rcu: Remove obsolete comment from __call_rcu()

The __call_rcu() comment about opportunistically noting grace period
beginnings and endings is obsolete.  RCU still does such opportunistic
noting, but in __call_rcu_core() rather than __call_rcu(), and there
already is an appropriate comment in __call_rcu_core().  This commit
therefore removes the obsolete comment.

Reported-by: Michalis Kokologiannakis <mixaskok@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index d52780024f9f6bc08fd70adc81295415d26ff273..865af187498e029663f740b7a1c7740b03b9ee0b 100644 (file)
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -3131,13 +3131,6 @@ __call_rcu(struct rcu_head *head, rcu_callback_t func,
        }
        head->func = func;
        head->next = NULL;
-
-       /*
-        * Opportunistically note grace-period endings and beginnings.
-        * Note that we might see a beginning right after we see an
-        * end, but never vice versa, since this CPU has to pass through
-        * a quiescent state betweentimes.
-        */
        local_irq_save(flags);
        rdp = this_cpu_ptr(rsp->rda);