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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-06 16:10:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:26 -0700 |
| commit | fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307 (patch) | |
| tree | 1ef13efebe4bba70e37db0283b234a05ed4900c1 | |
| parent | 877d9f3b63ac2e5dbc51cbcdff156433f03b3a32 (diff) | |
| download | op-kernel-dev-fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307.zip op-kernel-dev-fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307.tar.gz | |
lib: bitmap: make the start index of bitmap_set unsigned
The compiler can generate slightly smaller and simpler code when it
knows that "start" is non-negative.
Also, use the names "start" and "len" for the two parameters in both
header file and implementation, instead of the previous mix.
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 | 2 | ||||
| -rw-r--r-- | lib/bitmap.c | 10 |
2 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 64b0ebe..ad2c67d 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -112,7 +112,7 @@ extern int __bitmap_subset(const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int nbits); extern int __bitmap_weight(const unsigned long *bitmap, unsigned int nbits); -extern void bitmap_set(unsigned long *map, int i, int len); +extern void bitmap_set(unsigned long *map, unsigned int start, int len); extern void bitmap_clear(unsigned long *map, int start, int nr); extern unsigned long bitmap_find_next_zero_area(unsigned long *map, unsigned long size, diff --git a/lib/bitmap.c b/lib/bitmap.c index f69435c..2a3a92f 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -274,21 +274,21 @@ int __bitmap_weight(const unsigned long *bitmap, unsigned int bits) } EXPORT_SYMBOL(__bitmap_weight); -void bitmap_set(unsigned long *map, int start, int nr) +void bitmap_set(unsigned long *map, unsigned int start, int len) { unsigned long *p = map + BIT_WORD(start); - const int size = start + nr; + const unsigned int size = start + len; int bits_to_set = BITS_PER_LONG - (start % BITS_PER_LONG); unsigned long mask_to_set = BITMAP_FIRST_WORD_MASK(start); - while (nr - bits_to_set >= 0) { + while (len - bits_to_set >= 0) { *p |= mask_to_set; - nr -= bits_to_set; + len -= bits_to_set; bits_to_set = BITS_PER_LONG; mask_to_set = ~0UL; p++; } - if (nr) { + if (len) { mask_to_set &= BITMAP_LAST_WORD_MASK(size); *p |= mask_to_set; } |
