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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-05 11:31:06 -0800 |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2009-02-06 12:31:50 -0800 |
| commit | 346309cff6127a38731cf102de3413a562700b84 (patch) | |
| tree | 47e2c646b21d3637640b4d93b4ae6485aa4f9fa2 /arch/x86/include/asm/pgtable.h | |
| parent | 97e2817d3423d753fd2f80ea936a370032846382 (diff) | |
| download | talos-obmc-linux-346309cff6127a38731cf102de3413a562700b84.tar.gz talos-obmc-linux-346309cff6127a38731cf102de3413a562700b84.zip | |
x86: unify pte_index
Impact: cleanup
Unify and demacro pte_index.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/include/asm/pgtable.h')
| -rw-r--r-- | arch/x86/include/asm/pgtable.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 49b5cff78c28..10a8c2e51789 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -498,6 +498,17 @@ static inline unsigned pmd_index(unsigned long address) */ #define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot)) +/* + * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE] + * + * this function returns the index of the entry in the pte page which would + * control the given virtual address + */ +static inline unsigned pte_index(unsigned long address) +{ + return (address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1); +} + #if PAGETABLE_LEVELS > 2 static inline int pud_present(pud_t pud) { |
