spin_lock_name
#define spin_lock_init(lock) mtx_init(lock, spin_lock_name("lnxspin"), \
MTX_SYSINIT(lock, &lock, spin_lock_name("lnxspin"), MTX_DEF)
mtx_init(&(rlock)->lock, spin_lock_name("lnxspin_raw"), \
MTX_SYSINIT(name, &(name).lock, spin_lock_name("wqhead"), MTX_DEF)
mtx_init(&(wqh)->lock, spin_lock_name("wqhead"), \
mtx_init(&dwork->timer.mtx, spin_lock_name("lkpi-dwork"), NULL,