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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2015-04-14 15:46:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-14 16:49:02 -0700 |
| commit | c81956c9cd587d36b87d4ab37c92016ebb79b517 (patch) | |
| tree | 84fc0995d9f6f745f9561a06f366d3fababdf6eb /arch/s390/Kconfig | |
| parent | 06ef42a16f2dd8480ada1be3a549e12b02c45915 (diff) | |
| download | lwn-c81956c9cd587d36b87d4ab37c92016ebb79b517.tar.gz lwn-c81956c9cd587d36b87d4ab37c92016ebb79b517.zip | |
s390: expose number of page table levels
We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.
Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.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>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 373cd5badf1c..f6aebcb7a0f8 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -155,6 +155,11 @@ config S390 config SCHED_OMIT_FRAME_POINTER def_bool y +config PGTABLE_LEVELS + int + default 4 if 64BIT + default 2 + source "init/Kconfig" source "kernel/Kconfig.freezer" |