linux-kernel - Re: [PATCH] stable-fixup: hotplug: fix unused function warning

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Date:   Mon, 9 Jan 2017 12:47:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>, stable@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Dan Streetman <ddstreet@...e.org>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        Yu Zhao <yuzhao@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] stable-fixup: hotplug: fix unused function warning

On Mon, Jan 09, 2017 at 12:29:18PM +0100, Michal Hocko wrote:
> On Mon 09-01-17 11:47:50, Arnd Bergmann wrote:
> > The backport of upstream commit 777c6e0daebb ("hotplug: Make
> > register and unregister notifier API symmetric") to linux-4.4.y
> > introduced a harmless warning in 'allnoconfig' builds as spotted by
> > kernelci.org:
> > 
> > kernel/cpu.c:226:13: warning: 'cpu_notify_nofail' defined but not used [-Wunused-function]
> 
> Is this warning really worth bothering? Does any stable rely on warning
> free builds?

Yes, I watch it, it's a good indicator that I got a backport wrong.

thanks,

greg k-h