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Commit facc4e15 authored by Frederic Weisbecker's avatar Frederic Weisbecker Committed by Paul E. McKenney
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rcu: Irq nesting is always 0 on rcu_enter_idle_common 



Because tasks don't nest, the ->dyntick_nesting must always be zero upon
entry to rcu_idle_enter_common().  Therefore, pass "0" rather than the
counter itself.

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent b6fc6020

kernel/rcutree.c

+2 −3
Original line number Diff line number Diff line
@@ -350,12 +350,11 @@ static int rcu_implicit_offline_qs(struct rcu_data *rdp) 
 */

static void rcu_idle_enter_common(struct rcu_dynticks *rdtp, long long oldval)

{

	trace_rcu_dyntick("Start", oldval, rdtp->dynticks_nesting);

	trace_rcu_dyntick("Start", oldval, 0);

	if (!is_idle_task(current)) {

		struct task_struct *idle = idle_task(smp_processor_id());



		trace_rcu_dyntick("Error on entry: not idle task",

				   oldval, rdtp->dynticks_nesting);

		trace_rcu_dyntick("Error on entry: not idle task", oldval, 0);

		ftrace_dump(DUMP_ALL);

		WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",

			  current->pid, current->comm,