qemu/queue.h: simplify reverse access to QTAILQ

The new definition of QTAILQ does not require passing the headname,
remove it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

cpus-common.c

@@ -99,7 +99,7 @@ void cpu_list_remove(CPUState *cpu)
         return;
     }
 
-    assert(!(cpu_index_auto_assigned && cpu != QTAILQ_LAST(&cpus, CPUTailQ)));
+    assert(!(cpu_index_auto_assigned && cpu != QTAILQ_LAST(&cpus)));
 
     QTAILQ_REMOVE_RCU(&cpus, cpu, node);
     cpu->cpu_index = UNASSIGNED_CPU_INDEX;

dump.c

@@ -1557,7 +1557,7 @@ static void get_max_mapnr(DumpState *s)
 {
     GuestPhysBlock *last_block;
 
-    last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead);
+    last_block = QTAILQ_LAST(&s->guest_phys_blocks.head);
     s->max_mapnr = dump_paddr_to_pfn(s, last_block->target_end);
 }
 

hw/core/qdev.c

@@ -158,7 +158,7 @@ DeviceState *qdev_try_create(BusState *bus, const char *type)
     return dev;
 }
 
-static QTAILQ_HEAD(device_listeners, DeviceListener) device_listeners
+static QTAILQ_HEAD(, DeviceListener) device_listeners
     = QTAILQ_HEAD_INITIALIZER(device_listeners);
 
 enum ListenerDirection { Forward, Reverse };
@@ -177,7 +177,7 @@ enum ListenerDirection { Forward, Reverse };
             break;                                                \
         case Reverse:                                             \
             QTAILQ_FOREACH_REVERSE(_listener, &device_listeners,  \
-                                   device_listeners, link) {      \
+                                   link) {                        \
                 if (_listener->_callback) {                       \
                     _listener->_callback(_listener, ##_args);     \
                 }                                                 \

hw/scsi/scsi-bus.c

@@ -1554,7 +1554,7 @@ SCSIDevice *scsi_device_find(SCSIBus *bus, int channel, int id, int lun)
     BusChild *kid;
     SCSIDevice *target_dev = NULL;
 
-    QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, ChildrenHead, sibling) {
+    QTAILQ_FOREACH_REVERSE(kid, &bus->qbus.children, sibling) {
         DeviceState *qdev = kid->child;
         SCSIDevice *dev = SCSI_DEVICE(qdev);
 

hw/usb/combined-packet.c

@@ -64,7 +64,7 @@ void usb_combined_input_packet_complete(USBDevice *dev, USBPacket *p)
 
     status = combined->first->status;
     actual_length = combined->first->actual_length;
-    short_not_ok = QTAILQ_LAST(&combined->packets, packets_head)->short_not_ok;
+    short_not_ok = QTAILQ_LAST(&combined->packets)->short_not_ok;
 
     QTAILQ_FOREACH_SAFE(p, &combined->packets, combined_entry, next) {
         if (!done) {

hw/usb/dev-mtp.c

@@ -191,7 +191,7 @@ struct MTPState {
 #ifdef CONFIG_INOTIFY1
     /* inotify descriptor */
     int          inotifyfd;
-    QTAILQ_HEAD(events, MTPMonEntry) events;
+    QTAILQ_HEAD(, MTPMonEntry) events;
 #endif
     /* Responder is expecting a write operation */
     bool write_pending;
@@ -1989,7 +1989,7 @@ static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
     case EP_EVENT:
 #ifdef CONFIG_INOTIFY1
         if (!QTAILQ_EMPTY(&s->events)) {
-            struct MTPMonEntry *e = QTAILQ_LAST(&s->events, events);
+            struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
             uint32_t handle;
             int len = sizeof(container) + sizeof(uint32_t);
 

hw/usb/hcd-ehci.c

@@ -1823,7 +1823,7 @@ static int ehci_state_fetchqtd(EHCIQueue *q)
             break;
         case EHCI_ASYNC_INFLIGHT:
             /* Check if the guest has added new tds to the queue */
-            again = ehci_fill_queue(QTAILQ_LAST(&q->packets, pkts_head));
+            again = ehci_fill_queue(QTAILQ_LAST(&q->packets));
             /* Unfinished async handled packet, go horizontal */
             ehci_set_state(q->ehci, q->async, EST_HORIZONTALQH);
             break;

hw/usb/hcd-ehci.h

@@ -247,7 +247,7 @@ struct EHCIQueue {
     uint32_t qtdaddr;      /* address QTD read from                */
     int last_pid;          /* pid of last packet executed          */
     USBDevice *dev;
-    QTAILQ_HEAD(pkts_head, EHCIPacket) packets;
+    QTAILQ_HEAD(, EHCIPacket) packets;
 };
 
 typedef QTAILQ_HEAD(EHCIQueueHead, EHCIQueue) EHCIQueueHead;

hw/usb/hcd-uhci.c

@@ -99,7 +99,7 @@ struct UHCIQueue {
     UHCIState *uhci;
     USBEndpoint *ep;
     QTAILQ_ENTRY(UHCIQueue) next;
-    QTAILQ_HEAD(asyncs_head, UHCIAsync) asyncs;
+    QTAILQ_HEAD(, UHCIAsync) asyncs;
     int8_t    valid;
 };
 
@@ -837,7 +837,7 @@ static int uhci_handle_td(UHCIState *s, UHCIQueue *q, uint32_t qh_addr,
         }
         if (!async->done) {
             UHCI_TD last_td;
-            UHCIAsync *last = QTAILQ_LAST(&async->queue->asyncs, asyncs_head);
+            UHCIAsync *last = QTAILQ_LAST(&async->queue->asyncs);
             /*
              * While we are waiting for the current td to complete, the guest
              * may have added more tds to the queue. Note we re-read the td

include/exec/memory.h

@@ -445,7 +445,7 @@ struct AddressSpace {
 
     int ioeventfd_nb;
     struct MemoryRegionIoeventfd *ioeventfds;
-    QTAILQ_HEAD(memory_listeners_as, MemoryListener) listeners;
+    QTAILQ_HEAD(, MemoryListener) listeners;
     QTAILQ_ENTRY(AddressSpace) address_spaces_link;
 };
 

include/hw/qdev-core.h

@@ -206,7 +206,7 @@ struct BusState {
     HotplugHandler *hotplug_handler;
     int max_index;
     bool realized;
-    QTAILQ_HEAD(ChildrenHead, BusChild) children;
+    QTAILQ_HEAD(, BusChild) children;
     QLIST_ENTRY(BusState) sibling;
 };
 

include/hw/usb.h

@@ -408,7 +408,7 @@ struct USBPacket {
 
 struct USBCombinedPacket {
     USBPacket *first;
-    QTAILQ_HEAD(packets_head, USBPacket) packets;
+    QTAILQ_HEAD(, USBPacket) packets;
     QEMUIOVector iov;
 };
 

include/net/net.h

@@ -97,7 +97,7 @@ struct NetClientState {
     unsigned rxfilter_notify_enabled:1;
     int vring_enable;
     int vnet_hdr_len;
-    QTAILQ_HEAD(NetFilterHead, NetFilterState) filters;
+    QTAILQ_HEAD(, NetFilterState) filters;
 };
 
 typedef struct NICState {

include/qemu/option_int.h

@@ -47,7 +47,7 @@ struct QemuOpts {
     char *id;
     QemuOptsList *list;
     Location loc;
-    QTAILQ_HEAD(QemuOptHead, QemuOpt) head;
+    QTAILQ_HEAD(, QemuOpt) head;
     QTAILQ_ENTRY(QemuOpts) next;
 };
 

include/qemu/queue.h

@@ -432,14 +432,14 @@ union {                                                                 \
                 (var) && ((next_var) = ((var)->field.tqe_next), 1);     \
                 (var) = (next_var))
 
-#define QTAILQ_FOREACH_REVERSE(var, head, headname, field)              \
-        for ((var) = QTAILQ_LAST(head, headname);                       \
+#define QTAILQ_FOREACH_REVERSE(var, head, field)                        \
+        for ((var) = QTAILQ_LAST(head);                                 \
                 (var);                                                  \
-                (var) = QTAILQ_PREV(var, headname, field))
+                (var) = QTAILQ_PREV(var, field))
 
-#define QTAILQ_FOREACH_REVERSE_SAFE(var, head, headname, field, prev_var) \
-        for ((var) = QTAILQ_LAST(head, headname);                       \
-             (var) && ((prev_var) = QTAILQ_PREV(var, headname, field)); \
+#define QTAILQ_FOREACH_REVERSE_SAFE(var, head, field, prev_var)         \
+        for ((var) = QTAILQ_LAST(head);                                 \
+             (var) && ((prev_var) = QTAILQ_PREV(var, field));           \
              (var) = (prev_var))
 
 /*
@@ -452,9 +452,9 @@ union {                                                                 \
 
 #define QTAILQ_LINK_PREV(link)                                          \
         ((link).tql_prev->tql_prev->tql_next)
-#define QTAILQ_LAST(head, headname) \
+#define QTAILQ_LAST(head)                                               \
         ((typeof((head)->tqh_first)) QTAILQ_LINK_PREV((head)->tqh_circ))
-#define QTAILQ_PREV(elm, headname, field) \
+#define QTAILQ_PREV(elm, field)                                         \
         ((typeof((elm)->field.tqe_next)) QTAILQ_LINK_PREV((elm)->field.tqe_circ))
 
 #define field_at_offset(base, offset, type)                                    \

include/sysemu/memory_mapping.h

@@ -36,7 +36,7 @@ typedef struct GuestPhysBlock {
 /* point-in-time snapshot of guest-visible physical mappings */
 typedef struct GuestPhysBlockList {
     unsigned num;
-    QTAILQ_HEAD(GuestPhysBlockHead, GuestPhysBlock) head;
+    QTAILQ_HEAD(, GuestPhysBlock) head;
 } GuestPhysBlockList;
 
 /* The physical and virtual address in the memory mapping are contiguous. */

memory.c

@@ -39,7 +39,7 @@ static bool memory_region_update_pending;
 static bool ioeventfd_update_pending;
 static bool global_dirty_log = false;
 
-static QTAILQ_HEAD(memory_listeners, MemoryListener) memory_listeners
+static QTAILQ_HEAD(, MemoryListener) memory_listeners
     = QTAILQ_HEAD_INITIALIZER(memory_listeners);
 
 static QTAILQ_HEAD(, AddressSpace) address_spaces
@@ -113,8 +113,7 @@ enum ListenerDirection { Forward, Reverse };
             }                                                           \
             break;                                                      \
         case Reverse:                                                   \
-            QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners,        \
-                                   memory_listeners, link) {            \
+            QTAILQ_FOREACH_REVERSE(_listener, &memory_listeners, link) { \
                 if (_listener->_callback) {                             \
                     _listener->_callback(_listener, ##_args);           \
                 }                                                       \
@@ -128,19 +127,17 @@ enum ListenerDirection { Forward, Reverse };
 #define MEMORY_LISTENER_CALL(_as, _callback, _direction, _section, _args...) \
     do {                                                                \
         MemoryListener *_listener;                                      \
-        struct memory_listeners_as *list = &(_as)->listeners;           \
                                                                         \
         switch (_direction) {                                           \
         case Forward:                                                   \
-            QTAILQ_FOREACH(_listener, list, link_as) {                  \
+            QTAILQ_FOREACH(_listener, &(_as)->listeners, link_as) {     \
                 if (_listener->_callback) {                             \
                     _listener->_callback(_listener, _section, ##_args); \
                 }                                                       \
             }                                                           \
             break;                                                      \
         case Reverse:                                                   \
-            QTAILQ_FOREACH_REVERSE(_listener, list, memory_listeners_as, \
-                                   link_as) {                           \
+            QTAILQ_FOREACH_REVERSE(_listener, &(_as)->listeners, link_as) { \
                 if (_listener->_callback) {                             \
                     _listener->_callback(_listener, _section, ##_args); \
                 }                                                       \
@@ -2691,8 +2688,7 @@ void memory_listener_register(MemoryListener *listener, AddressSpace *as)
 
     listener->address_space = as;
     if (QTAILQ_EMPTY(&memory_listeners)
-        || listener->priority >= QTAILQ_LAST(&memory_listeners,
-                                             memory_listeners)->priority) {
+        || listener->priority >= QTAILQ_LAST(&memory_listeners)->priority) {
         QTAILQ_INSERT_TAIL(&memory_listeners, listener, link);
     } else {
         QTAILQ_FOREACH(other, &memory_listeners, link) {
@@ -2704,8 +2700,7 @@ void memory_listener_register(MemoryListener *listener, AddressSpace *as)
     }
 
     if (QTAILQ_EMPTY(&as->listeners)
-        || listener->priority >= QTAILQ_LAST(&as->listeners,
-                                             memory_listeners)->priority) {
+        || listener->priority >= QTAILQ_LAST(&as->listeners)->priority) {
         QTAILQ_INSERT_TAIL(&as->listeners, listener, link_as);
     } else {
         QTAILQ_FOREACH(other, &as->listeners, link_as) {

memory_mapping.c

@@ -223,7 +223,7 @@ static void guest_phys_blocks_region_add(MemoryListener *listener,
     if (!QTAILQ_EMPTY(&g->list->head)) {
         hwaddr predecessor_size;
 
-        predecessor = QTAILQ_LAST(&g->list->head, GuestPhysBlockHead);
+        predecessor = QTAILQ_LAST(&g->list->head);
         predecessor_size = predecessor->target_end - predecessor->target_start;
 
         /* the memory API guarantees monotonically increasing traversal */

net/filter.c

@@ -55,7 +55,7 @@ static NetFilterState *netfilter_next(NetFilterState *nf,
         next = QTAILQ_NEXT(nf, next);
     } else {
         /* reverse order */
-        next = QTAILQ_PREV(nf, NetFilterHead, next);
+        next = QTAILQ_PREV(nf, next);
     }
 
     return next;

net/net.c

@@ -563,7 +563,7 @@ static ssize_t filter_receive_iov(NetClientState *nc,
             }
         }
     } else {
-        QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) {
+        QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) {
             ret = qemu_netfilter_receive(nf, direction, sender, flags, iov,
                                          iovcnt, sent_cb);
             if (ret) {

qga/commands-posix.c

@@ -1291,7 +1291,7 @@ int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
     /* cannot risk guest agent blocking itself on a write in this state */
     ga_set_frozen(ga_state);
 
-    QTAILQ_FOREACH_REVERSE(mount, &mounts, FsMountList, next) {
+    QTAILQ_FOREACH_REVERSE(mount, &mounts, next) {
         /* To issue fsfreeze in the reverse order of mounts, check if the
          * mount is listed in the list here */
         if (has_mountpoints) {

tcg/tcg.c

@@ -2319,7 +2319,7 @@ static void reachable_code_pass(TCGContext *s)
                  * wait until the dead code in between them was removed.
                  */
                 if (label->refs == 1) {
-                    TCGOp *op_prev = QTAILQ_PREV(op, TCGOpHead, link);
+                    TCGOp *op_prev = QTAILQ_PREV(op, link);
                     if (op_prev->opc == INDEX_op_br &&
                         label == arg_label(op_prev->args[0])) {
                         tcg_op_remove(s, op_prev);
@@ -2481,7 +2481,7 @@ static void liveness_pass_1(TCGContext *s)
     /* ??? Should be redundant with the exit_tb that ends the TB.  */
     la_func_end(s, nb_globals, nb_temps);
 
-    QTAILQ_FOREACH_REVERSE_SAFE(op, &s->ops, TCGOpHead, link, op_prev) {
+    QTAILQ_FOREACH_REVERSE_SAFE(op, &s->ops, link, op_prev) {
         int nb_iargs, nb_oargs;
         TCGOpcode opc_new, opc_new2;
         bool have_opc_new2;

tcg/tcg.h

@@ -719,7 +719,7 @@ struct TCGContext {
     TCGTempSet free_temps[TCG_TYPE_COUNT * 2];
     TCGTemp temps[TCG_MAX_TEMPS]; /* globals first, temps after */
 
-    QTAILQ_HEAD(TCGOpHead, TCGOp) ops, free_ops;
+    QTAILQ_HEAD(, TCGOp) ops, free_ops;
 
     /* Tells which temporary holds a given register.
        It does not take into account fixed registers */
@@ -847,7 +847,7 @@ static inline void tcg_set_insn_start_param(TCGOp *op, int arg, target_ulong v)
 /* The last op that was emitted.  */
 static inline TCGOp *tcg_last_op(void)
 {
-    return QTAILQ_LAST(&tcg_ctx->ops, TCGOpHead);
+    return QTAILQ_LAST(&tcg_ctx->ops);
 }
 
 /* Test for whether to terminate the TB for using too many opcodes.  */

tests/libqos/malloc.c

@@ -104,7 +104,7 @@ static void mlist_coalesce(MemList *head, MemBlock *node)
 
     do {
         merge = 0;
-        left = QTAILQ_PREV(node, MemList, MLIST_ENTNAME);
+        left = QTAILQ_PREV(node, MLIST_ENTNAME);
         right = QTAILQ_NEXT(node, MLIST_ENTNAME);
 
         /* clowns to the left of me */

tests/test-vmstate.c

@@ -630,7 +630,7 @@ struct TestQtailqElement {
 
 typedef struct TestQtailq {
     int16_t  i16;
-    QTAILQ_HEAD(TestQtailqHead, TestQtailqElement) q;
+    QTAILQ_HEAD(, TestQtailqElement) q;
     int32_t  i32;
 } TestQtailq;
 
@@ -735,9 +735,9 @@ static void test_load_q(void)
     g_assert_cmpint(eof, ==, QEMU_VM_EOF);
 
     TestQtailqElement *qele_from = QTAILQ_FIRST(&obj_q.q);
-    TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q, TestQtailqHead);
+    TestQtailqElement *qlast_from = QTAILQ_LAST(&obj_q.q);
     TestQtailqElement *qele_to = QTAILQ_FIRST(&tgt.q);
-    TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q, TestQtailqHead);
+    TestQtailqElement *qlast_to = QTAILQ_LAST(&tgt.q);
 
     while (1) {
         g_assert_cmpint(qele_to->b, ==, qele_from->b);
@@ -755,7 +755,7 @@ static void test_load_q(void)
     /* clean up */
     TestQtailqElement *qele;
     while (!QTAILQ_EMPTY(&tgt.q)) {
-        qele = QTAILQ_LAST(&tgt.q, TestQtailqHead);
+        qele = QTAILQ_LAST(&tgt.q);
         QTAILQ_REMOVE(&tgt.q, qele, next);
         free(qele);
         qele = NULL;

ui/console.c

@@ -182,7 +182,7 @@ struct DisplayState {
 
 static DisplayState *display_state;
 static QemuConsole *active_console;
-static QTAILQ_HEAD(consoles_head, QemuConsole) consoles =
+static QTAILQ_HEAD(, QemuConsole) consoles =
     QTAILQ_HEAD_INITIALIZER(consoles);
 static bool cursor_visible_phase;
 static QEMUTimer *cursor_timer;
@@ -1303,7 +1303,7 @@ static QemuConsole *new_console(DisplayState *ds, console_type_t console_type,
         s->index = 0;
         QTAILQ_INSERT_TAIL(&consoles, s, next);
     } else if (console_type != GRAPHIC_CONSOLE || qdev_hotplug) {
-        QemuConsole *last = QTAILQ_LAST(&consoles, consoles_head);
+        QemuConsole *last = QTAILQ_LAST(&consoles);
         s->index = last->index + 1;
         QTAILQ_INSERT_TAIL(&consoles, s, next);
     } else {

util/qemu-option.c

@@ -280,7 +280,7 @@ QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name)
 {
     QemuOpt *opt;
 
-    QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
+    QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
         if (strcmp(opt->name, name) != 0)
             continue;
         return opt;
@@ -379,7 +379,7 @@ bool qemu_opt_has_help_opt(QemuOpts *opts)
 {
     QemuOpt *opt;
 
-    QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) {
+    QTAILQ_FOREACH_REVERSE(opt, &opts->head, next) {
         if (is_help_option(opt->name)) {
             return true;
         }