diff options
| author | Zhihao Cheng <chengzhihao1@huawei.com> | 2024-11-11 16:36:46 +0800 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2024-11-11 10:32:45 +0100 |
| commit | 12b706023468c8b8fb1ed0e3fb940151339b1680 (patch) | |
| tree | 0f918175ca15a9ffb6918372af168c4a8b6e0659 /ubifs-utils/common/defs.h | |
| parent | b4460065025ef82f47cf4afa36f6db3b22bda591 (diff) | |
ubifs-utils: Add bit operations implementations
Add bit operations implementations, because there are some bit operations
(eg. __set_bit, test_bit) used in UBIFS linux kernel libs.
This is a preparation for replacing implementation of UBIFS utils with
linux kernel libs.
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'ubifs-utils/common/defs.h')
| -rw-r--r-- | ubifs-utils/common/defs.h | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/ubifs-utils/common/defs.h b/ubifs-utils/common/defs.h index dd3b806..485c50c 100644 --- a/ubifs-utils/common/defs.h +++ b/ubifs-utils/common/defs.h @@ -28,42 +28,6 @@ enum { MKFS_PROGRAM_TYPE = 0 }; #define unlikely(x) (x) -/** - * fls - find last (most-significant) bit set - * @x: the word to search - * - * This is defined the same way as ffs. - * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32. - */ -static inline int fls(int x) -{ - int r = 32; - - if (!x) - return 0; - if (!(x & 0xffff0000u)) { - x <<= 16; - r -= 16; - } - if (!(x & 0xff000000u)) { - x <<= 8; - r -= 8; - } - if (!(x & 0xf0000000u)) { - x <<= 4; - r -= 4; - } - if (!(x & 0xc0000000u)) { - x <<= 2; - r -= 2; - } - if (!(x & 0x80000000u)) { - x <<= 1; - r -= 1; - } - return r; -} - #define do_div(n,base) ({ \ int __res; \ __res = ((unsigned long) n) % (unsigned) base; \ |