tizen 2.3.1 release

[kernel/linux-3.0.git] / fs / proc / task_mmu.c

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index c7d4ee6..55a1f49 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -407,6 +407,9 @@ static int smaps_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
        } else {
                spin_unlock(&walk->mm->page_table_lock);
        }
+
+       if (pmd_trans_unstable(pmd))
+               return 0;
        /*
         * The mmap_sem held all the way back in m_start() is what
         * keeps khugepaged out of here and from collapsing things
@@ -505,6 +508,8 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
        struct page *page;
 
        split_huge_page_pmd(walk->mm, pmd);
+       if (pmd_trans_unstable(pmd))
+               return 0;
 
        pte = pte_offset_map_lock(vma->vm_mm, pmd, addr, &ptl);
        for (; addr != end; pte++, addr += PAGE_SIZE) {
@@ -516,6 +521,9 @@ static int clear_refs_pte_range(pmd_t *pmd, unsigned long addr,
                if (!page)
                        continue;
 
+               if (PageReserved(page))
+                       continue;
+
                /* Clear accessed and referenced bits. */
                ptep_test_and_clear_young(vma, addr, pte);
                ClearPageReferenced(page);
@@ -665,6 +673,8 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
        int err = 0;
 
        split_huge_page_pmd(walk->mm, pmd);
+       if (pmd_trans_unstable(pmd))
+               return 0;
 
        /* find the first VMA at or above 'addr' */
        vma = find_vma(walk->mm, addr);
@@ -956,6 +966,8 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
                spin_unlock(&walk->mm->page_table_lock);
        }
 
+       if (pmd_trans_unstable(pmd))
+               return 0;
        orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
        do {
                struct page *page = can_gather_numa_stats(*pte, md->vma, addr);