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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2014-08-06 16:10:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-06 18:01:26 -0700
commit5be20213e855550de2b32fde6fc116f74bab86a6 (patch)
tree91daf951163c9376d46c3b686d0a47f936c702ef
parent6dfe9799c2a03d225316a3e959b0447f3f50303e (diff)
downloadop-kernel-dev-5be20213e855550de2b32fde6fc116f74bab86a6.zip
op-kernel-dev-5be20213e855550de2b32fde6fc116f74bab86a6.tar.gz
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.h4
-rw-r--r--lib/bitmap.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 2f3f3a4..87e88f7 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 e85daa9..c9bff53 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -245,9 +245,9 @@ 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;
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