Merge branch 'akpm' (Andrew's patch-bomb)

Merge misc fixes from Andrew Morton.

* emailed from Andrew Morton <akpm@linux-foundation.org>: (8 patches)
  MAINTAINERS: add maintainer for LED subsystem
  mm: nobootmem: fix sign extend problem in __free_pages_memory()
  drivers/leds: correct __devexit annotations
  memcg: free spare array to avoid memory leak
  namespaces, pid_ns: fix leakage on fork() failure
  hugetlb: prevent BUG_ON in hugetlb_fault() -> hugetlb_cow()
  mm: fix division by 0 in percpu_pagelist_fraction()
  proc/pid/pagemap: correctly report non-present ptes and holes between vmas

1 files changed, 10 insertions, 2 deletions

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 2d60492d6df..1030a716d15 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -747,6 +747,8 @@ static void pte_to_pagemap_entry(pagemap_entry_t *pme, pte_t pte)
         else if (pte_present(pte))
                 *pme = make_pme(PM_PFRAME(pte_pfn(pte))
                                 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+        else
+                *pme = make_pme(PM_NOT_PRESENT);
 }
 
 #ifdef CONFIG_TRANSPARENT_HUGEPAGE
@@ -761,6 +763,8 @@ static void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
         if (pmd_present(pmd))
                 *pme = make_pme(PM_PFRAME(pmd_pfn(pmd) + offset)
                                 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+        else
+                *pme = make_pme(PM_NOT_PRESENT);
 }
 #else
 static inline void thp_pmd_to_pagemap_entry(pagemap_entry_t *pme,
@@ -801,8 +805,10 @@ static int pagemap_pte_range(pmd_t *pmd, unsigned long addr, unsigned long end,
 
                 /* check to see if we've left 'vma' behind
                  * and need a new, higher one */
-                if (vma && (addr >= vma->vm_end))
+                if (vma && (addr >= vma->vm_end)) {
                         vma = find_vma(walk->mm, addr);
+                        pme = make_pme(PM_NOT_PRESENT);
+                }
 
                 /* check that 'vma' actually covers this address,
                  * and that it isn't a huge page vma */
@@ -830,6 +836,8 @@ static void huge_pte_to_pagemap_entry(pagemap_entry_t *pme,
         if (pte_present(pte))
                 *pme = make_pme(PM_PFRAME(pte_pfn(pte) + offset)
                                 | PM_PSHIFT(PAGE_SHIFT) | PM_PRESENT);
+        else
+                *pme = make_pme(PM_NOT_PRESENT);
 }
 
 /* This function walks within one hugetlb entry in the single call */
@@ -839,7 +847,7 @@ static int pagemap_hugetlb_range(pte_t *pte, unsigned long hmask,
 {
         struct pagemapread *pm = walk->private;
         int err = 0;
-        pagemap_entry_t pme = make_pme(PM_NOT_PRESENT);
+        pagemap_entry_t pme;
 
         for (; addr != end; addr += PAGE_SIZE) {
                 int offset = (addr & ~hmask) >> PAGE_SHIFT;