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[PATCH] Standardize pxx_page macros

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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>
This commit is contained in:
Dave McCracken 2006-09-25 23:31:48 -07:00 • committed by Linus Torvalds
parent d2e7b7d0aa
commit 46a82b2d55
39 changed files with 117 additions and 90 deletions
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4
include/asm-m32r/pgtable.h
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@ -336,7 +336,7 @@ static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
pmd_val(*pmdp) = (((unsigned long) ptep) & PAGE_MASK);
}
#define pmd_page_kernel(pmd) \
#define pmd_page_vaddr(pmd) \
((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
#ifndef CONFIG_DISCONTIGMEM
@ -358,7 +358,7 @@ static inline void pmd_set(pmd_t * pmdp, pte_t * ptep)
#define pte_index(address) \
(((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
#define pte_offset_kernel(dir, address) \
((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address))
((pte_t *)pmd_page_vaddr(*(dir)) + pte_index(address))
#define pte_offset_map(dir, address) \
((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address)