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

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Message-ID: <20181205102001.GA453@jagdpanzerIV>
Date:   Wed, 5 Dec 2018 19:20:01 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Dave Rodgman <dave.rodgman@....com>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        "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 (12/05/18 09:50), Dave Rodgman wrote:
> > 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,

Hi,

> This warning (it's a false positive only seen with gcc) was fixed
> by v4 of this patchset.

OK, cool.

> I've just tested the latest linux-next/master (next-20181205)
> and it doesn't have this issue.

Indeed.

	-ss