[PATCH] freepgt: hugetlb area is clean

Once we're strict about clearing away page tables, hugetlb_prefault can assume
there are no page tables left within its range.  Since the other arches
continue if !pte_none here, let i386 do the same.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 2 insertions, 9 deletions

diff --git a/arch/i386/mm/hugetlbpage.c b/arch/i386/mm/hugetlbpage.c
index a8c45143088..171fc925e1e 100644
--- a/arch/i386/mm/hugetlbpage.c
+++ b/arch/i386/mm/hugetlbpage.c
@@ -249,15 +249,8 @@ int hugetlb_prefault(struct address_space *mapping, struct vm_area_struct *vma)
                         goto out;
                 }
 
-                if (!pte_none(*pte)) {
-                        pmd_t *pmd = (pmd_t *) pte;
-
-                        page = pmd_page(*pmd);
-                        pmd_clear(pmd);
-                        mm->nr_ptes--;
-                        dec_page_state(nr_page_table_pages);
-                        page_cache_release(page);
-                }
+                if (!pte_none(*pte))
+                        continue;
 
                 idx = ((addr - vma->vm_start) >> HPAGE_SHIFT)
                         + (vma->vm_pgoff >> (HPAGE_SHIFT - PAGE_SHIFT));