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ALSA: Remove unneeded snd_pcm_substream.timer_lock

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The timer callbacks are called in the protected status by the lock
of the timer instance, so there is no need for an extra lock in the
PCM substream.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2009-03-06 16:30:07 +01:00
parent ed3da3d9a0
commit 85122ea40c
3 changed files with 0 additions and 8 deletions
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1
include/sound/pcm.h
View file

@ -364,7 +364,6 @@ struct snd_pcm_substream {
/* -- timer section -- */
struct snd_timer *timer; /* timer */
unsigned timer_running: 1; /* time is running */
spinlock_t timer_lock;
/* -- next substream -- */
struct snd_pcm_substream *next;
/* -- linked substreams -- */

1
sound/core/pcm.c
View file

@ -667,7 +667,6 @@ int snd_pcm_new_stream(struct snd_pcm *pcm, int stream, int substream_count)
spin_lock_init(&substream->self_group.lock);
INIT_LIST_HEAD(&substream->self_group.substreams);
list_add_tail(&substream->link_list, &substream->self_group.substreams);
spin_lock_init(&substream->timer_lock);
atomic_set(&substream->mmap_count, 0);
prev = substream;
}

6
sound/core/pcm_timer.c
View file

@ -85,25 +85,19 @@ static unsigned long snd_pcm_timer_resolution(struct snd_timer * timer)
static int snd_pcm_timer_start(struct snd_timer * timer)
{
unsigned long flags;
struct snd_pcm_substream *substream;
substream = snd_timer_chip(timer);
spin_lock_irqsave(&substream->timer_lock, flags);
substream->timer_running = 1;
spin_unlock_irqrestore(&substream->timer_lock, flags);
return 0;
}
static int snd_pcm_timer_stop(struct snd_timer * timer)
{
unsigned long flags;
struct snd_pcm_substream *substream;
substream = snd_timer_chip(timer);
spin_lock_irqsave(&substream->timer_lock, flags);
substream->timer_running = 0;
spin_unlock_irqrestore(&substream->timer_lock, flags);
return 0;
}