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x86: prepare for the unification of the cpa code 

prepare for the unification of the cpa code, by unifying the
lookup_address() logic between 32-bit and 64-bit.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:33:59 +01:00
parent bbb09f5cfc
commit a5f55035f6
1 changed files with 3 additions and 8 deletions
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11
arch/x86/mm/pageattr_64.c
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@ -19,26 +19,21 @@ pte_t *lookup_address(unsigned long address, int *level)
pgd_t *pgd = pgd_offset_k(address);
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
if (pgd_none(*pgd))
return NULL;
pud = pud_offset(pgd, address);
if (!pud_present(*pud))
if (pud_none(*pud))
return NULL;
pmd = pmd_offset(pud, address);
if (!pmd_present(*pmd))
if (pmd_none(*pmd))
return NULL;
*level = 3;
if (pmd_large(*pmd))
return (pte_t *)pmd;
*level = 4;
pte = pte_offset_kernel(pmd, address);
if (pte && !pte_present(*pte))
pte = NULL;
return pte;
return pte_offset_kernel(pmd, address);
}
static struct page *