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[S390] fix page table walk for changing page attributes

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The page table walk for changing page attributes used the wrong
address for pgd/pud/pmd lookups if the range was bigger than
a pmd entry. Fix the lookup by using the correct address.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2011-04-20 10:15:32 +02:00 committed by Martin Schwidefsky
parent c708c57e24
commit e4c031b4f2
1 changed files with 3 additions and 2 deletions
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5
arch/s390/mm/pageattr.c
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@ -24,12 +24,13 @@ static void change_page_attr(unsigned long addr, int numpages,
WARN_ON_ONCE(1);
continue;
}
ptep = pte_offset_kernel(pmdp, addr + i * PAGE_SIZE);
ptep = pte_offset_kernel(pmdp, addr);
pte = *ptep;
pte = set(pte);
ptep_invalidate(&init_mm, addr + i * PAGE_SIZE, ptep);
ptep_invalidate(&init_mm, addr, ptep);
*ptep = pte;
addr += PAGE_SIZE;
}
}