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, 5 deletions

diff --git a/tests/test-clone-visitor.c b/tests/test-clone-visitor.c
index 5e1e8b2f5e..4944b3d857 100644
--- a/tests/test-clone-visitor.c
+++ b/tests/test-clone-visitor.c
@@ -65,16 +65,13 @@ static void test_clone_alternate(void)
 
 static void test_clone_list_union(void)
 {
-    uint8List *src, *dst;
+    uint8List *src = NULL, *dst;
     uint8List *tmp = NULL;
     int i;
 
     /* Build list in reverse */
     for (i = 10; i; i--) {
-        src = g_new0(uint8List, 1);
-        src->next = tmp;
-        src->value = i;
-        tmp = src;
+        QAPI_LIST_PREPEND(src, i);
     }
 
     dst = QAPI_CLONE(uint8List, src);