Date: Tue, 11 Aug 2015 16:24:49 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Wanpeng Li <wanpeng.li@hotmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 3/5] mm/hwpoison: introduce put_hwpoison_page to put
 refcount for memory error handling
Message-Id: <20150811162449.77212ec2a80258f5aff8a224@linux-foundation.org>
In-Reply-To: <BLU436-SMTP127AFDD347F96AC6BDED54C80700@phx.gbl>
References: <1439206103-86829-1-git-send-email-wanpeng.li@hotmail.com>
	<BLU436-SMTP127AFDD347F96AC6BDED54C80700@phx.gbl>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1066
Lines: 40

On Mon, 10 Aug 2015 19:28:21 +0800 Wanpeng Li <wanpeng.li@hotmail.com> wrote:

> Introduce put_hwpoison_page to put refcount for memory 
> error handling. 
> 
> ...
>
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -922,6 +922,27 @@ int get_hwpoison_page(struct page *page)
>  }
>  EXPORT_SYMBOL_GPL(get_hwpoison_page);
>  
> +/**
> + * put_hwpoison_page() - Put refcount for memory error handling:
> + * @page:	raw error page (hit by memory error)
> + */
> +void put_hwpoison_page(struct page *page)
> +{
> +	struct page *head = compound_head(page);
> +
> +	if (PageHuge(head)) {
> +		put_page(head);
> +		return;
> +	}
> +
> +	if (PageTransHuge(head))
> +		if (page != head)
> +			put_page(head);
> +
> +	put_page(page);
> +}
> +EXPORT_SYMBOL_GPL(put_hwpoison_page);

I don't believe the export is needed?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/