linux-kernel - Re: [PATCH RCFv2 1/7] mm: introduce and use PageOffline()

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Message-ID: <d9f6e3bc-5b36-4df6-e55a-d282eee9b050@redhat.com>
Date:   Mon, 30 Apr 2018 17:49:59 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Pavel Tatashin <pasha.tatashin@...cle.com>, linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dan Williams <dan.j.williams@...el.com>,
        Michal Hocko <mhocko@...e.com>, Jan Kara <jack@...e.cz>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Jérôme Glisse <jglisse@...hat.com>,
        Matthew Wilcox <mawilcox@...rosoft.com>,
        Souptick Joarder <jrdr.linux@...il.com>,
        Hugh Dickins <hughd@...gle.com>,
        Huang Ying <ying.huang@...el.com>,
        Miles Chen <miles.chen@...iatek.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Reza Arbab <arbab@...ux.vnet.ibm.com>,
        Mel Gorman <mgorman@...e.de>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>
Subject: Re: [PATCH RCFv2 1/7] mm: introduce and use PageOffline()


>>
>>>
>>> -static void __meminit __init_single_page(struct page *page, unsigned long pfn,
>>> +extern void __meminit init_single_page(struct page *page, unsigned long pfn,
>>
>> I've seen it in other places, but what is the point of having "extern" function in .c file?
> 
> I've seen it all over the place, that's why I am using it :) (as I
> basically had the same question). Can somebody answer that?

BTW I was looking at the wrong file (header). This of course has to go!


-- 

Thanks,

David / dhildenb