[Qemu-devel] [PATCH v8 17/35] qapi: Drop unused 'kind' for struct/enum visit

[Eric Blake <eblake@redhat.com>]

visit_start_struct() and visit_type_enum() had a 'kind' argument
that was usually set to either the stringized version of the
corresponding qapi type name, or to NULL (although some clients
didn't even get that right).  But nothing ever used the argument.
It's even hard to argue that it would be useful in a debugger,
as a stack backtrace also tells which type is being visited.

Therefore, drop the 'kind' argument as dead.

Signed-off-by: Eric Blake <eblake@redhat.com>

---
v8: rebase to 'name' motion
v7: new patch
---
 hmp.c                       |  2 +-
 hw/core/qdev-properties.c   |  6 ++----
 hw/ppc/spapr_drc.c          |  4 ++--
 hw/virtio/virtio-balloon.c  |  4 ++--
 include/qapi/visitor-impl.h | 11 ++++-------
 include/qapi/visitor.h      |  5 ++---
 qapi/opts-visitor.c         |  2 +-
 qapi/qapi-dealloc-visitor.c |  6 ++----
 qapi/qapi-visit-core.c      | 16 +++++++---------
 qapi/qmp-input-visitor.c    |  2 +-
 qapi/qmp-output-visitor.c   |  3 +--
 qom/object.c                |  8 ++++----
 scripts/qapi-event.py       |  2 +-
 scripts/qapi-visit.py       | 12 ++++++------
 vl.c                        |  2 +-
 15 files changed, 37 insertions(+), 48 deletions(-)

diff --git a/hmp.c b/hmp.c
index 7b32f6f..159dfc4 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1680,7 +1680,7 @@ void hmp_object_add(Monitor *mon, const QDict *qdict)
     pdict = qdict_clone_shallow(qdict);
     v = opts_get_visitor(ov);

-    visit_start_struct(v, NULL, NULL, NULL, 0, &err);
+    visit_start_struct(v, NULL, NULL, 0, &err);
     if (err) {
         goto out_clean;
     }
diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index 72f019d..b00b010 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -48,8 +48,7 @@ static void get_enum(Object *obj, Visitor *v, const char *name, void *opaque,
     Property *prop = opaque;
     int *ptr = qdev_get_prop_ptr(dev, prop);

-    visit_type_enum(v, prop->name, ptr, prop->info->enum_table,
-                    prop->info->name, errp);
+    visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
 }

 static void set_enum(Object *obj, Visitor *v, const char *name, void *opaque,
@@ -64,8 +63,7 @@ static void set_enum(Object *obj, Visitor *v, const char *name, void *opaque,
         return;
     }

-    visit_type_enum(v, prop->name, ptr, prop->info->enum_table,
-                    prop->info->name, errp);
+    visit_type_enum(v, prop->name, ptr, prop->info->enum_table, errp);
 }

 /* Bit */
diff --git a/hw/ppc/spapr_drc.c b/hw/ppc/spapr_drc.c
index 9b2be17..c00e9da 100644
--- a/hw/ppc/spapr_drc.c
+++ b/hw/ppc/spapr_drc.c
@@ -259,7 +259,7 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
     void *fdt;

     if (!drc->fdt) {
-        visit_start_struct(v, name, NULL, NULL, 0, &err);
+        visit_start_struct(v, name, NULL, 0, &err);
         if (!err) {
             visit_end_struct(v, &err);
         }
@@ -282,7 +282,7 @@ static void prop_get_fdt(Object *obj, Visitor *v, const char *name,
         case FDT_BEGIN_NODE:
             fdt_depth++;
             name = fdt_get_name(fdt, fdt_offset, &name_len);
-            visit_start_struct(v, name, NULL, NULL, 0, &err);
+            visit_start_struct(v, name, NULL, 0, &err);
             if (err) {
                 error_propagate(errp, err);
                 return;
diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
index dc44088..24ecd87 100644
--- a/hw/virtio/virtio-balloon.c
+++ b/hw/virtio/virtio-balloon.c
@@ -117,7 +117,7 @@ static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
     VirtIOBalloon *s = opaque;
     int i;

-    visit_start_struct(v, name, NULL, "guest-stats", 0, &err);
+    visit_start_struct(v, name, NULL, 0, &err);
     if (err) {
         goto out;
     }
@@ -126,7 +126,7 @@ static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name,
         goto out_end;
     }

-    visit_start_struct(v, "stats", NULL, NULL, 0, &err);
+    visit_start_struct(v, "stats", NULL, 0, &err);
     if (err) {
         goto out_end;
     }
diff --git a/include/qapi/visitor-impl.h b/include/qapi/visitor-impl.h
index 8560949..ac22964 100644
--- a/include/qapi/visitor-impl.h
+++ b/include/qapi/visitor-impl.h
@@ -19,7 +19,7 @@ struct Visitor
 {
     /* Must be set */
     void (*start_struct)(Visitor *v, const char *name, void **obj,
-                         const char *kind, size_t size, Error **errp);
+                         size_t size, Error **errp);
     void (*end_struct)(Visitor *v, Error **errp);

     void (*start_implicit_struct)(Visitor *v, void **obj, size_t size,
@@ -31,8 +31,7 @@ struct Visitor
     void (*end_list)(Visitor *v, Error **errp);

     void (*type_enum)(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp);
+                      const char *const strings[], Error **errp);
     /* May be NULL; only needed for input visitors. */
     void (*get_next_type)(Visitor *v, const char *name, QType *type,
                           bool promote_int, Error **errp);
@@ -62,10 +61,8 @@ struct Visitor
 };

 void input_type_enum(Visitor *v, const char *name, int *obj,
-                     const char * const strings[], const char *kind,
-                     Error **errp);
+                     const char *const strings[], Error **errp);
 void output_type_enum(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp);
+                      const char *const strings[], Error **errp);

 #endif
diff --git a/include/qapi/visitor.h b/include/qapi/visitor.h
index eb50116..4abc180 100644
--- a/include/qapi/visitor.h
+++ b/include/qapi/visitor.h
@@ -28,7 +28,7 @@ typedef struct GenericList
 } GenericList;

 void visit_start_struct(Visitor *v, const char *name, void **obj,
-                        const char *kind, size_t size, Error **errp);
+                        size_t size, Error **errp);
 void visit_end_struct(Visitor *v, Error **errp);
 void visit_start_implicit_struct(Visitor *v, void **obj, size_t size,
                                  Error **errp);
@@ -54,8 +54,7 @@ bool visit_optional(Visitor *v, const char *name, bool *present);
 void visit_get_next_type(Visitor *v, const char *name, QType *type,
                          bool promote_int, Error **errp);
 void visit_type_enum(Visitor *v, const char *name, int *obj,
-                     const char *const strings[], const char *kind,
-                     Error **errp);
+                     const char *const strings[], Error **errp);
 void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp);
 void visit_type_uint8(Visitor *v, const char *name, uint8_t *obj,
                       Error **errp);
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index b1c8e50..6d4a91e 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -124,7 +124,7 @@ opts_visitor_insert(GHashTable *unprocessed_opts, const QemuOpt *opt)


 static void
-opts_start_struct(Visitor *v, const char *name, void **obj, const char *kind,
+opts_start_struct(Visitor *v, const char *name, void **obj,
                   size_t size, Error **errp)
 {
     OptsVisitor *ov = to_ov(v);
diff --git a/qapi/qapi-dealloc-visitor.c b/qapi/qapi-dealloc-visitor.c
index b521f7c..49e7cf0 100644
--- a/qapi/qapi-dealloc-visitor.c
+++ b/qapi/qapi-dealloc-visitor.c
@@ -59,8 +59,7 @@ static void *qapi_dealloc_pop(QapiDeallocVisitor *qov)
 }

 static void qapi_dealloc_start_struct(Visitor *v, const char *name, void **obj,
-                                      const char *kind, size_t unused,
-                                      Error **errp)
+                                      size_t unused, Error **errp)
 {
     QapiDeallocVisitor *qov = to_qov(v);
     qapi_dealloc_push(qov, obj);
@@ -164,8 +163,7 @@ static void qapi_dealloc_type_anything(Visitor *v, const char *name,
 }

 static void qapi_dealloc_type_enum(Visitor *v, const char *name, int *obj,
-                                   const char * const strings[],
-                                   const char *kind, Error **errp)
+                                   const char * const strings[], Error **errp)
 {
 }

diff --git a/qapi/qapi-visit-core.c b/qapi/qapi-visit-core.c
index 7bc3de6..b0452cf 100644
--- a/qapi/qapi-visit-core.c
+++ b/qapi/qapi-visit-core.c
@@ -2,6 +2,7 @@
  * Core Definitions for QAPI Visitor Classes
  *
  * Copyright IBM, Corp. 2011
+ * Copyright (C) 2015 Red Hat, Inc.
  *
  * Authors:
  *  Anthony Liguori   <aliguori@us.ibm.com>
@@ -18,9 +19,9 @@
 #include "qapi/visitor-impl.h"

 void visit_start_struct(Visitor *v, const char *name, void **obj,
-                        const char *kind, size_t size, Error **errp)
+                        size_t size, Error **errp)
 {
-    v->start_struct(v, name, obj, kind, size, errp);
+    v->start_struct(v, name, obj, size, errp);
 }

 void visit_end_struct(Visitor *v, Error **errp)
@@ -90,10 +91,9 @@ void visit_get_next_type(Visitor *v, const char *name, QType *type,
 }

 void visit_type_enum(Visitor *v, const char *name, int *obj,
-                     const char *const strings[], const char *kind,
-                     Error **errp)
+                     const char *const strings[], Error **errp)
 {
-    v->type_enum(v, name, obj, strings, kind, errp);
+    v->type_enum(v, name, obj, strings, errp);
 }

 void visit_type_int(Visitor *v, const char *name, int64_t *obj, Error **errp)
@@ -227,8 +227,7 @@ void visit_type_any(Visitor *v, const char *name, QObject **obj, Error **errp)
 }

 void output_type_enum(Visitor *v, const char *name, int *obj,
-                      const char * const strings[], const char *kind,
-                      Error **errp)
+                      const char * const strings[], Error **errp)
 {
     int i = 0;
     int value = *obj;
@@ -246,8 +245,7 @@ void output_type_enum(Visitor *v, const char *name, int *obj,
 }

 void input_type_enum(Visitor *v, const char *name, int *obj,
-                     const char * const strings[], const char *kind,
-                     Error **errp)
+                     const char * const strings[], Error **errp)
 {
     Error *local_err = NULL;
     int64_t value = 0;
diff --git a/qapi/qmp-input-visitor.c b/qapi/qmp-input-visitor.c
index de77740..bf25249 100644
--- a/qapi/qmp-input-visitor.c
+++ b/qapi/qmp-input-visitor.c
@@ -115,7 +115,7 @@ static void qmp_input_pop(QmpInputVisitor *qiv, Error **errp)
 }

 static void qmp_input_start_struct(Visitor *v, const char *name, void **obj,
-                                   const char *kind, size_t size, Error **errp)
+                                   size_t size, Error **errp)
 {
     QmpInputVisitor *qiv = to_qiv(v);
     QObject *qobj = qmp_input_get_object(qiv, name, true);
diff --git a/qapi/qmp-output-visitor.c b/qapi/qmp-output-visitor.c
index af600a9..db5e618 100644
--- a/qapi/qmp-output-visitor.c
+++ b/qapi/qmp-output-visitor.c
@@ -111,8 +111,7 @@ static void qmp_output_add_obj(QmpOutputVisitor *qov, const char *name,
 }

 static void qmp_output_start_struct(Visitor *v, const char *name, void **obj,
-                                    const char *kind, size_t unused,
-                                    Error **errp)
+                                    size_t unused, Error **errp)
 {
     QmpOutputVisitor *qov = to_qov(v);
     QDict *dict = qdict_new();
diff --git a/qom/object.c b/qom/object.c
index 9056c73..f0ab9aa 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -1186,7 +1186,7 @@ int object_property_get_enum(Object *obj, const char *name,
     siv = string_input_visitor_new(str);
     string_output_visitor_cleanup(sov);
     visit_type_enum(string_input_get_visitor(siv), name, &ret,
-                    enumprop->strings, NULL, errp);
+                    enumprop->strings, errp);

     g_free(str);
     string_input_visitor_cleanup(siv);
@@ -1812,7 +1812,7 @@ static void property_get_enum(Object *obj, Visitor *v, const char *name,
         return;
     }

-    visit_type_enum(v, name, &value, prop->strings, NULL, errp);
+    visit_type_enum(v, name, &value, prop->strings, errp);
 }

 static void property_set_enum(Object *obj, Visitor *v, const char *name,
@@ -1822,7 +1822,7 @@ static void property_set_enum(Object *obj, Visitor *v, const char *name,
     int value;
     Error *err = NULL;

-    visit_type_enum(v, name, &value, prop->strings, NULL, &err);
+    visit_type_enum(v, name, &value, prop->strings, &err);
     if (err) {
         error_propagate(errp, err);
         return;
@@ -1878,7 +1878,7 @@ static void property_get_tm(Object *obj, Visitor *v, const char *name,
         goto out;
     }

-    visit_start_struct(v, name, NULL, "struct tm", 0, &err);
+    visit_start_struct(v, name, NULL, 0, &err);
     if (err) {
         goto out;
     }
diff --git a/scripts/qapi-event.py b/scripts/qapi-event.py
index baf5f74..1bef611 100644
--- a/scripts/qapi-event.py
+++ b/scripts/qapi-event.py
@@ -63,7 +63,7 @@ def gen_event_send(name, arg_type):
     qov = qmp_output_visitor_new();
     v = qmp_output_get_visitor(qov);

-    visit_start_struct(v, "%(name)s", NULL, NULL, 0, &err);
+    visit_start_struct(v, "%(name)s", NULL, 0, &err);
 ''',
                      name=name)
         ret += gen_err_check()
diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py
index ca28b08..8a741b6 100644
--- a/scripts/qapi-visit.py
+++ b/scripts/qapi-visit.py
@@ -122,7 +122,7 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
 {
     Error *err = NULL;

-    visit_start_struct(v, name, (void **)obj, "%(name)s", sizeof(%(c_name)s), &err);
+    visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
     if (err) {
         goto out;
     }
@@ -138,7 +138,7 @@ out:
     error_propagate(errp, err);
 }
 ''',
-                 name=name, c_name=c_name(name))
+                 c_name=c_name(name))

     return ret

@@ -183,11 +183,11 @@ def gen_visit_enum(name):
 void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s *obj, Error **errp)
 {
     int tmp = *obj;
-    visit_type_enum(v, name, &tmp, %(c_name)s_lookup, "%(name)s", errp);
+    visit_type_enum(v, name, &tmp, %(c_name)s_lookup, errp);
     *obj = tmp;
 }
 ''',
-                 c_name=c_name(name), name=name)
+                 c_name=c_name(name))


 def gen_visit_alternate(name, variants):
@@ -259,7 +259,7 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
 {
     Error *err = NULL;

-    visit_start_struct(v, name, (void **)obj, "%(name)s", sizeof(%(c_name)s), &err);
+    visit_start_struct(v, name, (void **)obj, sizeof(%(c_name)s), &err);
     if (err) {
         goto out;
     }
@@ -267,7 +267,7 @@ void visit_type_%(c_name)s(Visitor *v, const char *name, %(c_name)s **obj, Error
         goto out_obj;
     }
 ''',
-                 c_name=c_name(name), name=name)
+                 c_name=c_name(name))

     if base:
         ret += mcgen('''
diff --git a/vl.c b/vl.c
index 7689661..22064f1 100644
--- a/vl.c
+++ b/vl.c
@@ -2840,7 +2840,7 @@ static int object_create(void *opaque, QemuOpts *opts, Error **errp)
     pdict = qemu_opts_to_qdict(opts, NULL);
     v = opts_get_visitor(ov);

-    visit_start_struct(v, NULL, NULL, NULL, 0, &err);
+    visit_start_struct(v, NULL, NULL, 0, &err);
     if (err) {
         goto out;
     }
-- 
2.4.3