diff --git a/sys/mips/nlm/xlp_simplebus.c b/sys/mips/nlm/xlp_simplebus.c
index 353cf61e47b1..3ffb19a681eb 100644
--- a/sys/mips/nlm/xlp_simplebus.c
+++ b/sys/mips/nlm/xlp_simplebus.c
@@ -114,32 +114,24 @@ xlp_simplebus_init_resources(void)
 	    || rman_manage_region(&irq_rman, 0, 255))
 		panic("xlp_simplebus_init_resources irq_rman");
 
-	port_rman.rm_start = 0;
-	port_rman.rm_end = ~0ul;
 	port_rman.rm_type = RMAN_ARRAY;
 	port_rman.rm_descr = "I/O ports";
 	if (rman_init(&port_rman)
 	    || rman_manage_region(&port_rman, PCIE_IO_BASE, PCIE_IO_LIMIT))
 		panic("xlp_simplebus_init_resources port_rman");
 
-	mem_rman.rm_start = 0;
-	mem_rman.rm_end = ~0ul;
 	mem_rman.rm_type = RMAN_ARRAY;
 	mem_rman.rm_descr = "I/O memory";
 	if (rman_init(&mem_rman)
 	    || rman_manage_region(&mem_rman, PCIE_MEM_BASE, PCIE_MEM_LIMIT))
 		panic("xlp_simplebus_init_resources mem_rman");
 
-	pci_ecfg_rman.rm_start = 0;
-	pci_ecfg_rman.rm_end = ~0ul;
 	pci_ecfg_rman.rm_type = RMAN_ARRAY;
 	pci_ecfg_rman.rm_descr = "PCI ECFG IO";
 	if (rman_init(&pci_ecfg_rman) || rman_manage_region(&pci_ecfg_rman,
 	    PCI_ECFG_BASE, PCI_ECFG_LIMIT))
 		panic("xlp_simplebus_init_resources pci_ecfg_rman");
 
-	gbu_rman.rm_start = 0;
-	gbu_rman.rm_end = ~0ul;
 	gbu_rman.rm_type = RMAN_ARRAY;
 	gbu_rman.rm_descr = "Flash region";
 	if (rman_init(&gbu_rman)
diff --git a/sys/mips/rmi/xlr_pci.c b/sys/mips/rmi/xlr_pci.c
index c9d0b35d5e83..194213b2e830 100644
--- a/sys/mips/rmi/xlr_pci.c
+++ b/sys/mips/rmi/xlr_pci.c
@@ -125,16 +125,12 @@ xlr_pci_init_resources(void)
 	    || rman_manage_region(&irq_rman, 0, 255))
 		panic("pci_init_resources irq_rman");
 
-	port_rman.rm_start = 0;
-	port_rman.rm_end = ~0ul;
 	port_rman.rm_type = RMAN_ARRAY;
 	port_rman.rm_descr = "I/O ports";
 	if (rman_init(&port_rman)
 	    || rman_manage_region(&port_rman, 0x10000000, 0x1fffffff))
 		panic("pci_init_resources port_rman");
 
-	mem_rman.rm_start = 0;
-	mem_rman.rm_end = ~0ul;
 	mem_rman.rm_type = RMAN_ARRAY;
 	mem_rman.rm_descr = "I/O memory";
 	if (rman_init(&mem_rman)
diff --git a/sys/powerpc/mpc85xx/lbc.c b/sys/powerpc/mpc85xx/lbc.c
index 189b3976d57f..a94a84146c44 100644
--- a/sys/powerpc/mpc85xx/lbc.c
+++ b/sys/powerpc/mpc85xx/lbc.c
@@ -511,8 +511,6 @@ lbc_attach(device_t dev)
 	rm = &sc->sc_rman;
 	rm->rm_type = RMAN_ARRAY;
 	rm->rm_descr = "Local Bus Space";
-	rm->rm_start = 0UL;
-	rm->rm_end = ~0UL;
 	error = rman_init(rm);
 	if (error)
 		goto fail;