[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>

3 files changed, 6 insertions, 2 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)
diff --git a/include/asm-generic/pgtable-nopmd.h b/include/asm-generic/pgtable-nopmd.h
index c8d53ba20e19..29ff5d84d8c3 100644
--- a/include/asm-generic/pgtable-nopmd.h
+++ b/include/asm-generic/pgtable-nopmd.h
@@ -47,7 +47,7 @@ static inline pmd_t * pmd_offset(pud_t * pud, unsigned long address)
 #define __pmd(x)                                ((pmd_t) { __pud(x) } )
 
 #define pud_page(pud)                           (pmd_page((pmd_t){ pud }))
-#define pud_page_kernel(pud)                    (pmd_page_kernel((pmd_t){ pud }))
+#define pud_page_vaddr(pud)                     (pmd_page_vaddr((pmd_t){ pud }))
 
 /*
  * allocating and freeing a pmd is trivial: the 1-entry pmd is
diff --git a/include/asm-generic/pgtable-nopud.h b/include/asm-generic/pgtable-nopud.h
index 82e29f0ce467..566464500558 100644
--- a/include/asm-generic/pgtable-nopud.h
+++ b/include/asm-generic/pgtable-nopud.h
@@ -44,7 +44,7 @@ static inline pud_t * pud_offset(pgd_t * pgd, unsigned long address)
 #define __pud(x)                                ((pud_t) { __pgd(x) } )
 
 #define pgd_page(pgd)                           (pud_page((pud_t){ pgd }))
-#define pgd_page_kernel(pgd)                    (pud_page_kernel((pud_t){ pgd }))
+#define pgd_page_vaddr(pgd)                     (pud_page_vaddr((pud_t){ pgd }))
 
 /*
  * allocating and freeing a pud is trivial: the 1-entry pud is