edac.h

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#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;
    unsigned long temp;
    u32 i;

    for (i = 0; i < size / sizeof(unsigned long); i++) {
        /*
         * Very carefully read and write to memory atomically
         * so we are interrupt, DMA and SMP safe.
         *
         * Intel: asm("lock; addl $0, %0"::"m"(*virt_addr));
         */

        __asm__ __volatile__ (
        "   .set    mips2                   \n"
        "1: ll  %0, %1      # atomic_scrub      \n"
        "   addu    %0, $0                  \n"
        "   sc  %0, %1                  \n"
        "   beqz    %0, 1b                  \n"
        "   .set    mips0                   \n"
        : "=&r" (temp), "=m" (*virt_addr)
        : "m" (*virt_addr));

        virt_addr++;
    }
}

#endif