From 90d482908eedd56f01a707325aa541cf9c40f936 Mon Sep 17 00:00:00 2001 From: Valentin Schneider Date: Mon, 3 Oct 2022 16:34:17 +0100 Subject: 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 --- lib/find_bit.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'lib/find_bit.c') 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) -- cgit v1.2.3-59-g8ed1b