wsmux_device
#define WSMUXIO_ADD_DEVICE _IOW('W', 97, struct wsmux_device)
#define WSMUXIO_REMOVE_DEVICE _IOW('W', 98, struct wsmux_device)
struct wsmux_device devices[WSMUX_MAXDEV];
struct wsmux_device wsmuxdata;
#define d ((struct wsmux_device *)data)
#define d ((struct wsmux_device *)data)
struct wsmux_device wmd;
struct wsmux_device mdev;
parsedev(const char *dev, struct wsmux_device *mdev)