diff options
Diffstat (limited to 'fs/xfs/xfs_bit.h')
| -rw-r--r-- | fs/xfs/xfs_bit.h | 27 |
1 files changed, 5 insertions, 22 deletions
diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/xfs_bit.h index 0f9fc9a3c415..082641a9782c 100644 --- a/fs/xfs/xfs_bit.h +++ b/fs/xfs/xfs_bit.h | |||
| @@ -47,30 +47,13 @@ static inline __uint64_t xfs_mask64lo(int n) | |||
| 47 | } | 47 | } |
| 48 | 48 | ||
| 49 | /* Get high bit set out of 32-bit argument, -1 if none set */ | 49 | /* Get high bit set out of 32-bit argument, -1 if none set */ |
| 50 | static inline int xfs_highbit32(__uint32_t v) | 50 | extern int xfs_highbit32(__uint32_t v); |
| 51 | { | ||
| 52 | return fls(v) - 1; | ||
| 53 | } | ||
| 54 | |||
| 55 | /* Get high bit set out of 64-bit argument, -1 if none set */ | ||
| 56 | static inline int xfs_highbit64(__uint64_t v) | ||
| 57 | { | ||
| 58 | return fls64(v) - 1; | ||
| 59 | } | ||
| 60 | |||
| 61 | /* Get low bit set out of 32-bit argument, -1 if none set */ | ||
| 62 | static inline int xfs_lowbit32(__uint32_t v) | ||
| 63 | { | ||
| 64 | unsigned long t = v; | ||
| 65 | return (v) ? find_first_bit(&t, 32) : -1; | ||
| 66 | } | ||
| 67 | 51 | ||
| 68 | /* Get low bit set out of 64-bit argument, -1 if none set */ | 52 | /* Get low bit set out of 64-bit argument, -1 if none set */ |
| 69 | static inline int xfs_lowbit64(__uint64_t v) | 53 | extern int xfs_lowbit64(__uint64_t v); |
| 70 | { | 54 | |
| 71 | unsigned long t = v; | 55 | /* Get high bit set out of 64-bit argument, -1 if none set */ |
| 72 | return (v) ? find_first_bit(&t, 64) : -1; | 56 | extern int xfs_highbit64(__uint64_t); |
| 73 | } | ||
| 74 | 57 | ||
| 75 | /* Return whether bitmap is empty (1 == empty) */ | 58 | /* Return whether bitmap is empty (1 == empty) */ |
| 76 | extern int xfs_bitmap_empty(uint *map, uint size); | 59 | extern int xfs_bitmap_empty(uint *map, uint size); |
