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.shute...@linux.intel.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/Kconfig | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 22b0940494bb..4c0c744fa297 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
+config PGTABLE_LEVELS
+ int
+ default 2 if !PPC64
+ default 3 if 64K_PAGES
+ default 4
+
source "init/Kconfig"
source "kernel/Kconfig.freezer"
--
2.1.4
--
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