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 __HAVE_ARCH_CMPXCHG 1
  10
  11 #define cmpxchg64(ptr, o, n)                                            \
  12 ({                                                                      \
  13         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
  14         cmpxchg((ptr), (o), (n));                                       \
  15 })
  16
  17 #define cmpxchg64_local(ptr, o, n)                                      \
  18 ({                                                                      \
  19         BUILD_BUG_ON(sizeof(*(ptr)) != 8);                              \
  20         cmpxchg_local((ptr), (o), (n));                                 \
  21 })
  22
  23 #define system_has_cmpxchg_double() cpu_has_cx16
  24
  25 #endif /* _ASM_X86_CMPXCHG_64_H */