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@xxxxxxxxxxxxxxx> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> Cc: Paul Mackerras <paulus@xxxxxxxxx> Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx> --- v2: s/64K_PAGES/PPC_64K_PAGES/ --- arch/powerpc/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 22b0940494bb..91ad76f30d18 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 PPC_64K_PAGES + default 4 + source "init/Kconfig" source "kernel/Kconfig.freezer" -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>