linux-kernel - Re: [PATCH] ARM: allow, but warn, when issuing ioremap() on RAM

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Date:	Fri, 8 Oct 2010 17:54:22 -0700
From:	Greg KH <greg@...ah.com>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	Felipe Contreras <felipe.contreras@...il.com>,
	linux-main <linux-kernel@...r.kernel.org>,
	linux-arm <linux-arm-kernel@...ts.infradead.org>,
	Arnd Hannemann <arnd@...dnet.de>,
	Han Jonghun <jonghun79.han@...il.com>,
	Uwe Kleine-K?nig <u.kleine-koenig@...gutronix.de>,
	Hemant Pedanekar <hemantp@...com>
Subject: Re: [PATCH] ARM: allow, but warn, when issuing ioremap() on RAM

On Sat, Oct 09, 2010 at 01:25:47AM +0100, Russell King - ARM Linux wrote:
> On Fri, Oct 08, 2010 at 05:00:46PM -0700, Greg KH wrote:
> > But you can't expect that you make this change, and not fix up the
> > drivers, and people would be happy, right?  The rule for API changes
> > like this, or anything, is that the person making the change fixes the
> > other drivers, and that seems to be the issue here.
> 
> Let's entirely revert the change and wait for people's data to be
> corrupted then.  I don't have the time nor the motivation to work
> through crap driver code to fix up these unreliable games which are
> already illegal on platforms such as x86.
> 
> If people want their system to be unpredictable, then let's carry on
> giving them the rope to hang themselves in that manner.
> 
> > Any pointers to patches where people have fixed up the drivers?
> 
> Despite the discussion, I'm unaware of anyone really taking the issue
> seriously and producing any patches during the last six months.
> 
> So, I say sod it, let's revert the change.

Well, how about throw a big WARN() to let people know that their driver
needs to be fixed?  That will give them the chance, right?

thanks,

greg k-h
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