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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 = (char *) dest + count;
            char *s = (char *) src + count;
            while (count--)
                  *--p = *--s;
      }
      return dest;
} 
EXPORT_SYMBOL(memmove);

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