diff options
| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2014-08-07 03:10:07 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-07 05:01:26 +0400 |
| commit | fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307 (patch) | |
| tree | 1ef13efebe4bba70e37db0283b234a05ed4900c1 /lib | |
| parent | 877d9f3b63ac2e5dbc51cbcdff156433f03b3a32 (diff) | |
| download | linux-fb5ac54263ef3fcb5c469a61e0ab6b06e45e2307.tar.xz | |
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>
Diffstat (limited to 'lib')
| -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 f69435c23f9c..2a3a92fc3355 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; } |