root/arch/x86/lib/memmove_64.c

DEFINITIONS

1. memmove

/* Normally compiler builtins are used, but sometimes the compiler calls out
   of line code. Based on asm-i386/string.h.
 */
#define _STRING_C
#include <linux/string.h>
#include <linux/module.h>

#undef memmove
void *memmove(void *dest, const void *src, size_t count)
{
        if (dest < src) {
                return memcpy(dest, src, count);
        } else {
                char *p = dest + count;
                const char *s = src + count;
                while (count--)
                        *--p = *--s;
        }
        return dest;
}
EXPORT_SYMBOL(memmove);