tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel / tools / virtio / asm / barrier.h
at v4.2 14 lines 361 B view raw
1#if defined(__i386__) || defined(__x86_64__) 2#define barrier() asm volatile("" ::: "memory") 3#define mb() __sync_synchronize() 4 5#define smp_mb() mb() 6# define smp_rmb() barrier() 7# define smp_wmb() barrier() 8/* Weak barriers should be used. If not - it's a bug */ 9# define rmb() abort() 10# define wmb() abort() 11#else 12#error Please fill in barrier macros 13#endif 14