From mboxrd@z Thu Jan  1 00:00:00 1970
From: Felipe Balbi <balbi@ti.com>
Subject: Re: [PATCH 03/10] usb: phy: mv-u3d: switch over to writel/readl
Date: Mon, 21 Apr 2014 14:06:46 -0500
Message-ID: <20140421190646.GL22794@saruman.home>
References: <1398095812-14222-1-git-send-email-balbi@ti.com>
 <1398095812-14222-4-git-send-email-balbi@ti.com>
 <20140421190444.GF14470@kroah.com>
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To: Greg KH <greg@kroah.com>
Cc: Felipe Balbi <balbi@ti.com>, Linux USB Mailing List <linux-usb@vger.kernel.org>, Linux OMAP Mailing List <linux-omap@vger.kernel.org>, leigh@solinno.co.uk, Tony Lindgren <tony@atomide.com>

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On Mon, Apr 21, 2014 at 12:04:44PM -0700, Greg KH wrote:
> On Mon, Apr 21, 2014 at 10:56:45AM -0500, Felipe Balbi wrote:
> > by removing the _relaxed suffix, we can build
> > this driver in other architectures.
>=20
> Odd, why was the _relaxed variants used here at all?  Someone trying to
> optimize something ahead of time?

that has been there since its inception in commit
a67e76ac904cb48946262bf353f1df0d1b349368. My guess is that someone
wanted to avoid the memory barriers imposed by writel()/readl().

--=20
balbi

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