diff options
Diffstat (limited to 'include/linux/bitmap.h')
| -rw-r--r-- | include/linux/bitmap.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 9f47ec2..a7231b8 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -25,6 +25,17 @@ int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, #define small_const_nbits(nbits) \ (__builtin_constant_p(nbits) && (nbits) <= BITS_PER_LONG) +static inline void bitmap_complement(unsigned long *dst, const unsigned long *src, + unsigned int bits) +{ + unsigned int k, lim = bits/BITS_PER_LONG; + for (k = 0; k < lim; ++k) + dst[k] = ~src[k]; + + if (bits % BITS_PER_LONG) + dst[k] = ~src[k]; +} + static inline void bitmap_zero(unsigned long *dst, int nbits) { memset(dst, 0, BITS_TO_LONGS(nbits) * sizeof(unsigned long)); |