snd_kctl_event
#define snd_kctl_event(n) list_entry(n, struct snd_kctl_event, list)
struct snd_kctl_event *cread;
cread = snd_kctl_event(ctl->events.next);
struct snd_kctl_event *ev;
struct snd_kctl_event *kev;
kev = snd_kctl_event(ctl->events.next);