[PATCH] make each arch use mm/Kconfig

For all architectures, this just means that you'll see a "Memory Model"
choice in your architecture menu.  For those that implement DISCONTIGMEM,
you may eventually want to make your ARCH_DISCONTIGMEM_ENABLE a "def_bool
y" and make your users select DISCONTIGMEM right out of the new choice
menu.  The only disadvantage might be if you have some specific things that
you need in your help option to explain something about DISCONTIGMEM.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index ab79af8..32696c1 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -226,6 +226,8 @@
 	  This allows you to specify the maximum frame size a function may
 	  have without the compiler complaining about it.
 
+source "mm/Kconfig"
+
 comment "I/O subsystem configuration"
 
 config MACHCHK_WARNING