Re: [PATCH] virtio/virtio-balloon: Prefer Object* over void* parameter

[Bernhard Beschow]

Am 17. Februar 2022 22:53:50 UTC schrieb Bernhard Beschow <shentey@gmail.com>:
>*opaque is an alias to *obj. Using the ladder makes the code consistent with
>with other devices, e.g. accel/kvm/kvm-all and accel/tcg/tcg-all. It also
>makes the cast more typesafe.
>
>Signed-off-by: Bernhard Beschow <shentey@gmail.com>
>---
> hw/virtio/virtio-balloon.c | 10 +++++-----
> 1 file changed, 5 insertions(+), 5 deletions(-)
>
>diff --git a/hw/virtio/virtio-balloon.c b/hw/virtio/virtio-balloon.c
>index 9a4f491b54..38732d4118 100644
>--- a/hw/virtio/virtio-balloon.c
>+++ b/hw/virtio/virtio-balloon.c
>@@ -241,7 +241,7 @@ static void balloon_stats_get_all(Object *obj, Visitor *v, 
>const char *name,
>                                   void *opaque, Error **errp)
> {
>     Error *err = NULL;
>-    VirtIOBalloon *s = opaque;
>+    VirtIOBalloon *s = VIRTIO_BALLOON(obj);
>     int i;
> 
>     if (!visit_start_struct(v, name, NULL, 0, &err)) {
>@@ -276,7 +276,7 @@ static void balloon_stats_get_poll_interval(Object *obj, 
>Visitor *v,
>                                             const char *name, void *opaque,
>                                             Error **errp)
> {
>-    VirtIOBalloon *s = opaque;
>+    VirtIOBalloon *s = VIRTIO_BALLOON(obj);
>     visit_type_int(v, name, &s->stats_poll_interval, errp);
> }
> 
>@@ -284,7 +284,7 @@ static void balloon_stats_set_poll_interval(Object *obj, 
>Visitor *v,
>                                             const char *name, void *opaque,
>                                             Error **errp)
> {
>-    VirtIOBalloon *s = opaque;
>+    VirtIOBalloon *s = VIRTIO_BALLOON(obj);
>     int64_t value;
> 
>     if (!visit_type_int(v, name, &value, errp)) {
>@@ -1014,12 +1014,12 @@ static void virtio_balloon_instance_init(Object *obj)
>     s->free_page_hint_notify.notify = virtio_balloon_free_page_hint_notify;
> 
>     object_property_add(obj, "guest-stats", "guest statistics",
>-                        balloon_stats_get_all, NULL, NULL, s);
>+                        balloon_stats_get_all, NULL, NULL, NULL);
> 
>     object_property_add(obj, "guest-stats-polling-interval", "int",
>                         balloon_stats_get_poll_interval,
>                         balloon_stats_set_poll_interval,
>-                        NULL, s);
>+                        NULL, NULL);
> }
> 
> static const VMStateDescription vmstate_virtio_balloon = {

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