LXR linux/arch/parisc/include/asm/barrier.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ASM_BARRIER_H
   3#define __ASM_BARRIER_H
   4
   5#ifndef __ASSEMBLY__
   6
   7/* The synchronize caches instruction executes as a nop on systems in
   8   which all memory references are performed in order. */
   9#define synchronize_caches() __asm__ __volatile__ ("sync" : : : "memory")
  10
  11#if defined(CONFIG_SMP)
  12#define mb()            do { synchronize_caches(); } while (0)
  13#define rmb()           mb()
  14#define wmb()           mb()
  15#define dma_rmb()       mb()
  16#define dma_wmb()       mb()
  17#else
  18#define mb()            barrier()
  19#define rmb()           barrier()
  20#define wmb()           barrier()
  21#define dma_rmb()       barrier()
  22#define dma_wmb()       barrier()
  23#endif
  24
  25#define __smp_mb()      mb()
  26#define __smp_rmb()     mb()
  27#define __smp_wmb()     mb()
  28
  29#include <asm-generic/barrier.h>
  30
  31#endif /* !__ASSEMBLY__ */
  32#endif /* __ASM_BARRIER_H */
  33