[PATCH -next] ashmem: Fix ashmem_shrink deadlock.

[David Rientjes]

On Wed, 1 May 2013, Robert Love wrote:

> Don't acquire ashmem_mutex in ashmem_shrink if we've somehow recursed into the
> shrinker code from within ashmem. Just bail out, avoiding a deadlock. This is
> fine, as ashmem cache pruning is advisory anyhow.
> 
> Signed-off-by: Robert Love <rlove at google.com>

Any reason not to send this to stable at vger.kernel.org if it fixes an 
observable deadlock?  (It's annotated to be applied to linux-next, but I 
don't see any differences between it and Linus's tree.)