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authorRasmus Villemoes <linux@rasmusvillemoes.dk>2014-08-06 16:09:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-06 18:01:25 -0700
commit8397927c8045c58afc68ef839855eb5505259df3 (patch)
tree23cc552420716dcd15952cbfb0901bf7bcfd87bc
parent0679cc483669d08153d158273455398a389ee9ca (diff)
lib: bitmap: make nbits parameter of bitmap_full 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 3d3fd6b2f157..bc7e520d3f78 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -89,7 +89,7 @@
*/
extern int __bitmap_empty(const unsigned long *bitmap, unsigned int nbits);
-extern int __bitmap_full(const unsigned long *bitmap, int bits);
+extern int __bitmap_full(const unsigned long *bitmap, unsigned int nbits);
extern int __bitmap_equal(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits);
extern void __bitmap_complement(unsigned long *dst, const unsigned long *src,
@@ -265,7 +265,7 @@ static inline int bitmap_empty(const unsigned long *src, unsigned nbits)
return __bitmap_empty(src, nbits);
}
-static inline int bitmap_full(const unsigned long *src, int nbits)
+static inline int bitmap_full(const unsigned long *src, unsigned int nbits)
{
if (small_const_nbits(nbits))
return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits));
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 378911001442..9859f38660f9 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -55,9 +55,9 @@ int __bitmap_empty(const unsigned long *bitmap, unsigned int bits)
}
EXPORT_SYMBOL(__bitmap_empty);
-int __bitmap_full(const unsigned long *bitmap, int bits)
+int __bitmap_full(const unsigned long *bitmap, 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 (~bitmap[k])
return 0;