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um: expose number of page table levels

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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>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Jeff Dike <jdike@addtoit.com>
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>
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Kirill A. Shutemov 2015-04-14 15:46:11 -07:00 committed by Linus Torvalds
parent 909d45e628
commit 6b8ce2a1a4
1 changed files with 5 additions and 0 deletions
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arch/um/Kconfig.um
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@ -155,3 +155,8 @@ config MMAPPER
config NO_DMA
def_bool y
config PGTABLE_LEVELS
int
default 3 if 3_LEVEL_PGTABLES
default 2