[PATCH 4.9 093/109] dma-buf/sw-sync: Fix locking around sync_timeline lists

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson commit d3862e44daa7a0c94d2f6193502a8c49379acfce upstream. The sync_pt were not adding themselves atomically to the timeline lists, corruption imminent.

[PATCH 4.9 093/109] dma-buf/sw-sync: Fix locking around sync_timeline lists

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Chris Wilson commit d3862e44daa7a0c94d2f6193502a8c49379acfce upstream. The sync_pt were not adding themselves atomically to the timeline lists, corruption imminent. Only a single list is