linux-kernel - Re: [PATCH] PXA27x UDC driver.

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Date:	Tue, 10 Jul 2007 18:16:40 +0200
From:	"Lothar Wassmann" <LW@...O-electronics.de>
To:	Rodolfo Giometti <giometti@...eenne.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Li Yang-r58472 <LeoLi@...escale.com>,
	linux-usb-devel@...ts.sourceforge.net,
	linux-arm-kernel@...ts.arm.linux.org.uk
Subject: Re: [PATCH] PXA27x UDC driver.

Hi,
> > > +static int
> > > +write_packet(volatile u32 * uddr, struct pxa27x_request *req, unsigned max)
> > 
> > Please review Documentation/volatile-considered-harmful.txt
> 
> The attibute volatile here is necessary in order to avoid getting the
> following warnings from the compiler:
> 
[...]
> 
> Do you know how I can resolve this?
> 
ioremap() the memory area for the UDC registers and use an __iomem
cookie.


Lothar Wassmann
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