--- zzzz-none-000/linux-4.4.60/arch/mips/boot/compressed/string.c	2017-04-08 07:53:53.000000000 +0000
+++ scorpion-7490-727/linux-4.4.60/arch/mips/boot/compressed/string.c	2021-02-04 17:41:59.000000000 +0000
@@ -26,3 +26,19 @@
 		ss[i] = c;
 	return s;
 }
+
+void *memmove(void *__dest, __const void *__src, size_t count)
+{
+	unsigned char *d = __dest;
+	const unsigned char *s = __src;
+
+	if (__dest == __src)
+		return __dest;
+
+	if (__dest < __src)
+		return memcpy(__dest, __src, count);
+
+	while (count--)
+		d[count] = s[count];
+	return __dest;
+}