qemu/queue.h: typedef QTAILQ heads

This will be needed when we change the QTAILQ head and elem structs
to unions.  However, it is also consistent with the usage elsewhere
in QEMU for other list head structs (see for example FsMountList).

Note that most QTAILQs only need their name in order to do backwards
walks.  Those do not break with the struct->union change, and anyway
the change will also remove the need to name heads when doing backwards
walks, so those are not touched here.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

exec.c

@@ -94,7 +94,8 @@ int target_page_bits;
 bool target_page_bits_decided;
 #endif
 
-struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
+CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus);
+
 /* current CPU in the current thread. It is only valid inside
    cpu_exec() */
 __thread CPUState *current_cpu;

hw/vfio/common.c

@@ -37,7 +37,7 @@
 #include "trace.h"
 #include "qapi/error.h"
 
-struct vfio_group_head vfio_group_list =
+VFIOGroupList vfio_group_list =
     QLIST_HEAD_INITIALIZER(vfio_group_list);
 static QLIST_HEAD(, VFIOAddressSpace) vfio_address_spaces =
     QLIST_HEAD_INITIALIZER(vfio_address_spaces);

include/hw/vfio/vfio-common.h

@@ -180,7 +180,8 @@ int vfio_get_device(VFIOGroup *group, const char *name,
                     VFIODevice *vbasedev, Error **errp);
 
 extern const MemoryRegionOps vfio_region_ops;
-extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
+typedef QLIST_HEAD(VFIOGroupList, VFIOGroup) VFIOGroupList;
+extern VFIOGroupList vfio_group_list;
 
 #ifdef CONFIG_LINUX
 int vfio_get_region_info(VFIODevice *vbasedev, int index,

include/qom/cpu.h

@@ -436,8 +436,9 @@ struct CPUState {
     GArray *iommu_notifiers;
 };
 
-QTAILQ_HEAD(CPUTailQ, CPUState);
-extern struct CPUTailQ cpus;
+typedef QTAILQ_HEAD(CPUTailQ, CPUState) CPUTailQ;
+extern CPUTailQ cpus;
+
 #define first_cpu        QTAILQ_FIRST_RCU(&cpus)
 #define CPU_NEXT(cpu)    QTAILQ_NEXT_RCU(cpu, node)
 #define CPU_FOREACH(cpu) QTAILQ_FOREACH_RCU(cpu, &cpus, node)

ui/input.c

@@ -19,6 +19,9 @@ struct QemuInputHandlerState {
 };
 
 typedef struct QemuInputEventQueue QemuInputEventQueue;
+typedef QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue)
+    QemuInputEventQueueHead;
+
 struct QemuInputEventQueue {
     enum {
         QEMU_INPUT_QUEUE_DELAY = 1,
@@ -37,8 +40,7 @@ static QTAILQ_HEAD(, QemuInputHandlerState) handlers =
 static NotifierList mouse_mode_notifiers =
     NOTIFIER_LIST_INITIALIZER(mouse_mode_notifiers);
 
-static QTAILQ_HEAD(QemuInputEventQueueHead, QemuInputEventQueue) kbd_queue =
-    QTAILQ_HEAD_INITIALIZER(kbd_queue);
+static QemuInputEventQueueHead kbd_queue = QTAILQ_HEAD_INITIALIZER(kbd_queue);
 static QEMUTimer *kbd_timer;
 static uint32_t kbd_default_delay_ms = 10;
 static uint32_t queue_count;
@@ -257,7 +259,7 @@ static void qemu_input_event_trace(QemuConsole *src, InputEvent *evt)
 
 static void qemu_input_queue_process(void *opaque)
 {
-    struct QemuInputEventQueueHead *queue = opaque;
+    QemuInputEventQueueHead *queue = opaque;
     QemuInputEventQueue *item;
 
     g_assert(!QTAILQ_EMPTY(queue));
@@ -288,7 +290,7 @@ static void qemu_input_queue_process(void *opaque)
     }
 }
 
-static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue,
+static void qemu_input_queue_delay(QemuInputEventQueueHead *queue,
                                    QEMUTimer *timer, uint32_t delay_ms)
 {
     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
@@ -306,7 +308,7 @@ static void qemu_input_queue_delay(struct QemuInputEventQueueHead *queue,
     }
 }
 
-static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue,
+static void qemu_input_queue_event(QemuInputEventQueueHead *queue,
                                    QemuConsole *src, InputEvent *evt)
 {
     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);
@@ -318,7 +320,7 @@ static void qemu_input_queue_event(struct QemuInputEventQueueHead *queue,
     queue_count++;
 }
 
-static void qemu_input_queue_sync(struct QemuInputEventQueueHead *queue)
+static void qemu_input_queue_sync(QemuInputEventQueueHead *queue)
 {
     QemuInputEventQueue *item = g_new0(QemuInputEventQueue, 1);