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1/* SPDX-License-Identifier: GPL-2.0 */2#include <linux/compiler.h>3#if defined(__i386__) || defined(__x86_64__)4#include "../../arch/x86/include/asm/barrier.h"5#elif defined(__arm__)6#include "../../arch/arm/include/asm/barrier.h"7#elif defined(__aarch64__)8#include "../../arch/arm64/include/asm/barrier.h"9#elif defined(__powerpc__)10#include "../../arch/powerpc/include/asm/barrier.h"11#elif defined(__riscv)12#include "../../arch/riscv/include/asm/barrier.h"13#elif defined(__s390__)14#include "../../arch/s390/include/asm/barrier.h"15#elif defined(__sh__)16#include "../../arch/sh/include/asm/barrier.h"17#elif defined(__sparc__)18#include "../../arch/sparc/include/asm/barrier.h"19#elif defined(__tile__)20#include "../../arch/tile/include/asm/barrier.h"21#elif defined(__alpha__)22#include "../../arch/alpha/include/asm/barrier.h"23#elif defined(__mips__)24#include "../../arch/mips/include/asm/barrier.h"25#elif defined(__ia64__)26#include "../../arch/ia64/include/asm/barrier.h"27#elif defined(__xtensa__)28#include "../../arch/xtensa/include/asm/barrier.h"29#else30#include <asm-generic/barrier.h>31#endif32 33/*34 * Generic fallback smp_*() definitions for archs that haven't35 * been updated yet.36 */37 38#ifndef smp_rmb39# define smp_rmb() rmb()40#endif41 42#ifndef smp_wmb43# define smp_wmb() wmb()44#endif45 46#ifndef smp_mb47# define smp_mb() mb()48#endif49 50#ifndef smp_store_release51# define smp_store_release(p, v) \52do { \53 smp_mb(); \54 WRITE_ONCE(*p, v); \55} while (0)56#endif57 58#ifndef smp_load_acquire59# define smp_load_acquire(p) \60({ \61 typeof(*p) ___p1 = READ_ONCE(*p); \62 smp_mb(); \63 ___p1; \64})65#endif66