am a9f27fa6: Merge "Protect notification callback parameters with a mutex." into honeycomb

* commit 'a9f27fa631ab21d52c75842ccaacc1cbcd75fca0':
  Protect notification callback parameters with a mutex.
tree: 2d088df9318bd8fa1746c3d77e4d4e0186fffaa8
  1. camera/
  2. cmds/
  3. drm/
  4. include/
  5. media/
  6. services/