Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[sfrench/cifs-2.6.git] / mm / ksm.c

diff --git a/mm/ksm.c b/mm/ksm.c
index e8d6c6210b80c305da1481c7be54680e6459c866..e3cbf9a92f3cdd9519f7724f152d816cd22f3a44 100644 (file)
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -1131,6 +1131,13 @@ static int replace_page(struct vm_area_struct *vma, struct page *page,
        } else {
                newpte = pte_mkspecial(pfn_pte(page_to_pfn(kpage),
                                               vma->vm_page_prot));
+               /*
+                * We're replacing an anonymous page with a zero page, which is
+                * not anonymous. We need to do proper accounting otherwise we
+                * will get wrong values in /proc, and a BUG message in dmesg
+                * when tearing down the mm.
+                */
+               dec_mm_counter(mm, MM_ANONPAGES);
        }
 
        flush_cache_page(vma, addr, pte_pfn(*ptep));