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Linux/arch/x86/include/asm/cmpxchg_64.h

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  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 */
 24 

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