Commit c5b55395 authored Mar 09, 2015 by Paul E. McKenney

rcu: Remove dead code from force_qs_rnp()



Because force_qs_rnp() is invoked only from the force-quiescent-state
code which runs only in the context of the grace-period kthread, a grace
period must always be in progress throughout force_qs_rnp()'s execution.
This commit therefore removes the rcu_gp_in_progress() check and the
associated dead code.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

parent 0a0ba1c9

kernel/rcu/tree.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -2720,10 +2720,6 @@ static void force_qs_rnp(struct rcu_state *rsp,
		mask = 0;
		raw_spin_lock_irqsave(&rnp->lock, flags);
		smp_mb__after_unlock_lock();
		if (!rcu_gp_in_progress(rsp)) {
		raw_spin_unlock_irqrestore(&rnp->lock, flags);
		return;
		}
		if (rnp->qsmask == 0) {
		if (rcu_state_p == &rcu_sched_state \|\|
		rsp != rcu_state_p \|\|