rcu: Remove dead code from rcu_segcblist_insert_pend_cbs()

The rcu_segcblist_insert_pend_cbs() function currently (partially)
initializes the rcu_cblist that it pulls callbacks from.  However, all
the resulting stores are dead because all callers pass in the address of
an on-stack cblist that is not used afterwards.  This commit therefore
removes this pointless initialization.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/rcu_segcblist.c b/kernel/rcu/rcu_segcblist.c
index 426a472..9a0f661 100644 (file)
--- a/kernel/rcu/rcu_segcblist.c
+++ b/kernel/rcu/rcu_segcblist.c
@@ -381,8 +381,6 @@ void rcu_segcblist_insert_pend_cbs(struct rcu_segcblist *rsclp,
                return; /* Nothing to do. */
        WRITE_ONCE(*rsclp->tails[RCU_NEXT_TAIL], rclp->head);
        WRITE_ONCE(rsclp->tails[RCU_NEXT_TAIL], rclp->tail);
-       rclp->head = NULL;
-       rclp->tail = &rclp->head;
 }
 
 /*