diff --git a/arch/microblaze/include/asm/string.h b/arch/microblaze/include/asm/string.h
index 34071a848b6a2..dbdb9eb4a733c 100644
--- a/arch/microblaze/include/asm/string.h
+++ b/arch/microblaze/include/asm/string.h
@@ -8,7 +8,9 @@
 
 #ifdef __KERNEL__
 
+#ifdef CONFIG_OPT_LIB_FUNCTION
 #define __HAVE_ARCH_MEMSET
+#endif
 #define __HAVE_ARCH_MEMCPY
 #define __HAVE_ARCH_MEMMOVE
 
diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c
index eb6c8988af027..615a2f8f53cbe 100644
--- a/arch/microblaze/lib/memset.c
+++ b/arch/microblaze/lib/memset.c
@@ -30,22 +30,7 @@
 #include <linux/compiler.h>
 #include <linux/string.h>
 
-#ifdef __HAVE_ARCH_MEMSET
-#ifndef CONFIG_OPT_LIB_FUNCTION
-void *memset(void *v_src, int c, __kernel_size_t n)
-{
-	char *src = v_src;
-
-	/* Truncate c to 8 bits */
-	c = (c & 0xFF);
-
-	/* Simple, byte oriented memset or the rest of count. */
-	while (n--)
-		*src++ = c;
-
-	return v_src;
-}
-#else /* CONFIG_OPT_LIB_FUNCTION */
+#ifdef CONFIG_OPT_LIB_FUNCTION
 void *memset(void *v_src, int c, __kernel_size_t n)
 {
 	char *src = v_src;
@@ -94,6 +79,5 @@ void *memset(void *v_src, int c, __kernel_size_t n)
 
 	return v_src;
 }
-#endif /* CONFIG_OPT_LIB_FUNCTION */
 EXPORT_SYMBOL(memset);
-#endif /* __HAVE_ARCH_MEMSET */
+#endif /* CONFIG_OPT_LIB_FUNCTION */