Message-ID: <5479A76F.5050809@gmx.de>
Date: Sat, 29 Nov 2014 12:01:03 +0100
From: Lino Sanfilippo <LinoSanfilippo@gmx.de>
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To: Florian Fainelli <f.fainelli@gmail.com>,
        Sudip Mukherjee <sudipm.mukherjee@gmail.com>,
        Hisashi T Fujinaka <htodd@twofifty.com>
CC: Jeff Kirsher <jeffrey.t.kirsher@intel.com>,
        Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Bruce Allan <bruce.w.allan@intel.com>,
        Carolyn Wyborny <carolyn.wyborny@intel.com>,
        Don Skidmore <donald.c.skidmore@intel.com>,
        Greg Rose <gregory.v.rose@intel.com>,
        Matthew Vick <matthew.vick@intel.com>,
        John Ronciak <john.ronciak@intel.com>,
        Mitch Williams <mitch.a.williams@intel.com>,
        Linux NICS <linux.nics@intel.com>, e1000-devel@lists.sourceforge.net,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] e1000: remove unused variables
References: <1417065728-5592-1-git-send-email-sudipm.mukherjee@gmail.com> <alpine.NEB.2.11.1411262157110.1481@chris.i8u.org> <20141127130725.GA12406@sudip-PC> <54790537.809@gmail.com>
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On 29.11.2014 00:28, Florian Fainelli wrote:

> Also, if you do a read that is not stored in any return value, the
> compiler is now free to remove that actual read, 

This does not apply to reads from iomem (see "volatile" specifier in
readl()).

Regards,
Lino

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