[PATCH v2 4/7] mm/hwpoison: replacing atomic_long_sub() with atomic_long_dec()

[Wanpeng Li]

Repalce atomic_long_sub() with atomic_long_dec() since the page is 
normal page instead of hugetlbfs page or thp.

Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
---
 mm/memory-failure.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index a6c4752..297965e 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -1363,7 +1363,7 @@ int unpoison_memory(unsigned long pfn)
 			return 0;
 		}
 		if (TestClearPageHWPoison(p))
-			atomic_long_sub(nr_pages, &num_poisoned_pages);
+			atomic_long_dec(&num_poisoned_pages);
 		pr_info("MCE: Software-unpoisoned free page %#lx\n", pfn);
 		return 0;
 	}
-- 
1.8.1.2

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