VTSCSI_MTX
callout_init_lk(&req->vsr_callout, VTSCSI_MTX(sc));
"vtscsi", sc, device_get_unit(dev), VTSCSI_MTX(sc), 1,
#define VTSCSI_LOCK_INIT(_sc, _name) lockinit(VTSCSI_MTX(_sc), \
#define VTSCSI_LOCK(_sc) lockmgr(VTSCSI_MTX(_sc), LK_EXCLUSIVE)
#define VTSCSI_UNLOCK(_sc) lockmgr(VTSCSI_MTX(_sc), LK_RELEASE)
#define VTSCSI_LOCK_OWNED(_sc) KKASSERT(lockowned(VTSCSI_MTX(_sc)) != 0)
#define VTSCSI_LOCK_NOTOWNED(_sc) KKASSERT(lockowned(VTSCSI_MTX(_sc)) == 0)
#define VTSCSI_LOCK_DESTROY(_sc) lockuninit(VTSCSI_MTX(_sc))