsigned int nbits) { if (small_const_nbits(nbits)) return ! ((*src1 & ~(*src2)) & BITMAP_LAST_WORD_MASK(nbits)); diff --git a/lib/bitmap.c b/lib/bitmap.c index 0e2ca4e37..9f157d2c5 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -249,9 +249,9 @@ int __bitmap_intersects(const unsigned long *bitmap1, EXPORT_SYMBOL(__bitmap_intersects); int __bitmap_subset(const unsigned long *bitmap1, - const unsigned long *bitmap2, int bits) + const unsigned long *bitmap2, unsigned int bits) { - int k, lim = bits/BITS_PER_LONG; + unsigned int k, lim = bits/BITS_PER_LONG; for (k = 0; k < lim; ++k) if (bitmap1[k] & ~bitmap2[k]) return 0; |