snd_pcm_oss_ioctl 2720 sound/core/oss/pcm_oss.c return snd_pcm_oss_ioctl(file, cmd, (unsigned long)compat_ptr(arg)); snd_pcm_oss_ioctl 3074 sound/core/oss/pcm_oss.c .unlocked_ioctl = snd_pcm_oss_ioctl,