rust: qdev: const_refs_to_static

Now that const_refs_static can be assumed, convert the members of
the DeviceImpl trait from functions to constants.  This lets the
compiler know that they have a 'static lifetime, and removes the
need for the weird "Box::leak()".

Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250908105005.2119297-10-pbonzini@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index 87a17716fe..8411db8d00 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -172,9 +172,7 @@ impl ObjectImpl for PL011State {
 }
 
 impl DeviceImpl for PL011State {
-    fn vmsd() -> Option<VMStateDescription<Self>> {
-        Some(VMSTATE_PL011)
-    }
+    const VMSTATE: Option<VMStateDescription<Self>> = Some(VMSTATE_PL011);
     const REALIZE: Option<fn(&Self) -> qemu_api::Result<()>> = Some(Self::realize);
 }