release/src-rt-6.x.4708/linux/linux-2.6.36/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
   6 static inline void 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 */