linux-kernel - Re: linux-next: build warning after merge of the akpm tree

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Message-ID: <51cdffd4-8e89-0366-a13d-154b2cbfb69a@arm.com>
Date:   Fri, 30 Nov 2018 14:52:10 +0000
From:   Dave Rodgman <dave.rodgman@....com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the akpm tree

On 30/11/2018 5:40 am, Stephen Rothwell wrote:
> After merging the akpm tree, today's linux-next build (arm
> multi_v7_defconfig) produced this warning:
>
> lib/lzo/lzo1x_compress.c: In function 'lzo1x_1_do_compress':
> lib/lzo/lzo1x_compress.c:239:14: warning: 'm_pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
>     m_off = ip - m_pos;
>             ~~~^~~~~~~
> Probably introduced by patch
>
>    "lib/lzo: implement run-length encoding"
> or
>    "lib/lzo: separate lzo-rle from lzo"

Apologies, I didn't spot this (I think it's gcc only - clang, which I
was testing with, seems smart enough not to report this false positive).

I've fixed it in the latest patchset (v4):

https://lkml.org/lkml/2018/11/30/972

Dave
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