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timers/nohz: Use lockdep to assert IRQs are disabled/enabled

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Use lockdep to check that IRQs are enabled or disabled as expected. This
way the sanity check only shows overhead when concurrency correctness
debug code is enabled.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David S . Miller <davem@davemloft.net>
Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/1509980490-4285-5-git-send-email-frederic@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker 2017-11-06 16:01:20 +01:00 committed by Ingo Molnar
parent 8e8eb73075
commit ebf3adbad0
1 changed files with 2 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

5
kernel/time/tick-sched.c
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@ -198,7 +198,7 @@ static bool check_tick_dependency(atomic_t *dep)
static bool can_stop_full_tick(int cpu, struct tick_sched *ts) static bool can_stop_full_tick(int cpu, struct tick_sched *ts)
{ {
WARN_ON_ONCE(!irqs_disabled()); lockdep_assert_irqs_disabled();
if (unlikely(!cpu_online(cpu))) if (unlikely(!cpu_online(cpu)))
return false; return false;
@ -960,8 +960,7 @@ void tick_nohz_idle_enter(void)
{ {
struct tick_sched *ts; struct tick_sched *ts;
WARN_ON_ONCE(irqs_disabled()); lockdep_assert_irqs_enabled();
/* /*
* Update the idle state in the scheduler domain hierarchy * Update the idle state in the scheduler domain hierarchy
* when tick_nohz_stop_sched_tick() is called from the idle loop. * when tick_nohz_stop_sched_tick() is called from the idle loop.