As of:

  bcc9a76d ("locking/rwsem: Reinit wake_q after use")

the comment regarding the list reinitialization no longer applies,
update it with the new wake_q_init() helper.
Signed-off-by: NDavidlohr Bueso <dbueso@suse.de>
Acked-by: NWaiman Long <longman@redhat.com>
Cc: peterz@infradead.org
Cc: longman@redhat.com
Cc: akpm@linux-foundation.org
Cc: paulmck@linux.vnet.ibm.com
Cc: torvalds@linux-foundation.org
Link: http://lkml.kernel.org/r/20170129151531.GA2444@linux-80c1.suseSigned-off-by: NIngo Molnar <mingo@kernel.org>