Quelle  barrier.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/compiler.h>
#if defined(__i386__) || defined(__x86_64__)
#include "../../arch/x86/include/asm/barrier.h"
#elif defined(__arm__)
#include "../../arch/arm/include/asm/barrier.h"
#elif defined(__aarch64__)
#include "../../arch/arm64/include/asm/barrier.h"
#elif defined(__powerpc__)
#include "../../arch/powerpc/include/asm/barrier.h"
#elif defined(__riscv)
#include "../../arch/riscv/include/asm/barrier.h"
#elif defined(__s390__)
#include "../../arch/s390/include/asm/barrier.h"
#elif defined(__sh__)
#include "../../arch/sh/include/asm/barrier.h"
#elif defined(__sparc__)
#include "../../arch/sparc/include/asm/barrier.h"
#elif defined(__tile__)
#include "../../arch/tile/include/asm/barrier.h"
#elif defined(__alpha__)
#include "../../arch/alpha/include/asm/barrier.h"
#elif defined(__mips__)
#include "../../arch/mips/include/asm/barrier.h"
#elif defined(__ia64__)
#include "../../arch/ia64/include/asm/barrier.h"
#elif defined(__xtensa__)
#include "../../arch/xtensa/include/asm/barrier.h"
#else
#include <asm-generic/barrier.h>
#endif

/*
 * Generic fallback smp_*() definitions for archs that haven't
 * been updated yet.
 */

#ifndef smp_rmb
# define smp_rmb() rmb()
#endif

#ifndef smp_wmb
# define smp_wmb() wmb()
#endif

#ifndef smp_mb
# define smp_mb() mb()
#endif

#ifndef smp_store_release
# define smp_store_release(p, v)  \
do {      \
 smp_mb();    \
 WRITE_ONCE(*p, v);   \
} while (0)
#endif

#ifndef smp_load_acquire
# define smp_load_acquire(p)   \
({      \
 typeof(*p) ___p1 = READ_ONCE(*p); \
 smp_mb();    \
 ___p1;     \
})
#endif