1/* SPDX-License-Identifier: GPL-2.0 */
 2#if defined(__i386__) || defined(__x86_64__)
 3#define barrier() asm volatile("" ::: "memory")
 4#define virt_mb() __sync_synchronize()
 5#define virt_rmb() barrier()
 6#define virt_wmb() barrier()
 7/* Atomic store should be enough, but gcc generates worse code in that case. */
 8#define virt_store_mb(var, value)  do { \
 9	typeof(var) virt_store_mb_value = (value); \
10	__atomic_exchange(&(var), &virt_store_mb_value, &virt_store_mb_value, \
11			  __ATOMIC_SEQ_CST); \
12	barrier(); \
13} while (0);
14/* Weak barriers should be used. If not - it's a bug */
15# define mb() abort()
16# define rmb() abort()
17# define wmb() abort()
18#else
19#error Please fill in barrier macros
20#endif
21

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#if defined(__i386__) || defined(__x86_64__)
 3#define barrier() asm volatile("" ::: "memory")
 4#define virt_mb() __sync_synchronize()
 5#define virt_rmb() barrier()
 6#define virt_wmb() barrier()
 7/* Atomic store should be enough, but gcc generates worse code in that case. */
 8#define virt_store_mb(var, value)  do { \
 9	typeof(var) virt_store_mb_value = (value); \
10	__atomic_exchange(&(var), &virt_store_mb_value, &virt_store_mb_value, \
11			  __ATOMIC_SEQ_CST); \
12	barrier(); \
13} while (0);
14/* Weak barriers should be used. If not - it's a bug */
15# define mb() abort()
16# define dma_rmb() abort()
17# define dma_wmb() abort()
18#else
19#error Please fill in barrier macros
20#endif
21