1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_X86_CMPXCHG_64_H
3 #define _ASM_X86_CMPXCHG_64_H
4
set_64bit(volatile u64 * ptr,u64 val)5 static inline void set_64bit(volatile u64 *ptr, u64 val)
6 {
7 *ptr = val;
8 }
9
10 #define arch_cmpxchg64(ptr, o, n) \
11 ({ \
12 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
13 arch_cmpxchg((ptr), (o), (n)); \
14 })
15
16 #define arch_cmpxchg64_local(ptr, o, n) \
17 ({ \
18 BUILD_BUG_ON(sizeof(*(ptr)) != 8); \
19 arch_cmpxchg_local((ptr), (o), (n)); \
20 })
21
22 #define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX16)
23
24 #endif /* _ASM_X86_CMPXCHG_64_H */
25