Commit ff015030 authored Jun 12, 2012 by Paul E. McKenney

rcu: RCU_SAVE_DYNTICK code no longer ever dead



Before RCU had unified idle, the RCU_SAVE_DYNTICK leg of the switch
statement in force_quiescent_state() was dead code for CONFIG_NO_HZ=n
kernel builds.  With unified idle, the code is never dead.  This commit
therefore removes the "if" statement designed to make gcc aware of when
the code was and was not dead.

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

parent c0cc962d

kernel/rcutree.c

+0 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1747,8 +1747,6 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
	break; /* grace period idle or initializing, ignore. */		break; /* grace period idle or initializing, ignore. */

	case RCU_SAVE_DYNTICK:		case RCU_SAVE_DYNTICK:
	if (RCU_SIGNAL_INIT != RCU_SAVE_DYNTICK)
	break; /* So gcc recognizes the dead code. */

	raw_spin_unlock(&rnp->lock); /* irqs remain disabled */		raw_spin_unlock(&rnp->lock); /* irqs remain disabled */