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>
diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
index 63ca37b..fe9f037 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 @@
}
#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 @@
static inline void check_pgt_cache(void)
{
- quicklist_trim(QUICK_PGD, NULL, 25, 16);
+ __check_pgt_cache();
quicklist_trim(QUICK_PT, NULL, 25, 16);
}