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x86: unify pmd_index

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Impact: cleanup

Unify and demacro pmd_index.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge
2009-02-05 11:31:01 -08:00
parent 20063ca4eb
commit e24d7eee0b
3 changed files with 11 additions and 10 deletions
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11
arch/x86/include/asm/pgtable.h
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@@ -478,6 +478,17 @@ static inline struct page *pmd_page(pmd_t pmd)
return pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT);
}
/*
* the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
*
* this macro returns the index of the entry in the pmd page which would
* control the given virtual address
*/
static inline unsigned pmd_index(unsigned long address)
{
return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}
#if PAGETABLE_LEVELS > 2
static inline int pud_present(pud_t pud)
{