Re: [PATCH] Revert "drm/i915: Fix mutex->owner inspection race under DEBUG_MUTEXES"

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On Sat, Jan 17, 2015 at 05:05:47AM +0100, Daniel Vetter wrote:
> On Thu, Jan 15, 2015 at 09:13:02AM +0200, Jani Nikula wrote:
> > On Wed, 14 Jan 2015, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> > > The core fix was applied in
> > >
> > > commit a63b03e2d2477586440741677ecac45bcf28d7b1
> > > Author: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> > > Date:   Tue Jan 6 10:29:35 2015 +0000
> > >
> > >     mutex: Always clear owner field upon mutex_unlock()
> > >
> > > (note the absence of stable@ tag)
> > >
> > > so we can now revert our band-aid commit 226e5ae9e5f910 for -next.
> >
> > Daniel, this one is for dinq, not fixes.
> 
> I tried to apply it, then noticed that I don't even have the original
> patch in there yet. It's sitting in your latest -fixes pull (which means
> that patch is not really needed since the real fix in the mutex code
> landed). Imo better if we don't ship a kernel with this.

No. The core patch is not for stable, and we need a patch for stable.
Since it is lower risk (at least for us) to modify our code, that is
what I opted to do.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre
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