diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index cbd5893..c7e6387 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -143,10 +143,9 @@
 	device = (adr >> 16) & 0xffff;
 	function = adr & 0xffff;
 
-	newfunc = kmalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
+	newfunc = kzalloc(sizeof(struct acpiphp_func), GFP_KERNEL);
 	if (!newfunc)
 		return AE_NO_MEMORY;
-	memset(newfunc, 0, sizeof(struct acpiphp_func));
 
 	INIT_LIST_HEAD(&newfunc->sibling);
 	newfunc->handle = handle;
@@ -189,13 +188,12 @@
 		}
 
 	if (!slot) {
-		slot = kmalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
+		slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
 		if (!slot) {
 			kfree(newfunc);
 			return AE_NO_MEMORY;
 		}
 
-		memset(slot, 0, sizeof(struct acpiphp_slot));
 		slot->bridge = bridge;
 		slot->device = device;
 		slot->sun = sun;
@@ -376,12 +374,10 @@
 {
 	struct acpiphp_bridge *bridge;
 
-	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
+	bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
 	if (bridge == NULL)
 		return;
 
-	memset(bridge, 0, sizeof(struct acpiphp_bridge));
-
 	bridge->type = BRIDGE_TYPE_HOST;
 	bridge->handle = handle;
 
@@ -398,14 +394,12 @@
 {
 	struct acpiphp_bridge *bridge;
 
-	bridge = kmalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
+	bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
 	if (bridge == NULL) {
 		err("out of memory\n");
 		return;
 	}
 
-	memset(bridge, 0, sizeof(struct acpiphp_bridge));
-
 	bridge->type = BRIDGE_TYPE_P2P;
 	bridge->handle = handle;
 
diff --git a/drivers/pci/hotplug/cpci_hotplug_core.c b/drivers/pci/hotplug/cpci_hotplug_core.c
index 30af105..037ce4c 100644
--- a/drivers/pci/hotplug/cpci_hotplug_core.c
+++ b/drivers/pci/hotplug/cpci_hotplug_core.c
@@ -248,22 +248,19 @@
 	 * with the pci_hotplug subsystem.
 	 */
 	for (i = first; i <= last; ++i) {
-		slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
+		slot = kzalloc(sizeof (struct slot), GFP_KERNEL);
 		if (!slot)
 			goto error;
-		memset(slot, 0, sizeof (struct slot));
 
 		hotplug_slot =
-		    kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
+			kzalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
 		if (!hotplug_slot)
 			goto error_slot;
-		memset(hotplug_slot, 0, sizeof (struct hotplug_slot));
 		slot->hotplug_slot = hotplug_slot;
 
-		info = kmalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL);
+		info = kzalloc(sizeof (struct hotplug_slot_info), GFP_KERNEL);
 		if (!info)
 			goto error_hpslot;
-		memset(info, 0, sizeof (struct hotplug_slot_info));
 		hotplug_slot->info = info;
 
 		name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
diff --git a/drivers/pci/hotplug/cpqphp_core.c b/drivers/pci/hotplug/cpqphp_core.c
index 8626901..9bc1deb 100644
--- a/drivers/pci/hotplug/cpqphp_core.c
+++ b/drivers/pci/hotplug/cpqphp_core.c
@@ -347,26 +347,22 @@
 	slot_number = ctrl->first_slot;
 
 	while (number_of_slots) {
-		slot = kmalloc(sizeof(*slot), GFP_KERNEL);
+		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 		if (!slot)
 			goto error;
 
-		memset(slot, 0, sizeof(struct slot));
-		slot->hotplug_slot = kmalloc(sizeof(*(slot->hotplug_slot)),
+		slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
 						GFP_KERNEL);
 		if (!slot->hotplug_slot)
 			goto error_slot;
 		hotplug_slot = slot->hotplug_slot;
-		memset(hotplug_slot, 0, sizeof(struct hotplug_slot));
 
 		hotplug_slot->info =
-				kmalloc(sizeof(*(hotplug_slot->info)),
+				kzalloc(sizeof(*(hotplug_slot->info)),
 							GFP_KERNEL);
 		if (!hotplug_slot->info)
 			goto error_hpslot;
 		hotplug_slot_info = hotplug_slot->info;
-		memset(hotplug_slot_info, 0,
-				sizeof(struct hotplug_slot_info));
 		hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
 
 		if (!hotplug_slot->name)
@@ -854,13 +850,12 @@
 			goto err_disable_device;
 		}
 
-		ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL);
+		ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
 		if (!ctrl) {
 			err("%s : out of memory\n", __FUNCTION__);
 			rc = -ENOMEM;
 			goto err_disable_device;
 		}
-		memset(ctrl, 0, sizeof(struct controller));
 
 		rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
 		if (rc) {
diff --git a/drivers/pci/hotplug/fakephp.c b/drivers/pci/hotplug/fakephp.c
index 060d747..71b80c2 100644
--- a/drivers/pci/hotplug/fakephp.c
+++ b/drivers/pci/hotplug/fakephp.c
@@ -95,15 +95,13 @@
 	struct hotplug_slot *slot;
 	int retval = -ENOMEM;
 
-	slot = kmalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
+	slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 	if (!slot)
 		goto error;
-	memset(slot, 0, sizeof(*slot));
 
-	slot->info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
+	slot->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 	if (!slot->info)
 		goto error_slot;
-	memset(slot->info, 0, sizeof(struct hotplug_slot_info));
 
 	slot->info->power_status = 1;
 	slot->info->max_bus_speed = PCI_SPEED_UNKNOWN;
@@ -227,11 +225,10 @@
 {
 	unsigned int devfn;
 	struct pci_dev *dev;
-	dev = kmalloc(sizeof(struct pci_dev), GFP_KERNEL);
+	dev = kzalloc(sizeof(struct pci_dev), GFP_KERNEL);
 	if (!dev)
 		return;
 
-	memset(dev, 0, sizeof(dev));
 	dev->bus = (struct pci_bus*)bus;
 	dev->sysdata = bus->sysdata;
 	for (devfn = 0; devfn < 0x100; devfn += 8) {
diff --git a/drivers/pci/hotplug/ibmphp_core.c b/drivers/pci/hotplug/ibmphp_core.c
index dc59da6..45e2a0d 100644
--- a/drivers/pci/hotplug/ibmphp_core.c
+++ b/drivers/pci/hotplug/ibmphp_core.c
@@ -1141,7 +1141,7 @@
 		goto error_power;
 	}
 
-	slot_cur->func = kmalloc(sizeof(struct pci_func), GFP_KERNEL);
+	slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
 	if (!slot_cur->func) {
 		/* We cannot do update_slot_info here, since no memory for
 		 * kmalloc n.e.ways, and update_slot_info allocates some */
@@ -1149,7 +1149,6 @@
 		rc = -ENOMEM;
 		goto error_power;
 	}
-	memset(slot_cur->func, 0, sizeof(struct pci_func));
 	slot_cur->func->busno = slot_cur->bus;
 	slot_cur->func->device = slot_cur->device;
 	for (i = 0; i < 4; i++)
@@ -1252,13 +1251,12 @@
 
 	if (slot_cur->func == NULL) {
 		/* We need this for fncs's that were there on bootup */
-		slot_cur->func = kmalloc(sizeof(struct pci_func), GFP_KERNEL);
+		slot_cur->func = kzalloc(sizeof(struct pci_func), GFP_KERNEL);
 		if (!slot_cur->func) {
 			err("out of system memory\n");
 			rc = -ENOMEM;
 			goto error;
 		}
-		memset(slot_cur->func, 0, sizeof(struct pci_func));
 		slot_cur->func->busno = slot_cur->bus;
 		slot_cur->func->device = slot_cur->device;
 	}
diff --git a/drivers/pci/hotplug/ibmphp_ebda.c b/drivers/pci/hotplug/ibmphp_ebda.c
index aea1187..ba12034 100644
--- a/drivers/pci/hotplug/ibmphp_ebda.c
+++ b/drivers/pci/hotplug/ibmphp_ebda.c
@@ -72,13 +72,7 @@
 
 static struct ebda_hpc_list * __init alloc_ebda_hpc_list (void)
 {
-	struct ebda_hpc_list *list;
-
-	list = kmalloc (sizeof (struct ebda_hpc_list), GFP_KERNEL);
-	if (!list)
-		return NULL;
-	memset (list, 0, sizeof (*list));
-	return list;
+	return kzalloc(sizeof(struct ebda_hpc_list), GFP_KERNEL);
 }
 
 static struct controller *alloc_ebda_hpc (u32 slot_count, u32 bus_count)
@@ -87,21 +81,18 @@
 	struct ebda_hpc_slot *slots;
 	struct ebda_hpc_bus *buses;
 
-	controller = kmalloc (sizeof (struct controller), GFP_KERNEL);
+	controller = kzalloc(sizeof(struct controller), GFP_KERNEL);
 	if (!controller)
 		goto error;
-	memset (controller, 0, sizeof (*controller));
 
-	slots = kmalloc (sizeof (struct ebda_hpc_slot) * slot_count, GFP_KERNEL);
+	slots = kcalloc(slot_count, sizeof(struct ebda_hpc_slot), GFP_KERNEL);
 	if (!slots)
 		goto error_contr;
-	memset (slots, 0, sizeof (*slots) * slot_count);
 	controller->slots = slots;
 
-	buses = kmalloc (sizeof (struct ebda_hpc_bus) * bus_count, GFP_KERNEL);
+	buses = kcalloc(bus_count, sizeof(struct ebda_hpc_bus), GFP_KERNEL);
 	if (!buses)
 		goto error_slots;
-	memset (buses, 0, sizeof (*buses) * bus_count);
 	controller->buses = buses;
 
 	return controller;
@@ -122,24 +113,12 @@
 
 static struct ebda_rsrc_list * __init alloc_ebda_rsrc_list (void)
 {
-	struct ebda_rsrc_list *list;
-
-	list = kmalloc (sizeof (struct ebda_rsrc_list), GFP_KERNEL);
-	if (!list)
-		return NULL;
-	memset (list, 0, sizeof (*list));
-	return list;
+	return kzalloc(sizeof(struct ebda_rsrc_list), GFP_KERNEL);
 }
 
 static struct ebda_pci_rsrc *alloc_ebda_pci_rsrc (void)
 {
-	struct ebda_pci_rsrc *resource;
-
-	resource = kmalloc (sizeof (struct ebda_pci_rsrc), GFP_KERNEL);
-	if (!resource)
-		return NULL;
-	memset (resource, 0, sizeof (*resource));
-	return resource;
+	return kzalloc(sizeof(struct ebda_pci_rsrc), GFP_KERNEL);
 }
 
 static void __init print_bus_info (void)
@@ -390,10 +369,9 @@
 			debug ("now enter io table ---\n");
 			debug ("rio blk id: %x\n", blk_id);
 
-			rio_table_ptr = kmalloc (sizeof (struct rio_table_hdr), GFP_KERNEL);
+			rio_table_ptr = kzalloc(sizeof(struct rio_table_hdr), GFP_KERNEL);
 			if (!rio_table_ptr)
 				return -ENOMEM; 
-			memset (rio_table_ptr, 0, sizeof (struct rio_table_hdr) );
 			rio_table_ptr->ver_num = readb (io_mem + offset);
 			rio_table_ptr->scal_count = readb (io_mem + offset + 1);
 			rio_table_ptr->riodev_count = readb (io_mem + offset + 2);
@@ -445,10 +423,9 @@
 
 	// we do concern about rio details
 	for (i = 0; i < rio_table_ptr->riodev_count; i++) {
-		rio_detail_ptr = kmalloc (sizeof (struct rio_detail), GFP_KERNEL);
+		rio_detail_ptr = kzalloc(sizeof(struct rio_detail), GFP_KERNEL);
 		if (!rio_detail_ptr)
 			return -ENOMEM;
-		memset (rio_detail_ptr, 0, sizeof (struct rio_detail));
 		rio_detail_ptr->rio_node_id = readb (io_mem + offset);
 		rio_detail_ptr->bbar = readl (io_mem + offset + 1);
 		rio_detail_ptr->rio_type = readb (io_mem + offset + 5);
@@ -503,10 +480,9 @@
 		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
 		opt_rio_ptr = search_opt_vg (rio_detail_ptr->chassis_num);
 		if (!opt_rio_ptr) {
-			opt_rio_ptr = (struct opt_rio *) kmalloc (sizeof (struct opt_rio), GFP_KERNEL);
+			opt_rio_ptr = kzalloc(sizeof(struct opt_rio), GFP_KERNEL);
 			if (!opt_rio_ptr)
 				return -ENOMEM;
-			memset (opt_rio_ptr, 0, sizeof (struct opt_rio));
 			opt_rio_ptr->rio_type = rio_detail_ptr->rio_type;
 			opt_rio_ptr->chassis_num = rio_detail_ptr->chassis_num;
 			opt_rio_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
@@ -546,10 +522,9 @@
 		rio_detail_ptr = list_entry (list_head_ptr, struct rio_detail, rio_detail_list);
 		opt_rio_lo_ptr = search_opt_lo (rio_detail_ptr->chassis_num);
 		if (!opt_rio_lo_ptr) {
-			opt_rio_lo_ptr = (struct opt_rio_lo *) kmalloc (sizeof (struct opt_rio_lo), GFP_KERNEL);
+			opt_rio_lo_ptr = kzalloc(sizeof(struct opt_rio_lo), GFP_KERNEL);
 			if (!opt_rio_lo_ptr)
 				return -ENOMEM;
-			memset (opt_rio_lo_ptr, 0, sizeof (struct opt_rio_lo));
 			opt_rio_lo_ptr->rio_type = rio_detail_ptr->rio_type;
 			opt_rio_lo_ptr->chassis_num = rio_detail_ptr->chassis_num;
 			opt_rio_lo_ptr->first_slot_num = rio_detail_ptr->first_slot_num;
@@ -842,12 +817,11 @@
 
 			bus_info_ptr2 = ibmphp_find_same_bus_num (slot_ptr->slot_bus_num);
 			if (!bus_info_ptr2) {
-				bus_info_ptr1 = (struct bus_info *) kmalloc (sizeof (struct bus_info), GFP_KERNEL);
+				bus_info_ptr1 = kzalloc(sizeof(struct bus_info), GFP_KERNEL);
 				if (!bus_info_ptr1) {
 					rc = -ENOMEM;
 					goto error_no_hp_slot;
 				}
-				memset (bus_info_ptr1, 0, sizeof (struct bus_info));
 				bus_info_ptr1->slot_min = slot_ptr->slot_num;
 				bus_info_ptr1->slot_max = slot_ptr->slot_num;
 				bus_info_ptr1->slot_count += 1;
@@ -946,19 +920,17 @@
 		// register slots with hpc core as well as create linked list of ibm slot
 		for (index = 0; index < hpc_ptr->slot_count; index++) {
 
-			hp_slot_ptr = kmalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
+			hp_slot_ptr = kzalloc(sizeof(*hp_slot_ptr), GFP_KERNEL);
 			if (!hp_slot_ptr) {
 				rc = -ENOMEM;
 				goto error_no_hp_slot;
 			}
-			memset(hp_slot_ptr, 0, sizeof(*hp_slot_ptr));
 
-			hp_slot_ptr->info = kmalloc (sizeof(struct hotplug_slot_info), GFP_KERNEL);
+			hp_slot_ptr->info = kzalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 			if (!hp_slot_ptr->info) {
 				rc = -ENOMEM;
 				goto error_no_hp_info;
 			}
-			memset(hp_slot_ptr->info, 0, sizeof(struct hotplug_slot_info));
 
 			hp_slot_ptr->name = kmalloc(30, GFP_KERNEL);
 			if (!hp_slot_ptr->name) {
@@ -966,12 +938,11 @@
 				goto error_no_hp_name;
 			}
 
-			tmp_slot = kmalloc(sizeof(*tmp_slot), GFP_KERNEL);
+			tmp_slot = kzalloc(sizeof(*tmp_slot), GFP_KERNEL);
 			if (!tmp_slot) {
 				rc = -ENOMEM;
 				goto error_no_slot;
 			}
-			memset(tmp_slot, 0, sizeof(*tmp_slot));
 
 			tmp_slot->flag = TRUE;
 
diff --git a/drivers/pci/hotplug/ibmphp_pci.c b/drivers/pci/hotplug/ibmphp_pci.c
index 155133f..97753dd 100644
--- a/drivers/pci/hotplug/ibmphp_pci.c
+++ b/drivers/pci/hotplug/ibmphp_pci.c
@@ -164,12 +164,11 @@
 						cleanup_count = 6;
 						goto error;
 					}
-					newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL);
+					newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
 					if (!newfunc) {
 						err ("out of system memory\n");
 						return -ENOMEM;
 					}
-					memset (newfunc, 0, sizeof (struct pci_func));
 					newfunc->busno = cur_func->busno;
 					newfunc->device = device;
 					cur_func->next = newfunc;
@@ -203,12 +202,11 @@
 					flag = FALSE;
 					for (i = 0; i < 32; i++) {
 						if (func->devices[i]) {
-							newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL);
+							newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
 							if (!newfunc) {
 								err ("out of system memory\n");
 								return -ENOMEM;
 							}
-							memset (newfunc, 0, sizeof (struct pci_func));
 							newfunc->busno = sec_number;
 							newfunc->device = (u8) i;
 							for (j = 0; j < 4; j++)
@@ -232,12 +230,11 @@
 						}
 					}
 
-					newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL);
+					newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
 					if (!newfunc) {
 						err ("out of system memory\n");
 						return -ENOMEM;
 					}
-					memset (newfunc, 0, sizeof (struct pci_func));
 					newfunc->busno = cur_func->busno;
 					newfunc->device = device;
 					for (j = 0; j < 4; j++)
@@ -279,12 +276,11 @@
 					for (i = 0; i < 32; i++) {
 						if (func->devices[i]) {
 							debug ("inside for loop, device is %x\n", i);
-							newfunc = kmalloc(sizeof(*newfunc), GFP_KERNEL);
+							newfunc = kzalloc(sizeof(*newfunc), GFP_KERNEL);
 							if (!newfunc) {
 								err (" out of system memory\n");
 								return -ENOMEM;
 							}
-							memset (newfunc, 0, sizeof (struct pci_func));
 							newfunc->busno = sec_number;
 							newfunc->device = (u8) i;
 							for (j = 0; j < 4; j++)
@@ -405,13 +401,12 @@
 
 			debug ("len[count] in IO %x, count %d\n", len[count], count);
 
-			io[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+			io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 
 			if (!io[count]) {
 				err ("out of system memory\n");
 				return -ENOMEM;
 			}
-			memset (io[count], 0, sizeof (struct resource_node));
 			io[count]->type = IO;
 			io[count]->busno = func->busno;
 			io[count]->devfunc = PCI_DEVFN(func->device, func->function);
@@ -444,12 +439,11 @@
 
 				debug ("len[count] in PFMEM %x, count %d\n", len[count], count);
 
-				pfmem[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+				pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!pfmem[count]) {
 					err ("out of system memory\n");
 					return -ENOMEM;
 				}
-				memset (pfmem[count], 0, sizeof (struct resource_node));
 				pfmem[count]->type = PFMEM;
 				pfmem[count]->busno = func->busno;
 				pfmem[count]->devfunc = PCI_DEVFN(func->device,
@@ -460,13 +454,12 @@
 					ibmphp_add_resource (pfmem[count]);
 					func->pfmem[count] = pfmem[count];
 				} else {
-					mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL);
+					mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 					if (!mem_tmp) {
 						err ("out of system memory\n");
 						kfree (pfmem[count]);
 						return -ENOMEM;
 					}
-					memset (mem_tmp, 0, sizeof (struct resource_node));
 					mem_tmp->type = MEM;
 					mem_tmp->busno = pfmem[count]->busno;
 					mem_tmp->devfunc = pfmem[count]->devfunc;
@@ -512,12 +505,11 @@
 
 				debug ("len[count] in Mem %x, count %d\n", len[count], count);
 
-				mem[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+				mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!mem[count]) {
 					err ("out of system memory\n");
 					return -ENOMEM;
 				}
-				memset (mem[count], 0, sizeof (struct resource_node));
 				mem[count]->type = MEM;
 				mem[count]->busno = func->busno;
 				mem[count]->devfunc = PCI_DEVFN(func->device,
@@ -677,14 +669,13 @@
 
 			debug ("len[count] in IO = %x\n", len[count]);
 
-			bus_io[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+			bus_io[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 		
 			if (!bus_io[count]) {
 				err ("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
-			memset (bus_io[count], 0, sizeof (struct resource_node));
 			bus_io[count]->type = IO;
 			bus_io[count]->busno = func->busno;
 			bus_io[count]->devfunc = PCI_DEVFN(func->device,
@@ -711,13 +702,12 @@
 
 				debug ("len[count] in PFMEM = %x\n", len[count]);
 
-				bus_pfmem[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+				bus_pfmem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!bus_pfmem[count]) {
 					err ("out of system memory\n");
 					retval = -ENOMEM;
 					goto error;
 				}
-				memset (bus_pfmem[count], 0, sizeof (struct resource_node));
 				bus_pfmem[count]->type = PFMEM;
 				bus_pfmem[count]->busno = func->busno;
 				bus_pfmem[count]->devfunc = PCI_DEVFN(func->device,
@@ -728,13 +718,12 @@
 					ibmphp_add_resource (bus_pfmem[count]);
 					func->pfmem[count] = bus_pfmem[count];
 				} else {
-					mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL);
+					mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 					if (!mem_tmp) {
 						err ("out of system memory\n");
 						retval = -ENOMEM;
 						goto error;
 					}
-					memset (mem_tmp, 0, sizeof (struct resource_node));
 					mem_tmp->type = MEM;
 					mem_tmp->busno = bus_pfmem[count]->busno;
 					mem_tmp->devfunc = bus_pfmem[count]->devfunc;
@@ -770,13 +759,12 @@
 
 				debug ("len[count] in Memory is %x\n", len[count]);
 
-				bus_mem[count] = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+				bus_mem[count] = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!bus_mem[count]) {
 					err ("out of system memory\n");
 					retval = -ENOMEM;
 					goto error;
 				}
-				memset (bus_mem[count], 0, sizeof (struct resource_node));
 				bus_mem[count]->type = MEM;
 				bus_mem[count]->busno = func->busno;
 				bus_mem[count]->devfunc = PCI_DEVFN(func->device,
@@ -841,14 +829,13 @@
 		flag_io = TRUE;
 	} else {
 		debug ("it wants %x IO behind the bridge\n", amount_needed->io);
-		io = kmalloc(sizeof(*io), GFP_KERNEL);
+		io = kzalloc(sizeof(*io), GFP_KERNEL);
 		
 		if (!io) {
 			err ("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
-		memset (io, 0, sizeof (struct resource_node));
 		io->type = IO;
 		io->busno = func->busno;
 		io->devfunc = PCI_DEVFN(func->device, func->function);
@@ -865,13 +852,12 @@
 		flag_mem = TRUE;
 	} else {
 		debug ("it wants %x memory behind the bridge\n", amount_needed->mem);
-		mem = kmalloc(sizeof(*mem), GFP_KERNEL);
+		mem = kzalloc(sizeof(*mem), GFP_KERNEL);
 		if (!mem) {
 			err ("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
-		memset (mem, 0, sizeof (struct resource_node));
 		mem->type = MEM;
 		mem->busno = func->busno;
 		mem->devfunc = PCI_DEVFN(func->device, func->function);
@@ -888,13 +874,12 @@
 		flag_pfmem = TRUE;
 	} else {
 		debug ("it wants %x pfmemory behind the bridge\n", amount_needed->pfmem);
-		pfmem = kmalloc(sizeof(*pfmem), GFP_KERNEL);
+		pfmem = kzalloc(sizeof(*pfmem), GFP_KERNEL);
 		if (!pfmem) {
 			err ("out of system memory\n");
 			retval = -ENOMEM;
 			goto error;
 		}
-		memset (pfmem, 0, sizeof (struct resource_node));
 		pfmem->type = PFMEM;
 		pfmem->busno = func->busno;
 		pfmem->devfunc = PCI_DEVFN(func->device, func->function);
@@ -904,13 +889,12 @@
 			ibmphp_add_resource (pfmem);
 			flag_pfmem = TRUE;
 		} else {
-			mem_tmp = kmalloc(sizeof(*mem_tmp), GFP_KERNEL);
+			mem_tmp = kzalloc(sizeof(*mem_tmp), GFP_KERNEL);
 			if (!mem_tmp) {
 				err ("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
-			memset (mem_tmp, 0, sizeof (struct resource_node));
 			mem_tmp->type = MEM;
 			mem_tmp->busno = pfmem->busno;
 			mem_tmp->devfunc = pfmem->devfunc;
@@ -936,13 +920,12 @@
 		 */
 		bus = ibmphp_find_res_bus (sec_number);
 		if (!bus) {
-			bus = kmalloc(sizeof(*bus), GFP_KERNEL);
+			bus = kzalloc(sizeof(*bus), GFP_KERNEL);
 			if (!bus) {
 				err ("out of system memory\n");
 				retval = -ENOMEM;
 				goto error;
 			}
-			memset (bus, 0, sizeof (struct bus_node));
 			bus->busno = sec_number;
 			debug ("b4 adding new bus\n");
 			rc = add_new_bus (bus, io, mem, pfmem, func->busno);
@@ -1111,10 +1094,9 @@
 	};
 	struct res_needed *amount;
 
-	amount = kmalloc(sizeof(*amount), GFP_KERNEL);
+	amount = kzalloc(sizeof(*amount), GFP_KERNEL);
 	if (amount == NULL)
 		return NULL;
-	memset (amount, 0, sizeof (struct res_needed));
 
 	ibmphp_pci_bus->number = busno;
 
@@ -1672,12 +1654,11 @@
 		list_add (&bus->bus_list, &cur_bus->bus_list);
 	}
 	if (io) {
-		io_range = kmalloc(sizeof(*io_range), GFP_KERNEL);
+		io_range = kzalloc(sizeof(*io_range), GFP_KERNEL);
 		if (!io_range) {
 			err ("out of system memory\n");
 			return -ENOMEM;
 		}
-		memset (io_range, 0, sizeof (struct range_node));
 		io_range->start = io->start;
 		io_range->end = io->end;
 		io_range->rangeno = 1;
@@ -1685,12 +1666,11 @@
 		bus->rangeIO = io_range;
 	}
 	if (mem) {
-		mem_range = kmalloc(sizeof(*mem_range), GFP_KERNEL);
+		mem_range = kzalloc(sizeof(*mem_range), GFP_KERNEL);
 		if (!mem_range) {
 			err ("out of system memory\n");
 			return -ENOMEM;
 		}
-		memset (mem_range, 0, sizeof (struct range_node));
 		mem_range->start = mem->start;
 		mem_range->end = mem->end;
 		mem_range->rangeno = 1;
@@ -1698,12 +1678,11 @@
 		bus->rangeMem = mem_range;
 	}
 	if (pfmem) {
-		pfmem_range = kmalloc(sizeof(*pfmem_range), GFP_KERNEL);
+		pfmem_range = kzalloc(sizeof(*pfmem_range), GFP_KERNEL);
 		if (!pfmem_range) {	
 			err ("out of system memory\n");
 			return -ENOMEM;
 		}
-		memset (pfmem_range, 0, sizeof (struct range_node));
 		pfmem_range->start = pfmem->start;
 		pfmem_range->end = pfmem->end;
 		pfmem_range->rangeno = 1;
diff --git a/drivers/pci/hotplug/ibmphp_res.c b/drivers/pci/hotplug/ibmphp_res.c
index 9c224c9..852a98b 100644
--- a/drivers/pci/hotplug/ibmphp_res.c
+++ b/drivers/pci/hotplug/ibmphp_res.c
@@ -55,13 +55,12 @@
 		return NULL;
 	}
 
-	newbus = kmalloc (sizeof (struct bus_node), GFP_KERNEL);
+	newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
 	if (!newbus) {
 		err ("out of system memory\n");
 		return NULL;
 	}
 
-	memset (newbus, 0, sizeof (struct bus_node));
 	if (flag)
 		newbus->busno = busno;
 	else
@@ -79,12 +78,11 @@
 		return NULL;
 	}
 
-	rs = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+	rs = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 	if (!rs) {
 		err ("out of system memory\n");
 		return NULL;
 	}
-	memset (rs, 0, sizeof (struct resource_node));
 	rs->busno = curr->bus_num;
 	rs->devfunc = curr->dev_fun;
 	rs->start = curr->start_addr;
@@ -100,12 +98,11 @@
 	u8 num_ranges = 0;
 
 	if (first_bus) {
-		newbus = kmalloc (sizeof (struct bus_node), GFP_KERNEL);
+		newbus = kzalloc(sizeof(struct bus_node), GFP_KERNEL);
 		if (!newbus) {
 			err ("out of system memory.\n");
 			return -ENOMEM;
 		}
-		memset (newbus, 0, sizeof (struct bus_node));
 		newbus->busno = curr->bus_num;
 	} else {
 		newbus = *new_bus;
@@ -122,14 +119,13 @@
 		}
 	}
 
-	newrange = kmalloc (sizeof (struct range_node), GFP_KERNEL);
+	newrange = kzalloc(sizeof(struct range_node), GFP_KERNEL);
 	if (!newrange) {
 		if (first_bus)
 			kfree (newbus);
 		err ("out of system memory\n");
 		return -ENOMEM;
 	}
-	memset (newrange, 0, sizeof (struct range_node));
 	newrange->start = curr->start_addr;
 	newrange->end = curr->end_addr;
 		
@@ -1705,12 +1701,11 @@
 
 				bus_cur->firstPFMemFromMem = pfmem_cur;
 
-				mem = kmalloc (sizeof (struct resource_node), GFP_KERNEL);		
+				mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 				if (!mem) {
 					err ("out of system memory\n");
 					return -ENOMEM;
 				}
-				memset (mem, 0, sizeof (struct resource_node));
 				mem->type = MEM;
 				mem->busno = pfmem_cur->busno;
 				mem->devfunc = pfmem_cur->devfunc;
@@ -1994,12 +1989,11 @@
 						end_address |= (upper_io_end << 16);
 
 						if ((start_address) && (start_address <= end_address)) {
-							range = kmalloc (sizeof (struct range_node), GFP_KERNEL);
+							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
 							if (!range) {
 								err ("out of system memory\n");
 								return -ENOMEM;
 							}
-							memset (range, 0, sizeof (struct range_node));
 							range->start = start_address;
 							range->end = end_address + 0xfff;
 
@@ -2020,13 +2014,12 @@
 							fix_resources (bus_sec);
 
 							if (ibmphp_find_resource (bus_cur, start_address, &io, IO)) {
-								io = kmalloc (sizeof (struct resource_node), GFP_KERNEL);							
+								io = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!io) {
 									kfree (range);
 									err ("out of system memory\n");
 									return -ENOMEM;
 								}
-								memset (io, 0, sizeof (struct resource_node));
 								io->type = IO;
 								io->busno = bus_cur->busno;
 								io->devfunc = ((device << 3) | (function & 0x7));
@@ -2045,12 +2038,11 @@
 
 						if ((start_address) && (start_address <= end_address)) {
 
-							range = kmalloc (sizeof (struct range_node), GFP_KERNEL);
+							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
 							if (!range) {
 								err ("out of system memory\n");
 								return -ENOMEM;
 							}
-							memset (range, 0, sizeof (struct range_node));
 							range->start = start_address;
 							range->end = end_address + 0xfffff;
 
@@ -2072,13 +2064,12 @@
 							fix_resources (bus_sec);
 
 							if (ibmphp_find_resource (bus_cur, start_address, &mem, MEM)) {
-								mem = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+								mem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!mem) {
 									kfree (range);
 									err ("out of system memory\n");
 									return -ENOMEM;
 								}
-								memset (mem, 0, sizeof (struct resource_node));
 								mem->type = MEM;
 								mem->busno = bus_cur->busno;
 								mem->devfunc = ((device << 3) | (function & 0x7));
@@ -2101,12 +2092,11 @@
 
 						if ((start_address) && (start_address <= end_address)) {
 
-							range = kmalloc (sizeof (struct range_node), GFP_KERNEL);
+							range = kzalloc(sizeof(struct range_node), GFP_KERNEL);
 							if (!range) {
 								err ("out of system memory\n");
 								return -ENOMEM;
 							}
-							memset (range, 0, sizeof (struct range_node));
 							range->start = start_address;
 							range->end = end_address + 0xfffff;
 
@@ -2127,13 +2117,12 @@
 
 							fix_resources (bus_sec);
 							if (ibmphp_find_resource (bus_cur, start_address, &pfmem, PFMEM)) {
-								pfmem = kmalloc (sizeof (struct resource_node), GFP_KERNEL);
+								pfmem = kzalloc(sizeof(struct resource_node), GFP_KERNEL);
 								if (!pfmem) {
 									kfree (range);
 									err ("out of system memory\n");
 									return -ENOMEM;
 								}
-								memset (pfmem, 0, sizeof (struct resource_node));
 								pfmem->type = PFMEM;
 								pfmem->busno = bus_cur->busno;
 								pfmem->devfunc = ((device << 3) | (function & 0x7));
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index 1e8506e..601cf90 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -117,27 +117,23 @@
 	slot_number = ctrl->first_slot;
 
 	while (number_of_slots) {
-		slot = kmalloc(sizeof(*slot), GFP_KERNEL);
+		slot = kzalloc(sizeof(*slot), GFP_KERNEL);
 		if (!slot)
 			goto error;
 
-		memset(slot, 0, sizeof(struct slot));
 		slot->hotplug_slot =
-				kmalloc(sizeof(*(slot->hotplug_slot)),
+				kzalloc(sizeof(*(slot->hotplug_slot)),
 						GFP_KERNEL);
 		if (!slot->hotplug_slot)
 			goto error_slot;
 		hotplug_slot = slot->hotplug_slot;
-		memset(hotplug_slot, 0, sizeof(struct hotplug_slot));
 
 		hotplug_slot->info =
-			kmalloc(sizeof(*(hotplug_slot->info)),
+			kzalloc(sizeof(*(hotplug_slot->info)),
 						GFP_KERNEL);
 		if (!hotplug_slot->info)
 			goto error_hpslot;
 		hotplug_slot_info = hotplug_slot->info;
-		memset(hotplug_slot_info, 0,
-					sizeof(struct hotplug_slot_info));
 		hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
 		if (!hotplug_slot->name)
 			goto error_info;
@@ -373,12 +369,11 @@
 	u8 value;
 	struct pci_dev *pdev;
 	
-	ctrl = kmalloc(sizeof(*ctrl), GFP_KERNEL);
+	ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL);
 	if (!ctrl) {
 		err("%s : out of memory\n", __FUNCTION__);
 		goto err_out_none;
 	}
-	memset(ctrl, 0, sizeof(struct controller));
 
 	pdev = dev->port;
 	ctrl->pci_dev = pdev;
diff --git a/drivers/pci/hotplug/rpaphp_slot.c b/drivers/pci/hotplug/rpaphp_slot.c
index 78943e0..b771196 100644
--- a/drivers/pci/hotplug/rpaphp_slot.c
+++ b/drivers/pci/hotplug/rpaphp_slot.c
@@ -84,19 +84,16 @@
 {
 	struct slot *slot;
 	
-	slot = kmalloc(sizeof (struct slot), GFP_KERNEL);
+	slot = kzalloc(sizeof(struct slot), GFP_KERNEL);
 	if (!slot)
 		goto error_nomem;
-	memset(slot, 0, sizeof (struct slot));
-	slot->hotplug_slot = kmalloc(sizeof (struct hotplug_slot), GFP_KERNEL);
+	slot->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
 	if (!slot->hotplug_slot)
 		goto error_slot;	
-	memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
-	slot->hotplug_slot->info = kmalloc(sizeof (struct hotplug_slot_info),
+	slot->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
 					   GFP_KERNEL);
 	if (!slot->hotplug_slot->info)
 		goto error_hpslot;
-	memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
 	slot->hotplug_slot->name = kmalloc(BUS_ID_SIZE + 1, GFP_KERNEL);
 	if (!slot->hotplug_slot->name)
 		goto error_info;