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| author | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-10 22:13:01 -0400 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-06-10 22:15:00 -0400 |
| commit | 17d1c4f4fe29453fbb4087eb5de8aa6f9e6605c7 (patch) | |
| tree | 84a0fb52242d7890ff6b2eb8c449b696f2edd844 /include/linux/bitmap.h | |
| parent | 7a66cf70c5d8b02f84595e5648c12e7422e4d03e (diff) | |
Update bcachefs sources to ed6b7f81a7 six locks: Disable percpu read lock mode in userspace
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'include/linux/bitmap.h')
| -rw-r--r-- | include/linux/bitmap.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 80e8ecda..db2dfdb2 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -135,4 +135,12 @@ static inline unsigned long find_next_zero_bit(const unsigned long *addr, unsign #define find_first_bit(addr, size) find_next_bit((addr), (size), 0) #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0) +static inline bool bitmap_empty(const unsigned long *src, unsigned nbits) +{ + if (small_const_nbits(nbits)) + return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_bit(src, nbits) == nbits; +} + #endif /* _PERF_BITOPS_H */ |