Date: Fri, 30 Nov 2012 02:47:55 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Lin Feng <linfeng@cn.fujitsu.com>
Cc: viro@zeniv.linux.org.uk, bcrl@kvack.org, kamezawa.hiroyu@jp.fujitsu.com,
        mhocko@suse.cz, hughd@google.com, cl@linux.com, mgorman@suse.de,
        minchan@kernel.org, isimatu.yasuaki@jp.fujitsu.com,
        laijs@cn.fujitsu.com, wency@cn.fujitsu.com, tangchen@cn.fujitsu.com,
        linux-fsdevel@vger.kernel.org, linux-aio@kvack.org, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org
Subject: Re: [BUG REPORT] [mm-hotplug, aio] aio ring_pages can't be offlined
Message-Id: <20121130024755.b5dae17e.akpm@linux-foundation.org>
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On Fri, 30 Nov 2012 18:29:30 +0800 Lin Feng <linfeng@cn.fujitsu.com> wrote:

> > add a new library function which callers can use before (or after?)
> > calling get_user_pages[_fast]().
> Sorry, I'm not quite understand what "library function" function means..
> Does it means a function aids get_user_pages() or totally wraps/replaces 
> get_user_pages(), or none of above?

"library function" is terminology for a general facility which
the core kernel makes available to other parts of the kernel. 
get_user_pages() is a library function, as are the functions in lib/,
etc.  "grep EXPORT_SYMBOL ./*/*.c"


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