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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2014-08-06 16:09:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-06 18:01:26 -0700
commit3d6684f4e6a46f3a8263f5681e093bccbb767a1c (patch)
tree98c966485624e303a734e3a9c58ae97aea25d2bf
parent5e068069319a9fb02fb14337c2cedeae5f16d812 (diff)
lib: bitmap: make nbits parameter of bitmap_complement 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.h6
-rw-r--r--lib/bitmap.c4
2 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 1e0f46c91125..21fb52ffe444 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -93,7 +93,7 @@ extern int __bitmap_full(const unsigned long *bitmap, unsigned int nbits);
extern int __bitmap_equal(const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int nbits);
extern void __bitmap_complement(unsigned long *dst, const unsigned long *src,
- int bits);
+ unsigned int nbits);
extern void __bitmap_shift_right(unsigned long *dst,
const unsigned long *src, int shift, int bits);
extern void __bitmap_shift_left(unsigned long *dst,
@@ -222,7 +222,7 @@ static inline int bitmap_andnot(unsigned long *dst, const unsigned long *src1,
}
static inline void bitmap_complement(unsigned long *dst, const unsigned long *src,
- int nbits)
+ unsigned int nbits)
{
if (small_const_nbits(nbits))
*dst = ~(*src) & BITMAP_LAST_WORD_MASK(nbits);
@@ -231,7 +231,7 @@ static inline void bitmap_complement(unsigned long *dst, const unsigned long *sr
}
static inline int bitmap_equal(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 d6bb955e71cb..0f2f845702eb 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -86,9 +86,9 @@ int __bitmap_equal(const unsigned long *bitmap1,
}
EXPORT_SYMBOL(__bitmap_equal);
-void __bitmap_complement(unsigned long *dst, const unsigned long *src, int bits)
+void __bitmap_complement(unsigned long *dst, const unsigned long *src, unsigned int bits)
{
- int k, lim = bits/BITS_PER_LONG;
+ unsigned int k, lim = bits/BITS_PER_LONG;
for (k = 0; k < lim; ++k)
dst[k] = ~src[k];