diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2017-12-13 16:00:44 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@gmail.com> | 2017-12-13 16:07:21 -0500 |
| commit | f2feceddae6f3bd3722247f3458860b955f539bc (patch) | |
| tree | 6e8405e81ac080995db7cc20ebd51c1e4de5e4cb /include/linux/bitmap.h | |
| parent | fa36882a73fbb3fd771c506641a1d70d51c07068 (diff) | |
Shim layer updates
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)); |