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lib: bitmap: make nbits parameter of bitmap_intersects 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>
hifive-unleashed-5.1
Rasmus Villemoes 2014-08-06 16:10:01 -07:00 committed by Linus Torvalds
parent 2f9305eb31
commit 6dfe9799c2
2 changed files with 4 additions and 4 deletions
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4
include/linux/bitmap.h
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@ -107,7 +107,7 @@ extern void __bitmap_xor(unsigned long *dst, const unsigned long *bitmap1,
extern int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int nbits);
extern int __bitmap_intersects(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits);
const unsigned long *bitmap2, unsigned int nbits);
extern int __bitmap_subset(const unsigned long *bitmap1,
const unsigned long *bitmap2, int bits);
extern int __bitmap_weight(const unsigned long *bitmap, int bits);
@ -240,7 +240,7 @@ static inline int bitmap_equal(const unsigned long *src1,
}
static inline int bitmap_intersects(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)) != 0;

4
lib/bitmap.c
View File

@ -230,9 +230,9 @@ int __bitmap_andnot(unsigned long *dst, const unsigned long *bitmap1,
EXPORT_SYMBOL(__bitmap_andnot);
int __bitmap_intersects(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 1;