linux-kernel - Re: [PATCH v4 0/7] lib/lzo: performance improvements

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Date:   Wed, 5 Dec 2018 09:50:32 +0000
From:   Dave Rodgman <dave.rodgman@....com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Matt Sealey <Matt.Sealey@....com>,
        "nitingupta910@...il.com" <nitingupta910@...il.com>,
        "markus@...rhumer.com" <markus@...rhumer.com>,
        "minchan@...nel.org" <minchan@...nel.org>,
        "sonnyrao@...gle.com" <sonnyrao@...gle.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        nd <nd@....com>, "sfr@...b.auug.org.au" <sfr@...b.auug.org.au>
Subject: Re: [PATCH v4 0/7] lib/lzo: performance improvements

On 05/12/2018 7:30 am, Sergey Senozhatsky wrote:
> Hi Dave,
> 
> Notices this warning today:
> 
> 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]
> 239 |   m_off = ip - m_pos;
> 
> Care to take a look? (could be false positive)

Hi Sergey,

This warning (it's a false positive only seen with gcc) was fixed by v4 of this patchset. I've just tested the latest 
linux-next/master (next-20181205) and it doesn't have this issue.

cheers

Dave