diff options
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 0a8503a..40ca221 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -196,6 +196,14 @@ static inline void bitmap_fill(unsigned long *dst, unsigned int nbits) } } +static inline bool bitmap_empty(const unsigned long *src, unsigned int nbits) +{ + if (small_const_nbits(nbits)) + return !(*src & BITMAP_LAST_WORD_MASK(nbits)); + + return find_first_bit(src, nbits) == nbits; +} + static inline void bitmap_or(unsigned long *dst, const unsigned long *src1, const unsigned long *src2, unsigned int nbits) { |