[PATCH] i386: little pgtable.h consolidation vs 2/3level

Join together some common functions (pmd_page{,_kernel}) over 2level and
3level pages.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/asm-i386/pgtable.h b/include/asm-i386/pgtable.h
index 0e3ec809352d..38ec33eb6f12 100644
--- a/include/asm-i386/pgtable.h
+++ b/include/asm-i386/pgtable.h
@@ -369,6 +369,11 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 #define pte_offset_kernel(dir, address) \
         ((pte_t *) pmd_page_kernel(*(dir)) +  pte_index(address))
 
+#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+
+#define pmd_page_kernel(pmd) \
+                ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
 /*
  * Helper function that returns the kernel pagetable entry controlling
  * the virtual address 'address'. NULL means no pagetable entry present.