Index: linux-mips/arch/mips/Kconfig
===================================================================
--- linux-mips.orig/arch/mips/Kconfig
+++ linux-mips/arch/mips/Kconfig
@@ -1225,6 +1225,7 @@ config CPU_TX49XX
 	bool "R49XX"
 	depends on SYS_HAS_CPU_TX49XX
 	select CPU_HAS_LLSC
+	select CPU_HAS_WB
 	select CPU_HAS_PREFETCH
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_64BIT_KERNEL