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Message-ID: <BLU436-SMTP444F92F1A1C7BB9FA01ED0807F0@phx.gbl>
Date: Wed, 12 Aug 2015 07:51:53 +0800
From: Wanpeng Li <wanpeng.li@...mail.com>
To: Andrew Morton <akpm@...ux-foundation.org>
CC: Naoya Horiguchi <n-horiguchi@...jp.nec.com>, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/5] mm/hwpoison: introduce put_hwpoison_page to put
refcount for memory error handling
On 8/12/15 7:24 AM, Andrew Morton wrote:
> On Mon, 10 Aug 2015 19:28:21 +0800 Wanpeng Li <wanpeng.li@...mail.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?
Indeed, thanks for your fix. :-)
Regards,
Wanpeng Li
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