__snd_usb_lock
static inline struct __snd_usb_lock __snd_usb_lock_shutdown(struct snd_usb_audio *chip)
struct __snd_usb_lock T = { .chip = chip };
static inline void __snd_usb_unlock_shutdown(struct __snd_usb_lock *lock)
DEFINE_CLASS(snd_usb_lock, struct __snd_usb_lock,