arch/x86/include/asm/cmpxchg_64.h

   1 #ifndef _ASM_X86_CMPXCHG_64_H
   2 #define _ASM_X86_CMPXCHG_64_H
   3
   4 static inline void set_64bit(volatile u64 *ptr, u64 val)
   5 {
   6         *ptr = val;
   7 }
   8
   9 #define cmpxchg64(ptr, o, n)                                            \
  10 ({                                                                      \
  11         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
  12         cmpxchg((ptr), (o), (n));                                       \
  13 })
  14
  15 #define cmpxchg64_local(ptr, o, n)                                      \
  16 ({                                                                      \
  17         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
  18         cmpxchg_local((ptr), (o), (n));                                 \
  19 })
  20
  21 #define system_has_cmpxchg_double() boot_cpu_has(X86_FEATURE_CX16)
  22
  23 #endif /* _ASM_X86_CMPXCHG_64_H */