Inspired find_next_*_bit function series, add find_last_zero_bit. These patch adds declarations for find_last_zero_bit. Also, I move declaration of find_last_bit to asm-generic/bitops/find.h Because: I think its declaration need not to in __KERNEL__ macro compared to find_next_*_bit and find_first_*_bit. Signed-off-by: Levi Yun <ppbuk5246@xxxxxxxxx> --- include/asm-generic/bitops/find.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/include/asm-generic/bitops/find.h b/include/asm-generic/bitops/find.h index 9fdf21302fdf..eeb2d6669f83 100644 --- a/include/asm-generic/bitops/find.h +++ b/include/asm-generic/bitops/find.h @@ -80,6 +80,31 @@ extern unsigned long find_first_zero_bit(const unsigned long *addr, #endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ +#ifndef find_last_bit +/** + * find_last_bit - find the last set bit in a memory region + * @addr: The address to start the search at + * @size: The number of bits to search + * + * Returns the bit number of the last set bit, or size. + */ +extern unsigned long find_last_bit(const unsigned long *addr, + unsigned long size); +#endif + +#ifndef find_last_zero_bit +/** + * find_last_zero_bit - find the last cleared bit in a memory region + * @addr: The address to start the search at + * @size: The maximum number of bits to search + * + * Returns the bit number of the first cleared bit. + * If no bits are zero, returns @size. + */ +extern unsigned long find_last_zero_bit(const unsigned long *addr, + unsigned long size); +#endif + /** * find_next_clump8 - find next 8-bit clump with set bits in a memory region * @clump: location to store copy of found clump -- 2.27.0
