tree 471eff9f1eefdacc887936f196c7be2e3f7af40d
parent bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9
author Peter Zijlstra <peterz@infradead.org> 1412787070 +0200
committer Steven Rostedt <rostedt@goodmis.org> 1412812261 -0400

tracing: Robustify wait loop

The pending nested sleep debugging triggered on the potential stale
TASK_INTERRUPTIBLE in this code.

While there, fix the loop such that we won't revert to a while(1)
yield() 'spin' loop if we ever get a spurious wakeup.

And fix the actual issue by properly terminating the 'wait' loop by
setting TASK_RUNNING.

Link: http://lkml.kernel.org/p/20141008165110.GA14547@worktop.programming.kicks-ass.net

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>