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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: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Frederic Weisbecker 2011-11-28 16:26:56 -08:00 committed by Paul E. McKenney
parent b6fc602014
commit facc4e1596
1 changed files with 2 additions and 3 deletions
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5
kernel/rcutree.c
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@ -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) 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)) { if (!is_idle_task(current)) {
struct task_struct *idle = idle_task(smp_processor_id()); struct task_struct *idle = idle_task(smp_processor_id());
trace_rcu_dyntick("Error on entry: not idle task", trace_rcu_dyntick("Error on entry: not idle task", oldval, 0);
oldval, rdtp->dynticks_nesting);
ftrace_dump(DUMP_ALL); ftrace_dump(DUMP_ALL);
WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s", WARN_ONCE(1, "Current pid: %d comm: %s / Idle pid: %d comm: %s",
current->pid, current->comm, current->pid, current->comm,