i8253_lock needs to be a real spinlock in preempt-rt, i.e. it can
not be converted to a sleeping lock.

Convert it to raw_spinlock and fix up all users.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
Acked-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: NTakashi Iwai <tiwai@suse.de>
Cc: Jens Axboe <jens.axboe@oracle.com>
LKML-Reference: <20100217163751.030764372@linutronix.de>

Fix PIT lockup on some chipsets when using the PC-Speaker.
Signed-off-by: NZoltan Devai <zdevai@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

Added PC-speaker sound driver (snd-pcsp).
Signed-off-by: NStas Sergeev <stsp@aknet.ru>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>