Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
if (raw_spin_trylock(&rdp->nocb_bypass_lock))
return;
atomic_inc(&rdp->nocb_lock_contended);
+ WARN_ON_ONCE(smp_processor_id() != rdp->cpu);
smp_mb__after_atomic(); /* atomic_inc() before lock. */
raw_spin_lock(&rdp->nocb_bypass_lock);
smp_mb__before_atomic(); /* atomic_dec() after lock. */
*/
static void rcu_nocb_wait_contended(struct rcu_data *rdp)
{
- while (atomic_read(&rdp->nocb_lock_contended))
+ WARN_ON_ONCE(smp_processor_id() != rdp->cpu);
+ while (WARN_ON_ONCE(atomic_read(&rdp->nocb_lock_contended)))
cpu_relax();
}