tree ced37b8b4e641921593af5f64ec922a520991dd2
parent 0eb885afb20317016670c1c5dd3a436c91e1e910
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1408037303 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1408049717 -0700

rcu: Replace flush_signals() with WARN_ON(signal_pending())

Currently, when RCU awakens from a wait_event_interruptible() that
might have awakened prematurely, it does a flush_signals(). This is
done on the off-chance that someone figured out how to deliver a signal
to a kthread, which is supposed to be impossible.  Given that this
is supposed to be impossible, this commit changes the flush_signals()
calls into WARN_ON(signal_pending()).

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>