--- zzzz-none-000/linux-4.9.276/arch/mips/include/asm/string.h	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/arch/mips/include/asm/string.h	2023-04-05 08:19:00.000000000 +0000
@@ -140,4 +140,42 @@
 #define __HAVE_ARCH_MEMMOVE
 extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
 
+#ifndef __ZBOOT__
+#define memset(__s, __c, len)                                          \
+	({                                                             \
+		size_t __len = (len);                                  \
+		void *__ret;                                           \
+		if (__builtin_constant_p(len) && __len >= 64)          \
+			__ret = memset((__s), (__c), __len);           \
+		else                                                   \
+			__ret = __builtin_memset((__s), (__c), __len); \
+		__ret;                                                 \
+	})
+
+#define memcpy(dst, src, len)                                          \
+	({                                                             \
+		size_t __len = (len);                                  \
+		void *__ret;                                           \
+		if (__builtin_constant_p(len) && __len >= 64)          \
+			__ret = memcpy((dst), (src), __len);           \
+		else                                                   \
+			__ret = __builtin_memcpy((dst), (src), __len); \
+		__ret;                                                 \
+	})
+
+#define memmove(dst, src, len)                                          \
+	({                                                              \
+		size_t __len = (len);                                   \
+		void *__ret;                                            \
+		if (__builtin_constant_p(len) && __len >= 64)           \
+			__ret = memmove((dst), (src), __len);           \
+		else                                                    \
+			__ret = __builtin_memmove((dst), (src), __len); \
+		__ret;                                                  \
+	})
+
+#define __HAVE_ARCH_MEMCMP
+#define memcmp(src1, src2, len) __builtin_memcmp((src1), (src2), (len))
+#endif
+
 #endif /* _ASM_STRING_H */