Commit f0e7c19d authored Nov 23, 2011 by Paul E. McKenney Committed by Paul E. McKenney Dec 11, 2011

rcu: Identify dyntick-idle CPUs on first force_quiescent_state() pass

Fixes and workarounds for a number of issues (for example, that in
df4012edc) make it safe to once again detect dyntick-idle CPUs on the
first pass of force_quiescent_state(), so this commit makes that change.

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

parent c92b131b

kernel/rcutree.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -607,7 +607,7 @@ int rcu_is_cpu_rrupt_from_idle(void)
		static int dyntick_save_progress_counter(struct rcu_data *rdp)
		{
		rdp->dynticks_snap = atomic_add_return(0, &rdp->dynticks->dynticks);
		return 0;
		return (rdp->dynticks_snap & 0x1) == 0;
		}

		/*

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