RFC: mutex: hung tasks on SMP platforms with asm-generic/mutex-xchg.h

[Peter Zijlstra]

On Mon, 2012-08-13 at 15:11 +0100, Will Deacon wrote:
> 
> > Will you carry this through the ARM tree or do you want me/Ingo to take
> > it?
> 
> Please can you guys take it? The move to mutex-dec can go through the ARM
> tree but it's probably best if you take the core change. 

OK, done. Thanks!