--- mips/arch/mips/Kconfig-orig
+++ mips/arch/mips/Kconfig

@@ -46,6 +46,7 @@
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_BIG_ENDIAN
 	select SYS_SUPPORTS_LITTLE_ENDIAN
+        select BOARD_HAS_MEMCPY_PREFETCH_BUG
 	help
 	  This enables support for the MIPS Technologies Malta evaluation
 	  board.
@@ -777,6 +778,10 @@
 config CPU_HAS_PREFETCH
 	bool
 
+config BOARD_HAS_MEMCPY_PREFETCH_BUG
+	bool
+	default n
+
 config SB1_PASS_1_WORKAROUNDS
 	bool
 	depends on CPU_SB1_PASS_1

--- mips/arch/mips/lib/memcpy.S-orig
+++ mips/arch/mips/lib/memcpy.S

@@ -17,6 +17,11 @@
 #include <asm/offset.h>
 #include <asm/regdef.h>
 
+#ifdef CONFIG_BOARD_HAS_MEMCPY_PREFETCH_BUG
+#undef PREF
+#define PREF(hint,addr)
+#endif
+	
 #define dst a0
 #define src a1
 #define len a2