diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-06 16:10:10 -0700 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:59:31 +0200 |
| commit | 5e54cec5f33efceaf540c94c7b17170cdd0c24e7 (patch) | |
| tree | b20113eea25e0fb2f233f6dad8eab8928eb868b8 | |
| parent | 5d971ca7009e31a3c769121430a8da7c0c2dc5c0 (diff) | |
lib: bitmap: make the start index of bitmap_clear 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 for
consistency with bitmap_set.
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 60cc259f3..a6193a23e 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -114,7 +114,7 @@ extern int __bitmap_subset(const unsigned long *bitmap1, extern int __bitmap_weight(const unsigned long *bitmap, unsigned int nbits); extern void bitmap_set(unsigned long *map, unsigned int start, int len); -extern void bitmap_clear(unsigned long *map, int start, int nr); +extern void bitmap_clear(unsigned long *map, unsigned int start, int len); extern unsigned long bitmap_find_next_zero_area_off(unsigned long *map, unsigned long size, diff --git a/lib/bitmap.c b/lib/bitmap.c index 726a8ddd3..699a423fa 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -299,21 +299,21 @@ void bitmap_set(unsigned long *map, unsigned int start, int len) } EXPORT_SYMBOL(bitmap_set); -void bitmap_clear(unsigned long *map, int start, int nr) +void bitmap_clear(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_clear = BITS_PER_LONG - (start % BITS_PER_LONG); unsigned long mask_to_clear = BITMAP_FIRST_WORD_MASK(start); - while (nr - bits_to_clear >= 0) { + while (len - bits_to_clear >= 0) { *p &= ~mask_to_clear; - nr -= bits_to_clear; + len -= bits_to_clear; bits_to_clear = BITS_PER_LONG; mask_to_clear = ~0UL; p++; } - if (nr) { + if (len) { mask_to_clear &= BITMAP_LAST_WORD_MASK(size); *p &= ~mask_to_clear; } |