VTSCSI_MTX
callout_init_mtx(&req->vsr_callout, VTSCSI_MTX(sc), 0);
"vtscsi", sc, device_get_unit(dev), VTSCSI_MTX(sc), 1,
#define VTSCSI_LOCK_INIT(_sc, _name) mtx_init(VTSCSI_MTX(_sc), _name, \
#define VTSCSI_LOCK(_sc) mtx_lock(VTSCSI_MTX(_sc))
#define VTSCSI_UNLOCK(_sc) mtx_unlock(VTSCSI_MTX(_sc))
#define VTSCSI_LOCK_OWNED(_sc) mtx_assert(VTSCSI_MTX(_sc), MA_OWNED)
#define VTSCSI_LOCK_NOTOWNED(_sc) mtx_assert(VTSCSI_MTX(_sc), MA_NOTOWNED)
#define VTSCSI_LOCK_DESTROY(_sc) mtx_destroy(VTSCSI_MTX(_sc))