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lib/find_bit: Introduce find_next_andnot_bit()

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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>
This commit is contained in:
Valentin Schneider
2022-10-03 16:34:17 +01:00
committed by Yury Norov
parent 78e5a33994
commit 90d482908e
2 changed files with 42 additions and 0 deletions
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9
lib/find_bit.c
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@@ -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)