sh: Move page table allocation out of line
We also switched away from quicklists and instead moved to slab
caches. After benchmarking both implementations the difference is
negligible. The slab caches suit us better though because the size of a
pgd table is just 4 entries when we're using a 3-level page table layout
and quicklists always deal with pages.
Signed-off-by: Matt Fleming <matt@console-pimps.org>
diff --git a/arch/sh/include/asm/pgalloc.h b/arch/sh/include/asm/pgalloc.h
index 4ea2785..e106474 100644
--- a/arch/sh/include/asm/pgalloc.h
+++ b/arch/sh/include/asm/pgalloc.h
@@ -6,10 +6,13 @@
#define QUICK_PT 1 /* Other page table pages that are zero on free */
+extern pgd_t *pgd_alloc(struct mm_struct *);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
#ifdef CONFIG_PGTABLE_LEVELS_3
-#include <asm/pgalloc_pmd.h>
-#else
-#include <asm/pgalloc_nopmd.h>
+extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
+extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
+extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
#endif
static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
@@ -67,7 +70,6 @@
static inline void check_pgt_cache(void)
{
- __check_pgt_cache();
quicklist_trim(QUICK_PT, NULL, 25, 16);
}