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powerpc: expose number of page table levels on Kconfig level

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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: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
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>
This commit is contained in:
Kirill A. Shutemov 2015-04-14 15:45:57 -07:00 committed by Linus Torvalds
parent f24ffde432
commit 06ef42a16f
1 changed files with 6 additions and 0 deletions
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6
arch/powerpc/Kconfig
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@ -297,6 +297,12 @@ config ZONE_DMA32
bool
default y if PPC64
config PGTABLE_LEVELS
int
default 2 if !PPC64
default 3 if PPC_64K_PAGES
default 4
source "init/Kconfig"
source "kernel/Kconfig.freezer"