snd_pcm_stream_lock_irqsave — Lock the PCM stream
|  snd_pcm_stream_lock_irqsave ( | substream, | 
| flags ); | 
   This locks the PCM stream like snd_pcm_stream_lock but with the local
   IRQ (only when nonatomic is false).  In nonatomic case, this is identical
   as snd_pcm_stream_lock.