linux-kernel - Re: [PATCH] ring-buffer: Remove unused function __rb_data_page

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Message-ID: <CAD=FV=WR__wKn9EuQVnDsZdTyhxTL34WsgeqSkPPzG3H9rcpGg@mail.gmail.com>
Date:   Thu, 18 May 2017 12:48:40 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Ingo Molnar <mingo@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ring-buffer: Remove unused function __rb_data_page_index()

Hi,

On Thu, May 18, 2017 at 12:46 PM, Steven Rostedt <rostedt@...dmis.org> wrote:
> On Thu, 18 May 2017 12:40:02 -0700
> Doug Anderson <dianders@...omium.org> wrote:
>
>> Hi,
>>
>> This appears to have been introduced in 2009 by commit afbab76a62b6
>> ("ring-buffer: have read page swap increment counter with page
>> entries"), which removed the user of the function but not the function
>> itself.  If folks were so inclined, this could be picked back to
>> linux-stable, but I'm not sure it's worth it.
>
> It doesn't do anything but waste some disk space in the source
> repository. It's a static inline function, which means it's not created
> unless something calls it.
>
> Thus, not worth the stable churn.

Yup, that's sane.  I guess not much chance of someone trying to get
clang to run w/ no warnings by just picking stable patches.  ;-)

-Doug