linux-kernel - Re: [PATCH 18/46] kernel: Mark functions as static in sched/fair.c

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Date:	Fri, 28 Feb 2014 09:58:52 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	josh@...htriplett.org
Cc:	Rashika Kheria <rashika.kheria@...il.com>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH 18/46] kernel: Mark functions as static in sched/fair.c

On Thu, Feb 27, 2014 at 03:09:05PM -0800, josh@...htriplett.org wrote:
> On Thu, Feb 27, 2014 at 08:24:35PM +0100, Peter Zijlstra wrote:
> > On Thu, Feb 27, 2014 at 08:03:22AM -0800, Josh Triplett wrote:
> > > Did you perhaps check, and notice that there are *zero* uses of this
> > > function in the kernel?  Nothing overrides this weak symbol; it is no
> > > longer needed.  You removed the one and only user in your commit:
> > 
> > I know that; but you don't get to remove interfaces under the guise of a
> > static checker and without mention of such in the changelog.
> 
> So the changelog message needed improvement.  Got it; that would have
> been helpful to hear.
> 
> The kernel hardly goes to great lengths to preserve old interfaces with
> no users (per stable_api_nonsense), and the commit message already stated
> that the function was being marked as static because it wasn't used
> elsewhere.  But sure, perhaps something like the following, added to the
> commit message, would address your concern?
> 
> """
> arch_scale_smt_power, in particular, is a __weak function provided for
> architectures to override.  However, the only overriding definition was
> removed before v3.6, in commit ee08d1284ea9235b29bd2d9b7493b4b4cf3da09c
> ("sched/x86: Remove broken power estimation").  Thus, drop the __weak
> and make the function static.
> """
> 
> Or would you prefer to see it completely eliminated (inlining it into
> its caller) as part of the same patch?

Also remove the arch_ prefix, its not longer an arch function if you
make it static, is it.
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