* Nicholas Mc Guire | 2014-02-10 17:28:16 [+0100]:

A lockfree approach to check_task_state

I ignore this due to was has been written in the thread "allow
preemption in check_task_state" for now.

Also I just want to state that this function is hardly used on regular
basis except for ptrace attach case which ends up beeing a power user in
the test case mentioned.

Sebastian