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https://github.com/torvalds/linux
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Tip revision: 55639353a0035052d9ea6cfe4dde0ac7fcbb2c9f authored by Linus Torvalds on 18 December 2009, 01:14:40 UTC
Linux 2.6.33-rc1
Tip revision: 5563935
memmove_64.c
/* 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);
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