1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <asm/compiler.h>
7 /* ECC atomic, DMA, SMP and interrupt safe scrub function */
9 static inline void edac_atomic_scrub(void *va, u32 size)
11 unsigned long *virt_addr = va;
15 for (i = 0; i < size / sizeof(unsigned long); i++) {
17 * Very carefully read and write to memory atomically
18 * so we are interrupt, DMA and SMP safe.
20 * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
23 __asm__ __volatile__ (
26 "1: ll %0, %1 # edac_atomic_scrub \n"
31 : "=&r" (temp), "=" GCC_OFF_SMALL_ASM() (*virt_addr)
32 : GCC_OFF_SMALL_ASM() (*virt_addr));