In PREEMPT_RT kernels, both spin_lock() and spin_lock_irq() are converted
to sleepable rt_spin_lock(). This means that the interrupt related suffix
for spin_lock/unlock(_irq, irqsave/irqrestore) do not affect the CPU's
interrupt state. This commit therefore adds raw spin-lock torture tests.
This in turn permits pure spin locks to be tested in PREEMPT_RT kernels.
Suggested-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Suggested-by: Davidlohr Bueso <dave@xxxxxxxxxxxx>
Signed-off-by: Zqiang <qiang1.zhang@xxxxxxxxx>