linux-kernel - Re: [PATCH] e1000: remove unused variables

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Message-ID: <5479A76F.5050809@gmx.de>
Date:	Sat, 29 Nov 2014 12:01:03 +0100
From:	Lino Sanfilippo <LinoSanfilippo@....de>
To:	Florian Fainelli <f.fainelli@...il.com>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Hisashi T Fujinaka <htodd@...fifty.com>
CC:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Matthew Vick <matthew.vick@...el.com>,
	John Ronciak <john.ronciak@...el.com>,
	Mitch Williams <mitch.a.williams@...el.com>,
	Linux NICS <linux.nics@...el.com>,
	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] e1000: remove unused variables

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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