nexus_device
struct nexus_device *ndev = DEVTONX(dev);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev;
ndev = kmalloc(sizeof(struct nexus_device), M_NEXUSDEV, M_INTWAIT|M_ZERO);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev = DEVTONX(child);
struct nexus_device *ndev = DEVTONX(child);
#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))