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>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index ef954384f53a6f58c547daf3239c6656589b47de..860ec211ddd667175eca0abb95e82a01cdaa8e1e 100644 (file)
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1952,7 +1952,7 @@ 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);