HWPOISON: avoid grabbing the page count multiple times during madvise injection

If page is double referenced in madvise_hwpoison() and __memory_failure(),
remove_mapping() will fail because it expects page_count=2. Fix it by
not grabbing extra page count in __memory_failure().

Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/mm/madvise.c b/mm/madvise.c
index 35b1479b7c9d..18970aec0d2f 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -238,7 +238,6 @@ static int madvise_hwpoison(unsigned long start, unsigned long end)
                        page_to_pfn(p), start);
                 /* Ignore return value for now */
                 __memory_failure(page_to_pfn(p), 0, 1);
-                put_page(p);
         }
         return ret;
 }