m68k: mark PMD folded and 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: 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>

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 87b7c7581b1dd5777642a3b87dd9002b7e68dc50..2dd8f63bfbbb7850e7e797eb108f708eb1fc6d54 100644 (file)
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -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"