linux-kernel - Re: commit 4dd1837d7589f468ed109556513f476e7a7f9121 breaks build

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Date:   Sun, 20 Nov 2016 14:02:17 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Russell King - ARM Linux <linux@...linux.org.uk>
Cc:     Tobias Jakobi <tjakobi@...h.uni-bielefeld.de>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        viro@...iv.linux.org.uk,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: commit 4dd1837d7589f468ed109556513f476e7a7f9121 breaks build

On Sun, Nov 20, 2016 at 12:34:22PM +0000, Russell King - ARM Linux wrote:
> On Sun, Nov 20, 2016 at 12:43:38PM +0100, Tobias Jakobi wrote:
> > Hello Russell,
> > 
> > Russell King - ARM Linux wrote:
> > > None of the autobuilders are finding this problem, and they build a
> > > wide range of configurations.  Maybe it's something specific to how
> > > you're building the kernel - can you give step by step instructions
> > > how to reproduce this please?
> > Just using plain make here, no cross-compiler or anything involved. gcc
> > is version 4.9.4.
> 
> Hmm.  The commit you mention was merged during the merge window, so
> anyone building 4.9-rc1 or later should be seeing this problem, but
> they aren't.  I've built many kernels post -rc1, and I'm not seeing
> the problem with my 4.7.4 cross compiler.
> 

I have the same issue here on all my Allwinner ARM device.
I have not reported this issue since I believed to see some report of it.

I cross compile with armv7a-hardfloat-linux-gnueabi-4.9.3.

With CONFIG_UNUSED_SYMBOLS set, the issue disapear

Regards