Commit c8aead6a authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Simplify sync_rcu_preempt_exp_init() 



This commit eliminates a boolean and associated "if" statement by
rearranging the code.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent 78043c46

kernel/rcu/tree_plugin.h

+1 −4
Original line number Diff line number Diff line
@@ -677,19 +677,16 @@ static void 
sync_rcu_preempt_exp_init(struct rcu_state *rsp, struct rcu_node *rnp)

{

	unsigned long flags;

	int must_wait = 0;



	raw_spin_lock_irqsave(&rnp->lock, flags);

	smp_mb__after_unlock_lock();

	if (!rcu_preempt_has_tasks(rnp)) {

		raw_spin_unlock_irqrestore(&rnp->lock, flags);

		rcu_report_exp_rnp(rsp, rnp, false); /* No tasks, report. */

	} else {

		rnp->exp_tasks = rnp->blkd_tasks.next;

		rcu_initiate_boost(rnp, flags);  /* releases rnp->lock */

		must_wait = 1;

	}

	if (!must_wait)

		rcu_report_exp_rnp(rsp, rnp, false); /* Don't wake self. */

}



/**