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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 <[email protected]>
Cc: Hugh Dickins <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Dave McCracken 2006-09-25 23:31:48 -07:00 • committed by Linus Torvalds
commit 46a82b2d55
39 changed files with 117 additions and 90 deletions
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5
include/asm-sparc64/pgtable.h
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@ -630,8 +630,9 @@ static inline unsigned long pte_present(pte_t pte)
#define __pmd_page(pmd) \
((unsigned long) __va((((unsigned long)pmd_val(pmd))<<11UL)))
#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
#define pud_page(pud) \
#define pud_page_vaddr(pud) \
((unsigned long) __va((((unsigned long)pud_val(pud))<<11UL)))
#define pud_page(pud) virt_to_page((void *)pud_page_vaddr(pud))
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) (0)
#define pmd_present(pmd) (pmd_val(pmd) != 0U)
@ -653,7 +654,7 @@ static inline unsigned long pte_present(pte_t pte)
/* Find an entry in the second-level page table.. */
#define pmd_offset(pudp, address) \
((pmd_t *) pud_page(*(pudp)) + \
((pmd_t *) pud_page_vaddr(*(pudp)) + \
(((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)))
/* Find an entry in the third-level page table.. */