Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...

[deliverable/linux.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index b8ce6f450956e6e3a9191cbf92afd1d490a32c9d..ae8f708e3d75acd9c64f495ea74b8f1cb5ecc2c3 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -532,7 +532,7 @@ static struct page *dequeue_huge_page_vma(struct hstate *h,
                                struct vm_area_struct *vma,
                                unsigned long address, int avoid_reserve)
 {
-       struct page *page;
+       struct page *page = NULL;
        struct mempolicy *mpol;
        nodemask_t *nodemask;
        struct zonelist *zonelist;
@@ -2498,7 +2498,6 @@ retry_avoidcopy:
                if (outside_reserve) {
                        BUG_ON(huge_pte_none(pte));
                        if (unmap_ref_private(mm, vma, old_page, address)) {
-                               BUG_ON(page_count(old_page) != 1);
                                BUG_ON(huge_pte_none(pte));
                                spin_lock(&mm->page_table_lock);
                                ptep = huge_pte_offset(mm, address & huge_page_mask(h));
@@ -2791,6 +2790,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
         * so no worry about deadlock.
         */
        page = pte_page(entry);
+       get_page(page);
        if (page != pagecache_page)
                lock_page(page);
 
@@ -2822,6 +2822,7 @@ out_page_table_lock:
        }
        if (page != pagecache_page)
                unlock_page(page);
+       put_page(page);
 
 out_mutex:
        mutex_unlock(&hugetlb_instantiation_mutex);