From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kyle McMartin Subject: Re: Request for backport of [PARISC] futex: special case cmpxchg NULL in kernel space Date: Tue, 15 Apr 2008 12:09:03 -0400 Message-ID: <20080415160903.GD22873@phobos.i.cabal.ca> References: <1208274312.3131.11.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: stable@kernel.org, Parisc List To: James Bottomley Return-path: In-Reply-To: <1208274312.3131.11.camel@localhost.localdomain> List-ID: List-Id: linux-parisc.vger.kernel.org On Tue, Apr 15, 2008 at 10:45:11AM -0500, James Bottomley wrote: > This is a fix for a bug introduced by tglx into 2.6.25 which we fixed > upstream. However, he also got it backported to stable, so now 2.6.24.4 > panics on boot on parisc. The attached is the fix. > The fix is fine, but it was misdiagnosed. The problem is actually that swapper's *mm is unset. I switched it to if (!current->mm) in git, but as usual I'm a slacker and haven't pushed it anywhere. +1 for stable from me.