diff options
| author | Michal Nazarewicz <mina86@mina86.com> | 2010-12-15 21:34:22 +0100 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:59:31 +0200 |
| commit | 5d971ca7009e31a3c769121430a8da7c0c2dc5c0 (patch) | |
| tree | 44bb4079309f24df518feac9a932a8776ed64336 /include | |
| parent | 8c274dca44a65a072fed8e9653adc20d11b03c8e (diff) | |
lib: add bitmap_find_next_zero_area_off()
This commit adds a bitmap_find_next_zero_area_off() function which
works like bitmap_find_next_zero_area() function expect it allows an
offset to be specified when alignment is checked. This lets caller
request a bit such that its number plus the offset is aligned
according to the mask.
Change-Id: Ib0593cf578ed69ba4c51b1e102a1f8ea1aeb93e8
Signed-off-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Larry Bassel <lbassel@codeaurora.org>
(cherry picked from commit 5f2929128ae4db1a6577748c72437f102ed400a5)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bitmap.h | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index ad2c67d35..60cc259f3 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -45,6 +45,7 @@ * bitmap_set(dst, pos, nbits) Set specified bit area * bitmap_clear(dst, pos, nbits) Clear specified bit area * bitmap_find_next_zero_area(buf, len, pos, n, mask) Find bit free area + * bitmap_find_next_zero_area_off(buf, len, pos, n, mask) as above * bitmap_shift_right(dst, src, n, nbits) *dst = *src >> n * bitmap_shift_left(dst, src, n, nbits) *dst = *src << n * bitmap_remap(dst, src, old, new, nbits) *dst = map(old, new)(src) @@ -114,11 +115,24 @@ 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 unsigned long bitmap_find_next_zero_area(unsigned long *map, - unsigned long size, - unsigned long start, - unsigned int nr, - unsigned long align_mask); + +extern unsigned long bitmap_find_next_zero_area_off(unsigned long *map, + unsigned long size, + unsigned long start, + unsigned int nr, + unsigned long align_mask, + unsigned long align_offset); + +static inline unsigned long +bitmap_find_next_zero_area(unsigned long *map, + unsigned long size, + unsigned long start, + unsigned int nr, + unsigned long align_mask) +{ + return bitmap_find_next_zero_area_off(map, size, start, nr, + align_mask, 0); +} extern int bitmap_scnprintf(char *buf, unsigned int len, const unsigned long *src, int nbits); |