LXR linux/arch/x86/include/asm/edac.h

   1#ifndef _ASM_X86_EDAC_H
   2#define _ASM_X86_EDAC_H
   3
   4/* ECC atomic, DMA, SMP and interrupt safe scrub function */
   5
   6static inline void edac_atomic_scrub(void *va, u32 size)
   7{
   8        u32 i, *virt_addr = va;
   9
  10        /*
  11         * Very carefully read and write to memory atomically so we
  12         * are interrupt, DMA and SMP safe.
  13         */
  14        for (i = 0; i < size / 4; i++, virt_addr++)
  15                asm volatile("lock; addl $0, %0"::"m" (*virt_addr));
  16}
  17
  18#endif /* _ASM_X86_EDAC_H */
  19