diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-06 16:10:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:26 -0700 |
| commit | 154f5e38f30f262025c8c2e825376f6eb51e8bcb (patch) | |
| tree | 2b9850d703dfe9d0a7dca3748f7f4781f9a6c3b2 /lib/bitmap.c | |
| parent | fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307 (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>
Diffstat (limited to 'lib/bitmap.c')
| -rw-r--r-- | lib/bitmap.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 2a3a92fc3355..5d2540396300 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -295,21 +295,21 @@ 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; } |