linux-kernel - Re: [PATCH v2] ARM: uaccess: Implement strict user copy checks

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Message-ID: <20100825144040.GI2153@osiris.boeblingen.de.ibm.com>
Date:	Wed, 25 Aug 2010 16:40:40 +0200
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Stephen Boyd <sboyd@...eaurora.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH v2] ARM: uaccess: Implement strict user copy checks

On Wed, Aug 25, 2010 at 03:55:53PM +0200, Arnd Bergmann wrote:
> On Wednesday 25 August 2010, Heiko Carstens wrote:
> > > I think it would be easier to remove the config option entirely on s390
> > > and just always warn. As I said earlier in this thread, I generally
> > > don't think this particular warning is more important than a lot of
> > > the other ones that we don't turn into errors.
> > 
> > I disagree: a default kernel build should compile without the noise of
> > tens of false positive warnings.
> > Nobody would look at new warnings and fix possible bugs.
> > That's why I want to have an option to turn the warnings off (default).
> > 
> > Or are you volunteering to "fix" all the false positives? :)
> 
> If you don't want to see the warnings, then just remove the strict checks.
> We already concluded that there is little value in them on s390 since it only
> shows false postives.
> 
> Maybe the easiest way would be to rename the option on s390 and move all
> the other ones into a common place.

Yes, feel free to do that.
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