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| author | Valentin Schneider <vschneid@redhat.com> | 2022-10-03 17:34:17 +0200 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-10-06 14:57:36 +0200 |
| commit | 90d482908eedd56f01a707325aa541cf9c40f936 (patch) | |
| tree | 26cec02bff42dd83de558ba1b7579185726554b0 /lib/find_bit.c | |
| parent | cpumask: fix checking valid cpu range (diff) | |
| download | linux-90d482908eedd56f01a707325aa541cf9c40f936.tar.xz linux-90d482908eedd56f01a707325aa541cf9c40f936.zip | |
lib/find_bit: Introduce find_next_andnot_bit()
In preparation of introducing for_each_cpu_andnot(), add a variant of
find_next_bit() that negate the bits in @addr2 when ANDing them with the
bits in @addr1.
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
Diffstat (limited to 'lib/find_bit.c')
| -rw-r--r-- | lib/find_bit.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/find_bit.c b/lib/find_bit.c index 25609974cbe4..18bc0a7ac8ee 100644 --- a/lib/find_bit.c +++ b/lib/find_bit.c @@ -164,6 +164,15 @@ unsigned long _find_next_and_bit(const unsigned long *addr1, const unsigned long EXPORT_SYMBOL(_find_next_and_bit); #endif +#ifndef find_next_andnot_bit +unsigned long _find_next_andnot_bit(const unsigned long *addr1, const unsigned long *addr2, + unsigned long nbits, unsigned long start) +{ + return FIND_NEXT_BIT(addr1[idx] & ~addr2[idx], /* nop */, nbits, start); +} +EXPORT_SYMBOL(_find_next_andnot_bit); +#endif + #ifndef find_next_zero_bit unsigned long _find_next_zero_bit(const unsigned long *addr, unsigned long nbits, unsigned long start) |