hg: shenandoah/jdk9/hotspot: Don't use ShenandoahJNICritical_lock. It's not needed, and can cause deadlocks.

[roman at kennke.org]

Changeset: 1dd65a307d1b
Author:    rkennke
Date:      2016-01-28 15:39 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/1dd65a307d1b

Don't use ShenandoahJNICritical_lock. It's not needed, and can cause deadlocks.

! src/share/vm/gc/shenandoah/shenandoahJNICritical.cpp
! src/share/vm/runtime/mutexLocker.hpp