m68k: mark PMD folded and expose number of page table levels
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tue, 14 Apr 2015 22:45:48 +0000 (15:45 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 14 Apr 2015 23:49:02 +0000 (16:49 -0700)
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: Geert Uytterhoeven <geert@linux-m68k.org>
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>
arch/m68k/Kconfig

index 87b7c75..2dd8f63 100644 (file)
@@ -67,6 +67,10 @@ config HZ
        default 1000 if CLEOPATRA
        default 100
 
+config PGTABLE_LEVELS
+       default 2 if SUN3 || COLDFIRE
+       default 3
+
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"