1 #ifndef _ASM_X86_BARRIER_H_ 2 #define _ASM_X86_BARRIER_H_ 3 /* 4 * Copyright (C) 2016, Red Hat Inc, Alexander Gordeev <agordeev@redhat.com> 5 * 6 * This work is licensed under the terms of the GNU LGPL, version 2. 7 */ 8 9 #define mb() asm volatile("mfence":::"memory") 10 #define rmb() asm volatile("lfence":::"memory") 11 #define wmb() asm volatile("sfence":::"memory") 12 13 #define smp_mb() mb() 14 #define smp_rmb() barrier() 15 #define smp_wmb() barrier() 16 17 #endif 18