[S390] 1K/2K page table pages.

This patch implements 1K/2K page table pages for s390.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/mmu.h b/include/asm-s390/mmu.h
index ccd36d2..13ec421 100644
--- a/include/asm-s390/mmu.h
+++ b/include/asm-s390/mmu.h
@@ -1,7 +1,11 @@
 #ifndef __MMU_H
 #define __MMU_H
 
-/* Default "unsigned long" context */
-typedef unsigned long mm_context_t;
+typedef struct {
+	struct list_head crst_list;
+	struct list_head pgtable_list;
+	unsigned long asce_bits;
+	int noexec;
+} mm_context_t;
 
 #endif