diff --git a/disk/qcow.c b/disk/qcow.c
index 64a2550..e26c419 100644
--- a/disk/qcow.c
+++ b/disk/qcow.c
@@ -1203,7 +1203,7 @@ static int qcow_read_refcount_table(struct qcow *q)
 	if (!rft->rf_table)
 		return -1;
 
-	rft->root = RB_ROOT;
+	rft->root = (struct rb_root) RB_ROOT;
 	INIT_LIST_HEAD(&rft->lru_list);
 
 	return pread_in_full(q->fd, rft->rf_table, sizeof(u64) * rft->rf_size, header->refcount_table_offset);
@@ -1289,7 +1289,7 @@ static struct disk_image *qcow2_probe(int fd, bool readonly)
 
 	l1t = &q->table;
 
-	l1t->root = RB_ROOT;
+	l1t->root = (struct rb_root) RB_ROOT;
 	INIT_LIST_HEAD(&l1t->lru_list);
 
 	h = q->header = qcow2_read_header(fd);
@@ -1435,7 +1435,7 @@ static struct disk_image *qcow1_probe(int fd, bool readonly)
 
 	l1t = &q->table;
 
-	l1t->root = RB_ROOT;
+	l1t->root = (struct rb_root)RB_ROOT;
 	INIT_LIST_HEAD(&l1t->lru_list);
 
 	h = q->header = qcow1_read_header(fd);
diff --git a/include/kvm/mutex.h b/include/kvm/mutex.h
index a90584b..1f7d0f6 100644
--- a/include/kvm/mutex.h
+++ b/include/kvm/mutex.h
@@ -13,7 +13,7 @@
 struct mutex {
 	pthread_mutex_t mutex;
 };
-#define MUTEX_INITIALIZER (struct mutex) { .mutex = PTHREAD_MUTEX_INITIALIZER }
+#define MUTEX_INITIALIZER { .mutex = PTHREAD_MUTEX_INITIALIZER }
 
 #define DEFINE_MUTEX(mtx) struct mutex mtx = MUTEX_INITIALIZER
 
diff --git a/include/linux/rbtree.h b/include/linux/rbtree.h
index fb31765..33adf78 100644
--- a/include/linux/rbtree.h
+++ b/include/linux/rbtree.h
@@ -46,7 +46,7 @@ struct rb_root {
 
 #define rb_parent(r)   ((struct rb_node *)((r)->__rb_parent_color & ~3))
 
-#define RB_ROOT	(struct rb_root) { NULL, }
+#define RB_ROOT	{ NULL, }
 #define	rb_entry(ptr, type, member) container_of(ptr, type, member)
 
 #define RB_EMPTY_ROOT(root)  ((root)->rb_node == NULL)
diff --git a/virtio/9p.c b/virtio/9p.c
index 66dcc26..49e7c5c 100644
--- a/virtio/9p.c
+++ b/virtio/9p.c
@@ -1320,7 +1320,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-struct virtio_ops p9_dev_virtio_ops = (struct virtio_ops) {
+struct virtio_ops p9_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/balloon.c b/virtio/balloon.c
index 84c4bb0..9564aa3 100644
--- a/virtio/balloon.c
+++ b/virtio/balloon.c
@@ -239,7 +239,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-struct virtio_ops bln_dev_virtio_ops = (struct virtio_ops) {
+struct virtio_ops bln_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/blk.c b/virtio/blk.c
index edfa8e6..c485e4f 100644
--- a/virtio/blk.c
+++ b/virtio/blk.c
@@ -244,7 +244,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-static struct virtio_ops blk_dev_virtio_ops = (struct virtio_ops) {
+static struct virtio_ops blk_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/console.c b/virtio/console.c
index 384eac1..f1c0a19 100644
--- a/virtio/console.c
+++ b/virtio/console.c
@@ -197,7 +197,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-static struct virtio_ops con_dev_virtio_ops = (struct virtio_ops) {
+static struct virtio_ops con_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/net.c b/virtio/net.c
index 9784520..4a6a855 100644
--- a/virtio/net.c
+++ b/virtio/net.c
@@ -624,7 +624,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-static struct virtio_ops net_dev_virtio_ops = (struct virtio_ops) {
+static struct virtio_ops net_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/rng.c b/virtio/rng.c
index 8031368..9b9e128 100644
--- a/virtio/rng.c
+++ b/virtio/rng.c
@@ -141,7 +141,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-static struct virtio_ops rng_dev_virtio_ops = (struct virtio_ops) {
+static struct virtio_ops rng_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,
diff --git a/virtio/scsi.c b/virtio/scsi.c
index be254f3..58d2353 100644
--- a/virtio/scsi.c
+++ b/virtio/scsi.c
@@ -167,7 +167,7 @@ static int set_size_vq(struct kvm *kvm, void *dev, u32 vq, int size)
 	return size;
 }
 
-static struct virtio_ops scsi_dev_virtio_ops = (struct virtio_ops) {
+static struct virtio_ops scsi_dev_virtio_ops = {
 	.get_config		= get_config,
 	.get_host_features	= get_host_features,
 	.set_guest_features	= set_guest_features,