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mm/hugetlb: set PTE as huge in hugetlb_change_protection and remove_migration_pte

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When setting a huge PTE, besides calling pte_mkhuge(), we also need to
call arch_make_huge_pte(), which we indeed do in make_huge_pte(), but we
forget to do in hugetlb_change_protection() and remove_migration_pte().

Signed-off-by: Zhigang Lu <zlu@tilera.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Hillf Danton <dhillf@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tony Lu 2013-02-04 14:28:46 -08:00 committed by Linus Torvalds
parent 3bdf8cd322
commit be7517d6ab
2 changed files with 4 additions and 1 deletions
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1
mm/hugetlb.c
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@ -3033,6 +3033,7 @@ unsigned long hugetlb_change_protection(struct vm_area_struct *vma,
if (!huge_pte_none(huge_ptep_get(ptep))) {
pte = huge_ptep_get_and_clear(mm, address, ptep);
pte = pte_mkhuge(pte_modify(pte, newprot));
pte = arch_make_huge_pte(pte, vma, NULL, 0);
set_huge_pte_at(mm, address, ptep, pte);
pages++;
}

4
mm/migrate.c
View file

@ -160,8 +160,10 @@ static int remove_migration_pte(struct page *new, struct vm_area_struct *vma,
if (is_write_migration_entry(entry))
pte = pte_mkwrite(pte);
#ifdef CONFIG_HUGETLB_PAGE
if (PageHuge(new))
if (PageHuge(new)) {
pte = pte_mkhuge(pte);
pte = arch_make_huge_pte(pte, vma, new, 0);
}
#endif
flush_cache_page(vma, addr, pte_pfn(pte));
set_pte_at(mm, addr, ptep, pte);