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https://github.com/torvalds/linux
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Tip revision: 120bda20c6f64b32e8bfbdd7b34feafaa5f5332e authored by Linus Torvalds on 06 July 2006, 04:09:49 UTC
Linux 2.6.18-rc1
Tip revision: 120bda2
edac.h
#ifndef ASM_EDAC_H
#define ASM_EDAC_H

/* ECC atomic, DMA, SMP and interrupt safe scrub function */

static __inline__ void atomic_scrub(void *va, u32 size)
{
	unsigned long *virt_addr = va;
	u32 i;

	for (i = 0; i < size / 4; i++, virt_addr++)
		/* Very carefully read and write to memory atomically
		 * so we are interrupt, DMA and SMP safe.
		 */
		__asm__ __volatile__("lock; addl $0, %0"::"m"(*virt_addr));
}

#endif
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