srcu: Document that srcu_funnel_gp_start() implies srcu_funnel_exp_start()

This commit updates the header comment of srcu_funnel_gp_start() to
document the fact that srcu_funnel_gp_start() does the work of
srcu_funnel_exp_start(), in some cases by invoking it directly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2018-04-25 12:03:36 -07:00
commit 17294ce6a4