mm/huge_memory: fix typo when updating mmu cache

There are three cases of update_mmu_cache() in the file, and the case in
function collapse_huge_page() has a typo, namely the last parameter used,
which is corrected based on the other two cases.

Due to the define of update_mmu_cache by X86, the only arch that
implements THP currently, the change here has no really crystal point, but
one or two minutes of efforts could be saved for those archs that are
likely to support THP in future.

Signed-off-by: Hillf Danton <dhillf@gmail.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7aa9a7fbd997c4f8036e38d286b90652fb2b132f..4298abaae153033caafe1f8ac641fdef1dee097e 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1967,7 +1967,7 @@ static void collapse_huge_page(struct mm_struct *mm,
        BUG_ON(!pmd_none(*pmd));
        page_add_new_anon_rmap(new_page, vma, address);
        set_pmd_at(mm, address, pmd, _pmd);
-       update_mmu_cache(vma, address, entry);
+       update_mmu_cache(vma, address, _pmd);
        prepare_pmd_huge_pte(pgtable, mm);
        mm->nr_ptes--;
        spin_unlock(&mm->page_table_lock);