diff options
Diffstat (limited to 'tools/include/asm-generic/bitops/atomic.h')
| -rw-r--r-- | tools/include/asm-generic/bitops/atomic.h | 25 |
1 files changed, 7 insertions, 18 deletions
diff --git a/tools/include/asm-generic/bitops/atomic.h b/tools/include/asm-generic/bitops/atomic.h index 68b8c1516c5a..ab37a221b41a 100644 --- a/tools/include/asm-generic/bitops/atomic.h +++ b/tools/include/asm-generic/bitops/atomic.h @@ -1,26 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ #define _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ #include <asm/types.h> #include <asm/bitsperlong.h> -static inline void set_bit(int nr, unsigned long *addr) -{ - addr[nr / __BITS_PER_LONG] |= 1UL << (nr % __BITS_PER_LONG); -} - -static inline void clear_bit(int nr, unsigned long *addr) -{ - addr[nr / __BITS_PER_LONG] &= ~(1UL << (nr % __BITS_PER_LONG)); -} - -static __always_inline int test_bit(unsigned int nr, const unsigned long *addr) -{ - return ((1UL << (nr % __BITS_PER_LONG)) & - (((unsigned long *)addr)[nr / __BITS_PER_LONG])) != 0; -} - -#define __set_bit(nr, addr) set_bit(nr, addr) -#define __clear_bit(nr, addr) clear_bit(nr, addr) +/* + * Just alias the test versions, all of the compiler built-in atomics "fetch", + * and optimizing compile-time constants on x86 isn't worth the complexity. + */ +#define set_bit test_and_set_bit +#define clear_bit test_and_clear_bit #endif /* _TOOLS_LINUX_ASM_GENERIC_BITOPS_ATOMIC_H_ */ |