linux-kernel - Re: [PATCH v2 4/7] mm/hwpoison: replacing atomic_long_sub() with atomic_long

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Date:	Fri, 23 Aug 2013 10:35:12 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Andi Kleen <andi@...stfloor.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Tony Luck <tony.luck@...el.com>, gong.chen@...ux.intel.com,
	linux-mm@...ck.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/7] mm/hwpoison: replacing atomic_long_sub() with
 atomic_long_dec()

On Fri, Aug 23, 2013 at 06:30:38PM +0800, Wanpeng Li wrote:
> 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@...ux.vnet.ibm.com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>

> ---
>  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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