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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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9
include/asm-parisc/pgtable.h
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@ -303,7 +303,8 @@ static inline void pmd_clear(pmd_t *pmd) {
#if PT_NLEVELS == 3
#define pgd_page(pgd) ((unsigned long) __va(pgd_address(pgd)))
#define pgd_page_vaddr(pgd) ((unsigned long) __va(pgd_address(pgd)))
#define pgd_page(pgd) virt_to_page((void *)pgd_page_vaddr(pgd))
/* For 64 bit we have three level tables */
@ -382,7 +383,7 @@ extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_address(pmd)))
#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_address(pmd)))
#define __pmd_page(pmd) ((unsigned long) __va(pmd_address(pmd)))
#define pmd_page(pmd) virt_to_page((void *)__pmd_page(pmd))
@ -400,7 +401,7 @@ extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
#if PT_NLEVELS == 3
#define pmd_offset(dir,address) \
((pmd_t *) pgd_page(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
((pmd_t *) pgd_page_vaddr(*(dir)) + (((address)>>PMD_SHIFT) & (PTRS_PER_PMD-1)))
#else
#define pmd_offset(dir,addr) ((pmd_t *) dir)
#endif
@ -408,7 +409,7 @@ extern inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
/* Find an entry in the third-level page table.. */
#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1))
#define pte_offset_kernel(pmd, address) \
((pte_t *) pmd_page_kernel(*(pmd)) + pte_index(address))
((pte_t *) pmd_page_vaddr(*(pmd)) + pte_index(address))
#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address)
#define pte_offset_map_nested(pmd, address) pte_offset_kernel(pmd, address)
#define pte_unmap(pte) do { } while (0)