sh: Abstract the number of page table levels

Keep the dimensions of the page tables in a separate header file in
preparation for allowing a three level page table structure.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 3 insertions, 21 deletions

diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
index 63ca37bd9a95..fe9f037ac5fd 100644
--- a/arch/sh/include/asm/pgalloc.h
+++ b/arch/sh/include/asm/pgalloc.h
@@ -4,9 +4,10 @@
 #include <linux/quicklist.h>
 #include <asm/page.h>
 
-#define QUICK_PGD 0	/* We preserve special mappings over free */
 #define QUICK_PT 1	/* Other page table pages that are zero on free */
 
+#include <asm/pgalloc_nopmd.h>
+
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
 				       pte_t *pte)
 {
@@ -20,28 +21,9 @@ static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
 }
 #define pmd_pgtable(pmd) pmd_page(pmd)
 
-static inline void pgd_ctor(void *x)
-{
-	pgd_t *pgd = x;
-
-	memcpy(pgd + USER_PTRS_PER_PGD,
-	       swapper_pg_dir + USER_PTRS_PER_PGD,
-	       (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
-}
-
 /*
  * Allocate and free page tables.
  */
-static inline pgd_t *pgd_alloc(struct mm_struct *mm)
-{
-	return quicklist_alloc(QUICK_PGD, GFP_KERNEL | __GFP_REPEAT, pgd_ctor);
-}
-
-static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
-{
-	quicklist_free(QUICK_PGD, NULL, pgd);
-}
-
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 					  unsigned long address)
 {
@@ -81,7 +63,7 @@ do {							\
 
 static inline void check_pgt_cache(void)
 {
-	quicklist_trim(QUICK_PGD, NULL, 25, 16);
+	__check_pgt_cache();
 	quicklist_trim(QUICK_PT, NULL, 25, 16);
 }