These hooks were introduced in:

80a1ea3748 ("memory: move ioeventfd ops to MemoryListener", 2012-02-29)

But they seem to be never used.  Drop them.

Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 hw/virtio/vhost.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index eb8c4c378c..c713dc5d9d 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -1291,18 +1291,6 @@ void vhost_virtqueue_stop(struct vhost_dev *dev,
                        0, virtio_queue_get_desc_size(vdev, idx));
 }
 
-static void vhost_eventfd_add(MemoryListener *listener,
-                              MemoryRegionSection *section,
-                              bool match_data, uint64_t data, EventNotifier *e)
-{
-}
-
-static void vhost_eventfd_del(MemoryListener *listener,
-                              MemoryRegionSection *section,
-                              bool match_data, uint64_t data, EventNotifier *e)
-{
-}
-
 static int vhost_virtqueue_set_busyloop_timeout(struct vhost_dev *dev,
                                                 int n, uint32_t timeout)
 {
@@ -1457,8 +1445,6 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
         .log_sync = vhost_log_sync,
         .log_global_start = vhost_log_global_start,
         .log_global_stop = vhost_log_global_stop,
-        .eventfd_add = vhost_eventfd_add,
-        .eventfd_del = vhost_eventfd_del,
         .priority = 10
     };
 
-- 
2.39.1

On Tue, Mar 7, 2023 at 3:32 AM Peter Xu <peterx@redhat.com> wrote:
>
> These hooks were introduced in:
>
> 80a1ea3748 ("memory: move ioeventfd ops to MemoryListener", 2012-02-29)
>
> But they seem to be never used.  Drop them.
>
> Cc: Richard Henderson <rth@twiddle.net>
> Signed-off-by: Peter Xu <peterx@redhat.com>

Acked-by: Jason Wang <jasowang@redhat.com>

Thanks

> ---
>  hw/virtio/vhost.c | 14 --------------
>  1 file changed, 14 deletions(-)
>
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index eb8c4c378c..c713dc5d9d 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -1291,18 +1291,6 @@ void vhost_virtqueue_stop(struct vhost_dev *dev,
>                         0, virtio_queue_get_desc_size(vdev, idx));
>  }
>
> -static void vhost_eventfd_add(MemoryListener *listener,
> -                              MemoryRegionSection *section,
> -                              bool match_data, uint64_t data, EventNotifier *e)
> -{
> -}
> -
> -static void vhost_eventfd_del(MemoryListener *listener,
> -                              MemoryRegionSection *section,
> -                              bool match_data, uint64_t data, EventNotifier *e)
> -{
> -}
> -
>  static int vhost_virtqueue_set_busyloop_timeout(struct vhost_dev *dev,
>                                                  int n, uint32_t timeout)
>  {
> @@ -1457,8 +1445,6 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
>          .log_sync = vhost_log_sync,
>          .log_global_start = vhost_log_global_start,
>          .log_global_stop = vhost_log_global_stop,
> -        .eventfd_add = vhost_eventfd_add,
> -        .eventfd_del = vhost_eventfd_del,
>          .priority = 10
>      };
>
> --
> 2.39.1
>

On 6/3/23 20:32, Peter Xu wrote:
> These hooks were introduced in:
> 
> 80a1ea3748 ("memory: move ioeventfd ops to MemoryListener", 2012-02-29)
> 
> But they seem to be never used.  Drop them.

Similar to bf83601fdd ("xen: drop no-op MemoryListener callbacks") few
months later...

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

> Cc: Richard Henderson <rth@twiddle.net>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>   hw/virtio/vhost.c | 14 --------------
>   1 file changed, 14 deletions(-)