arm: expose number of page table levels on Kconfig level
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 <kirill.shutemov@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index cf4c0c9..696cf3c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -286,6 +286,11 @@
def_bool y
depends on BUG
+config PGTABLE_LEVELS
+ int
+ default 3 if ARM_LPAE
+ default 2
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
