qapi: Use QAPI_LIST_PREPEND() where possible

Anywhere we create a list of just one item or by prepending items
(typically because order doesn't matter), we can use
QAPI_LIST_PREPEND().  But places where we must keep the list in order
by appending remain open-coded until later patches.

Note that as a side effect, this also performs a cleanup of two minor
issues in qga/commands-posix.c: the old code was performing
 new = g_malloc0(sizeof(*ret));
which 1) is confusing because you have to verify whether 'new' and
'ret' are variables with the same type, and 2) would conflict with C++
compilation (not an actual problem for this file, but makes
copy-and-paste harder).

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20201113011340.463563-5-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
[Straightforward conflicts due to commit a8aa94b5f8 "qga: update
schema for guest-get-disks 'dependents' field" and commit a10b453a52
"target/mips: Move mips_cpu_add_definition() from helper.c to cpu.c"
resolved.  Commit message tweaked.]
Signed-off-by: Markus Armbruster <armbru@redhat.com>

1 files changed, 2 insertions, 10 deletions

diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
index a4d0038828..3c05a17343 100644
--- a/target/ppc/translate_init.c.inc
+++ b/target/ppc/translate_init.c.inc
@@ -10566,7 +10566,6 @@ static void ppc_cpu_defs_entry(gpointer data, gpointer user_data)
     ObjectClass *oc = data;
     CpuDefinitionInfoList **first = user_data;
     const char *typename;
-    CpuDefinitionInfoList *entry;
     CpuDefinitionInfo *info;
 
     typename = object_class_get_name(oc);
@@ -10574,10 +10573,7 @@ static void ppc_cpu_defs_entry(gpointer data, gpointer user_data)
     info->name = g_strndup(typename,
                            strlen(typename) - strlen(POWERPC_CPU_TYPE_SUFFIX));
 
-    entry = g_malloc0(sizeof(*entry));
-    entry->value = info;
-    entry->next = *first;
-    *first = entry;
+    QAPI_LIST_PREPEND(*first, info);
 }
 
 CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
@@ -10593,7 +10589,6 @@ CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
     for (i = 0; ppc_cpu_aliases[i].alias != NULL; i++) {
         PowerPCCPUAlias *alias = &ppc_cpu_aliases[i];
         ObjectClass *oc;
-        CpuDefinitionInfoList *entry;
         CpuDefinitionInfo *info;
 
         oc = ppc_cpu_class_by_name(alias->model);
@@ -10605,10 +10600,7 @@ CpuDefinitionInfoList *qmp_query_cpu_definitions(Error **errp)
         info->name = g_strdup(alias->alias);
         info->q_typename = g_strdup(object_class_get_name(oc));
 
-        entry = g_malloc0(sizeof(*entry));
-        entry->value = info;
-        entry->next = cpu_list;
-        cpu_list = entry;
+        QAPI_LIST_PREPEND(cpu_list, info);
     }
 
     return cpu_list;