tile: expose number of page table levels

We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.

Signed-off-by: Kirill A. Shutemov <[email protected]>
Acked-by: Chris Metcalf <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 7cca41842a9e5acc9382f73896278f3404772eb3..0142d578b5a84d5277e7bdf81510aba80dc9ff9a 100644 (file)
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -147,6 +147,11 @@ config ARCH_DEFCONFIG
        default "arch/tile/configs/tilepro_defconfig" if !TILEGX
        default "arch/tile/configs/tilegx_defconfig" if TILEGX
 
+config PGTABLE_LEVELS
+       int
+       default 3 if 64BIT
+       default 2
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"