Index: sys/powerpc/cpufreq/pmufreq.c
===================================================================
--- sys/powerpc/cpufreq/pmufreq.c
+++ sys/powerpc/cpufreq/pmufreq.c
@@ -108,14 +108,13 @@
 static int
 pmufreq_probe(device_t dev)
 {
-	struct pmufreq_softc *sc;
 	phandle_t node;
 	uint32_t min_freq;
 
 	if (resource_disabled("pmufreq", 0))
 		return (ENXIO);
 
-	sc = device_get_softc(dev);
+	device_get_softc(dev);
 	node = ofw_bus_get_node(device_get_parent(dev));
 	/*
 	 * A scalable MPC7455 has min-clock-frequency/max-clock-frequency as OFW
Index: sys/powerpc/pseries/mmu_phyp.c
===================================================================
--- sys/powerpc/pseries/mmu_phyp.c
+++ sys/powerpc/pseries/mmu_phyp.c
@@ -113,7 +113,7 @@
 	char buf[8];
 	uint32_t prop[2];
 	uint32_t nptlp, shift = 0, slb_encoding = 0;
-	uint32_t lp_size, lp_encoding;
+	uint32_t lp_size = 0, lp_encoding = 0;
 	struct lpte old;
 	uint64_t vsid;
 	phandle_t dev, node, root;
Index: sys/powerpc/pseries/phyp_llan.c
===================================================================
--- sys/powerpc/pseries/phyp_llan.c
+++ sys/powerpc/pseries/phyp_llan.c
@@ -156,7 +156,7 @@
 {
 	struct llan_softc *sc;
 	phandle_t node;
-	int error, i;
+	int i;
 
 	sc = device_get_softc(dev);
 	sc->dev = dev;
@@ -184,22 +184,22 @@
 	    INTR_ENTROPY, NULL, llan_intr, sc, &sc->irq_cookie);
 
 	/* Setup DMA */
-	error = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
+	bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
             BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
 	    LLAN_RX_BUF_LEN, 1, BUS_SPACE_MAXSIZE_32BIT,
 	    0, NULL, NULL, &sc->rx_dma_tag);
-	error = bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
+	bus_dma_tag_create(bus_get_dma_tag(dev), 4, 0,
             BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
 	    BUS_SPACE_MAXSIZE, 1, BUS_SPACE_MAXSIZE_32BIT,
 	    0, NULL, NULL, &sc->rxbuf_dma_tag);
-	error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
+	bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
             BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
 	    BUS_SPACE_MAXSIZE, 6, BUS_SPACE_MAXSIZE_32BIT, 0,
 	    busdma_lock_mutex, &sc->io_lock, &sc->tx_dma_tag);
 
-	error = bus_dmamem_alloc(sc->rx_dma_tag, (void **)&sc->rx_buf,
+	bus_dmamem_alloc(sc->rx_dma_tag, (void **)&sc->rx_buf,
 	    BUS_DMA_WAITOK | BUS_DMA_ZERO, &sc->rx_buf_map);
-	error = bus_dmamap_load(sc->rx_dma_tag, sc->rx_buf_map, sc->rx_buf,
+	bus_dmamap_load(sc->rx_dma_tag, sc->rx_buf_map, sc->rx_buf,
 	    LLAN_RX_BUF_LEN, llan_rx_load_cb, sc, 0);
 
 	/* TX DMA maps */
@@ -207,7 +207,7 @@
 
 	/* RX DMA */
 	for (i = 0; i < LLAN_MAX_RX_PACKETS; i++) {
-		error = bus_dmamap_create(sc->rxbuf_dma_tag, 0,
+		bus_dmamap_create(sc->rxbuf_dma_tag, 0,
 		    &sc->rx_xfer[i].rx_dmamap);
 		sc->rx_xfer[i].rx_mbuf = NULL;
 	}
@@ -282,7 +282,7 @@
 	struct llan_softc *sc = xsc;
 	uint64_t rx_buf_desc;
 	uint64_t macaddr;
-	int err, i;
+	int i;
 
 	mtx_lock(&sc->io_lock);
 
@@ -296,7 +296,7 @@
 	rx_buf_desc |= (sc->rx_buf_len << 32);
 	rx_buf_desc |= sc->rx_buf_phys;
 	memcpy(&macaddr, sc->mac_address, 8);
-	err = phyp_hcall(H_REGISTER_LOGICAL_LAN, sc->unit, sc->input_buf_phys,
+	phyp_hcall(H_REGISTER_LOGICAL_LAN, sc->unit, sc->input_buf_phys,
 	    rx_buf_desc, sc->filter_buf_phys, macaddr);
 
 	for (i = 0; i < LLAN_MAX_RX_PACKETS; i++)
@@ -451,12 +451,10 @@
 llan_start_locked(struct ifnet *ifp)
 {
 	struct llan_softc *sc = ifp->if_softc;
-	bus_addr_t first;
 	int nsegs;
 	struct mbuf *mb_head, *m;
 
 	mtx_assert(&sc->io_lock, MA_OWNED);
-	first = 0;
 
 	if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
 	    IFF_DRV_RUNNING)