linux-kernel - RE: [PATCH v8 1/1] PRUSS UIO driver support

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Date:	Thu, 3 Mar 2011 14:59:42 +0530
From:	"TK, Pratheesh Gangadhar" <pratheesh@...com>
To:	Thomas Gleixner <tglx@...utronix.de>, Arnd Bergmann <arnd@...db.de>
CC:	"Hans J. Koch" <hjk@...sjkoch.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"gregkh@...e.de" <gregkh@...e.de>,
	"sshtylyov@...sta.com" <sshtylyov@...sta.com>,
	"Chatterjee, Amit" <amit.chatterjee@...com>,
	"davinci-linux-open-source@...ux.davincidsp.com" 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: [PATCH v8 1/1] PRUSS UIO driver support


Hi,
> -----Original Message-----
> From: Thomas Gleixner [mailto:tglx@...utronix.de]
> Sent: Thursday, March 03, 2011 2:27 AM
> On Wed, 2 Mar 2011, Arnd Bergmann wrote:
> 
> > On Wednesday 02 March 2011 21:09:56 Hans J. Koch wrote:
> > > > +static struct uio_info *info;
> > > > +static dma_addr_t sram_paddr, ddr_paddr;
> > > > +static void *prussio_vaddr, *sram_vaddr, *ddr_vaddr;
> > >
> > > So the correct thing would be
> > >
> > > static void __iomem *prussio_vaddr;
> > > static void *sram_vaddr, *ddr_vaddr;
> >
> > I also commented that it should not be a global variable at
> > all, but a dynamic data structure referenced from the device.
> >
> > Not important, but Pratheesh said he'd change it. If it stays
> > a global variable, I'd at least expect an explanation why
> > the static variable is considered better in this case.
> 
> I did not pick at that, because there is no indicator that we'll see
> more than one PRUSS unit per SoC in the forseeable future.
> 
It's a possibility - May be in 2-3 years time.

Thanks,
Pratheesh

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