snd_timer_uinfo
#define SNDRV_TIMER_IOCTL_CREATE _IOWR('T', 0xa5, struct snd_timer_uinfo)
static int snd_utimer_create(struct snd_timer_uinfo *utimer_info,
struct snd_timer_uinfo __user *_utimer_info)
struct snd_timer_uinfo *utimer_info __free(kfree) =
struct snd_timer_uinfo __user *_utimer_info)
#define SNDRV_TIMER_IOCTL_CREATE _IOWR('T', 0xa5, struct snd_timer_uinfo)
struct snd_timer_uinfo wrong_timer = {
struct snd_timer_uinfo *utimer_info;