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 <[email protected]> Cc: Russell King <[email protected]> Tested-by: Guenter Roeck <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
ambv · Apr 14, 2015 · 1bcad26 · 1bcad26
1 parent 9f25e6a
commit 1bcad26
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -286,6 +286,11 @@ config GENERIC_BUG
 	def_bool y
 	depends on BUG
 
+config PGTABLE_LEVELS
+	int
+	default 3 if ARM_LPAE
+	default 2
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"