[PATCH] Standardize pxx_page macros

One of the changes necessary for shared page tables is to standardize the
pxx_page macros.  pte_page and pmd_page have always returned the struct
page associated with their entry, while pte_page_kernel and pmd_page_kernel
have returned the kernel virtual address.  pud_page and pgd_page, on the
other hand, return the kernel virtual address.

Shared page tables needs pud_page and pgd_page to return the actual page
structures.  There are very few actual users of these functions, so it is
simple to standardize their usage.

Since this is basic cleanup, I am submitting these changes as a standalone
patch.  Per Hugh Dickins' comments about it, I am also changing the
pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning.

Signed-off-by: Dave McCracken <dmccr@us.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/asm-generic/4level-fixup.h b/include/asm-generic/4level-fixup.h
index 68c6fea994d9..7b88d3931e34 100644
--- a/include/asm-generic/4level-fixup.h
+++ b/include/asm-generic/4level-fixup.h
@@ -21,6 +21,10 @@
 #define pud_present(pud)                1
 #define pud_ERROR(pud)                  do { } while (0)
 #define pud_clear(pud)                  pgd_clear(pud)
+#define pud_val(pud)                    pgd_val(pud)
+#define pud_populate(mm, pud, pmd)      pgd_populate(mm, pud, pmd)
+#define pud_page(pud)                   pgd_page(pud)
+#define pud_page_vaddr(pud)             pgd_page_vaddr(pud)
 
 #undef pud_free_tlb
 #define pud_free_tlb(tlb, x)            do { } while (0)