diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-x86/bitops_32.h | 2 | ||||
-rw-r--r-- | include/linux/bitops.h | 34 |
2 files changed, 36 insertions, 0 deletions
diff --git a/include/asm-x86/bitops_32.h b/include/asm-x86/bitops_32.h index 3ed64b21b76..ba2c0defafa 100644 --- a/include/asm-x86/bitops_32.h +++ b/include/asm-x86/bitops_32.h @@ -5,6 +5,7 @@ * Copyright 1992, Linus Torvalds. */ +#ifndef CONFIG_GENERIC_FIND_FIRST_BIT /** * find_first_zero_bit - find the first zero bit in a memory region * @addr: The address to start the search at @@ -59,6 +60,7 @@ static inline unsigned find_first_bit(const unsigned long *addr, unsigned size) } return x; } +#endif #ifdef __KERNEL__ diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 3865f2c93bd..355d67ba3bd 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -113,6 +113,40 @@ static inline unsigned fls_long(unsigned long l) } #ifdef __KERNEL__ +#ifdef CONFIG_GENERIC_FIND_FIRST_BIT +extern unsigned long __find_first_bit(const unsigned long *addr, + unsigned long size); + +/** + * find_first_bit - find the first set bit in a memory region + * @addr: The address to start the search at + * @size: The maximum size to search + * + * Returns the bit number of the first set bit. + */ +static __always_inline unsigned long +find_first_bit(const unsigned long *addr, unsigned long size) +{ + return __find_first_bit(addr, size); +} + +extern unsigned long __find_first_zero_bit(const unsigned long *addr, + unsigned long size); + +/** + * find_first_zero_bit - find the first cleared bit in a memory region + * @addr: The address to start the search at + * @size: The maximum size to search + * + * Returns the bit number of the first cleared bit. + */ +static __always_inline unsigned long +find_first_zero_bit(const unsigned long *addr, unsigned long size) +{ + return __find_first_zero_bit(addr, size); +} +#endif /* CONFIG_GENERIC_FIND_FIRST_BIT */ + #ifdef CONFIG_GENERIC_FIND_NEXT_BIT extern unsigned long __find_next_bit(const unsigned long *addr, unsigned long size, unsigned long offset); |