diff -urN linux.old/arch/mips/Kconfig linux.dev/arch/mips/Kconfig
--- linux.old/arch/mips/Kconfig 2006-11-29 22:57:37.000000000 +0100
+++ linux.dev/arch/mips/Kconfig 2006-12-14 04:09:50.000000000 +0100
-@@ -728,6 +728,19 @@
+@@ -780,6 +780,19 @@
select SYS_SUPPORTS_BIG_ENDIAN
select TOSHIBA_BOARDS
config TOSHIBA_RBTX4927
bool "Toshiba TBTX49[23]7 board"
select DMA_NONCOHERENT
-@@ -1015,7 +1028,7 @@
+@@ -1106,7 +1119,7 @@
config MIPS_L1_CACHE_SHIFT
int
-- default "4" if MACH_DECSTATION
-+ default "4" if MACH_DECSTATION || MIKROTIK_RB500
+- default "4" if MACH_DECSTATION || SNI_RM
++ default "4" if MACH_DECSTATION || SNI_RM || MIKROTIK_RB500
default "7" if SGI_IP27
default "5"