diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c
index 14691cda05c38da33ad2e8b124ea6eada5223790..ce49fe3a3b5654f88256d24b8fe6fc2410ccfc0b 100644
--- a/arch/ia64/hp/common/sba_iommu.c
+++ b/arch/ia64/hp/common/sba_iommu.c
@@ -1672,15 +1672,13 @@ ioc_sac_init(struct ioc *ioc)
 	 * SAC (single address cycle) addressable, so allocate a
 	 * pseudo-device to enforce that.
 	 */
-	sac = kmalloc(sizeof(*sac), GFP_KERNEL);
+	sac = kzalloc(sizeof(*sac), GFP_KERNEL);
 	if (!sac)
 		panic(PFX "Couldn't allocate struct pci_dev");
-	memset(sac, 0, sizeof(*sac));
 
-	controller = kmalloc(sizeof(*controller), GFP_KERNEL);
+	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
 	if (!controller)
 		panic(PFX "Couldn't allocate struct pci_controller");
-	memset(controller, 0, sizeof(*controller));
 
 	controller->iommu = ioc;
 	sac->sysdata = controller;
@@ -1737,12 +1735,10 @@ ioc_init(u64 hpa, void *handle)
 	struct ioc *ioc;
 	struct ioc_iommu *info;
 
-	ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
+	ioc = kzalloc(sizeof(*ioc), GFP_KERNEL);
 	if (!ioc)
 		return NULL;
 
-	memset(ioc, 0, sizeof(*ioc));
-
 	ioc->next = ioc_list;
 	ioc_list = ioc;
 
diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c
index b62f0c4d2c7cb6909b03f8d9d3143bd7bec32a32..1f16ebb9a800f27faf1e82fee40c31c8b57aba29 100644
--- a/arch/ia64/hp/sim/simserial.c
+++ b/arch/ia64/hp/sim/simserial.c
@@ -684,12 +684,11 @@ static int get_async_struct(int line, struct async_struct **ret_info)
 		*ret_info = sstate->info;
 		return 0;
 	}
-	info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
+	info = kzalloc(sizeof(struct async_struct), GFP_KERNEL);
 	if (!info) {
 		sstate->count--;
 		return -ENOMEM;
 	}
-	memset(info, 0, sizeof(struct async_struct));
 	init_waitqueue_head(&info->open_wait);
 	init_waitqueue_head(&info->close_wait);
 	init_waitqueue_head(&info->delta_msr_wait);
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 3aaede0d6981783037b1eaec5d0a0b7e364d57ef..fa4a1a7eb67d70db16b437b7abe5b0fa3280e6a3 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -853,9 +853,8 @@ pfm_context_alloc(void)
 	 * allocate context descriptor 
 	 * must be able to free with interrupts disabled
 	 */
-	ctx = kmalloc(sizeof(pfm_context_t), GFP_KERNEL);
+	ctx = kzalloc(sizeof(pfm_context_t), GFP_KERNEL);
 	if (ctx) {
-		memset(ctx, 0, sizeof(pfm_context_t));
 		DPRINT(("alloc ctx @%p\n", ctx));
 	}
 	return ctx;
diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
index eb92cef9cd0de15190d303b0d076c77c480e2944..474d179966dc02e221ee81d8083ae566e255e804 100644
--- a/arch/ia64/pci/pci.c
+++ b/arch/ia64/pci/pci.c
@@ -125,11 +125,10 @@ alloc_pci_controller (int seg)
 {
 	struct pci_controller *controller;
 
-	controller = kmalloc(sizeof(*controller), GFP_KERNEL);
+	controller = kzalloc(sizeof(*controller), GFP_KERNEL);
 	if (!controller)
 		return NULL;
 
-	memset(controller, 0, sizeof(*controller));
 	controller->segment = seg;
 	controller->node = -1;
 	return controller;