Staging
v0.5.1
https://github.com/torvalds/linux
Raw File
Tip revision: a21bd69e1509b43823c317c3bf3f7ffa99884356 authored by Linus Torvalds on 06 April 2007, 02:36:56 UTC
Linux 2.6.21-rc6
Tip revision: a21bd69
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
back to top