diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index f7fd72ac69cf52839e6bd92a9f503fc8e7c66dad..6776c599816f33100a2403ae7286e534f0a96354 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1219,10 +1219,9 @@ acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 {
 	struct semaphore *sem = NULL;
 
-	sem = acpi_os_allocate(sizeof(struct semaphore));
+	sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
 	if (!sem)
 		return AE_NO_MEMORY;
-	memset(sem, 0, sizeof(struct semaphore));
 
 	sema_init(sem, initial_units);
 
diff --git a/drivers/acpi/utils.c b/drivers/acpi/utils.c
index 0f5f78fa6545cf4d30da8f56b426033ac7f7132e..bba526148583c4ea67e0a5d08631d7f0eecbee2a 100644
--- a/drivers/acpi/utils.c
+++ b/drivers/acpi/utils.c
@@ -164,11 +164,10 @@ acpi_extract_package(union acpi_object *package,
 	 * Validate output buffer.
 	 */
 	if (buffer->length == ACPI_ALLOCATE_BUFFER) {
-		buffer->pointer = ACPI_ALLOCATE(size_required);
+		buffer->pointer = ACPI_ALLOCATE_ZEROED(size_required);
 		if (!buffer->pointer)
 			return AE_NO_MEMORY;
 		buffer->length = size_required;
-		memset(buffer->pointer, 0, size_required);
 	} else {
 		if (buffer->length < size_required) {
 			buffer->length = size_required;