1#ifndef __BARRIER_H
 2#define __BARRIER_H
 3
 4#include <asm/compiler.h>
 5
 6#define mb() \
 7__asm__ __volatile__("mb": : :"memory")
 8
 9#define rmb() \
10__asm__ __volatile__("mb": : :"memory")
11
12#define wmb() \
13__asm__ __volatile__("wmb": : :"memory")
14
15#define read_barrier_depends() \
16__asm__ __volatile__("mb": : :"memory")
17
18#ifdef CONFIG_SMP
19#define __ASM_SMP_MB	"\tmb\n"
20#define smp_mb()	mb()
21#define smp_rmb()	rmb()
22#define smp_wmb()	wmb()
23#define smp_read_barrier_depends()	read_barrier_depends()
24#else
25#define __ASM_SMP_MB
26#define smp_mb()	barrier()
27#define smp_rmb()	barrier()
28#define smp_wmb()	barrier()
29#define smp_read_barrier_depends()	do { } while (0)
30#endif
31
32#define set_mb(var, value) \
33do { var = value; mb(); } while (0)
34
35#endif		/* __BARRIER_H */

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __BARRIER_H
 3#define __BARRIER_H
 4
 5#define mb()	__asm__ __volatile__("mb": : :"memory")
 6#define rmb()	__asm__ __volatile__("mb": : :"memory")
 7#define wmb()	__asm__ __volatile__("wmb": : :"memory")
 8
 9#define __smp_load_acquire(p)						\
10({									\
11	compiletime_assert_atomic_type(*p);				\
12	__READ_ONCE(*p);						\
13})
 
 
 
 
14
15#ifdef CONFIG_SMP
16#define __ASM_SMP_MB	"\tmb\n"
 
 
 
 
17#else
18#define __ASM_SMP_MB
 
 
 
 
19#endif
20
21#include <asm-generic/barrier.h>
 
22
23#endif		/* __BARRIER_H */