Avoid uninterruptible sleep during process exit

Following 3 patches address an issue we encounter in AMDGPU driver. When GPU pipe is stalling for some reason (shader code error, incorrectly programmed registers e.t.c...) uninterruptible wait in kernel puts the user process in unresponsive state which only can be remedied by system's hard

Avoid uninterruptible sleep during process exit

Following 3 patches address an issue we encounter in AMDGPU driver. When GPU pipe is stalling for some reason (shader code error, incorrectly programmed registers e.t.c...) uninterruptible wait in kernel puts the user process in unresponsive state which only can be remedied by system's hard