net: sched: do not requeue a NULL skb

[firefly-linux-kernel-4.4.55.git] / fs / proc / task_mmu.c

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 187b3b5f242ef946658751d15580a6c7e6ac85d6..f6478301db00bcd276f9c2ffb58908bc817928df 100644 (file)
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -1435,6 +1435,32 @@ static struct page *can_gather_numa_stats(pte_t pte, struct vm_area_struct *vma,
        return page;
 }
 
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+static struct page *can_gather_numa_stats_pmd(pmd_t pmd,
+                                             struct vm_area_struct *vma,
+                                             unsigned long addr)
+{
+       struct page *page;
+       int nid;
+
+       if (!pmd_present(pmd))
+               return NULL;
+
+       page = vm_normal_page_pmd(vma, addr, pmd);
+       if (!page)
+               return NULL;
+
+       if (PageReserved(page))
+               return NULL;
+
+       nid = page_to_nid(page);
+       if (!node_isset(nid, node_states[N_MEMORY]))
+               return NULL;
+
+       return page;
+}
+#endif
+
 static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
                unsigned long end, struct mm_walk *walk)
 {
@@ -1444,13 +1470,13 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
        pte_t *orig_pte;
        pte_t *pte;
 
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
        if (pmd_trans_huge_lock(pmd, vma, &ptl) == 1) {
-               pte_t huge_pte = *(pte_t *)pmd;
                struct page *page;
 
-               page = can_gather_numa_stats(huge_pte, vma, addr);
+               page = can_gather_numa_stats_pmd(*pmd, vma, addr);
                if (page)
-                       gather_stats(page, md, pte_dirty(huge_pte),
+                       gather_stats(page, md, pmd_dirty(*pmd),
                                     HPAGE_PMD_SIZE/PAGE_SIZE);
                spin_unlock(ptl);
                return 0;
@@ -1458,6 +1484,7 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
 
        if (pmd_trans_unstable(pmd))
                return 0;
+#endif
        orig_pte = pte = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
        do {
                struct page *page = can_gather_numa_stats(*pte, vma, addr);
@@ -1473,18 +1500,19 @@ static int gather_pte_stats(pmd_t *pmd, unsigned long addr,
 static int gather_hugetlb_stats(pte_t *pte, unsigned long hmask,
                unsigned long addr, unsigned long end, struct mm_walk *walk)
 {
+       pte_t huge_pte = huge_ptep_get(pte);
        struct numa_maps *md;
        struct page *page;
 
-       if (!pte_present(*pte))
+       if (!pte_present(huge_pte))
                return 0;
 
-       page = pte_page(*pte);
+       page = pte_page(huge_pte);
        if (!page)
                return 0;
 
        md = walk->private;
-       gather_stats(page, md, pte_dirty(*pte), 1);
+       gather_stats(page, md, pte_dirty(huge_pte), 1);
        return 0;
 }