1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_GENERIC_BITOPS_ATOMIC_H_
3 #define _ASM_GENERIC_BITOPS_ATOMIC_H_
5 #include <linux/atomic.h>
6 #include <linux/compiler.h>
7 #include <asm/barrier.h>
10 * Implementation of atomic bitops using atomic-fetch ops.
11 * See Documentation/atomic_bitops.txt for details.
14 static __always_inline void set_bit(unsigned int nr, volatile unsigned long *p)
17 atomic_long_or(BIT_MASK(nr), (atomic_long_t *)p);
20 static __always_inline void clear_bit(unsigned int nr, volatile unsigned long *p)
23 atomic_long_andnot(BIT_MASK(nr), (atomic_long_t *)p);
26 static __always_inline void change_bit(unsigned int nr, volatile unsigned long *p)
29 atomic_long_xor(BIT_MASK(nr), (atomic_long_t *)p);
32 static inline int test_and_set_bit(unsigned int nr, volatile unsigned long *p)
35 unsigned long mask = BIT_MASK(nr);
38 old = atomic_long_fetch_or(mask, (atomic_long_t *)p);
39 return !!(old & mask);
42 static inline int test_and_clear_bit(unsigned int nr, volatile unsigned long *p)
45 unsigned long mask = BIT_MASK(nr);
48 old = atomic_long_fetch_andnot(mask, (atomic_long_t *)p);
49 return !!(old & mask);
52 static inline int test_and_change_bit(unsigned int nr, volatile unsigned long *p)
55 unsigned long mask = BIT_MASK(nr);
58 old = atomic_long_fetch_xor(mask, (atomic_long_t *)p);
59 return !!(old & mask);
62 #endif /* _ASM_GENERIC_BITOPS_ATOMIC_H */