Call Loader.kernelInitExtra() on restore (earlier called Loader.initDone()).

The kernel init extra function was not being called on restore.

PiperOrigin-RevId: 652026617

runsc/boot/loader.go

@@ -628,7 +628,7 @@ func New(args Args) (*Loader, error) {
 		enableAutosave(l, args.Conf.TestOnlyAutosaveResume, l.saveFDs)
 	}
 
-	if err := l.initDone(args); err != nil {
+	if err := l.kernelInitExtra(); err != nil {
 		return nil, err
 	}
 

runsc/boot/restore.go

@@ -276,6 +276,10 @@ func (r *restorer) restore(l *Loader) error {
 
 	l.k.RestoreContainerMapping(l.containerIDs)
 
+	if err := l.kernelInitExtra(); err != nil {
+		return err
+	}
+
 	// Refresh the control server with the newly created kernel.
 	l.ctrl.refreshHandlers()
 

runsc/boot/restore_impl.go

@@ -42,6 +42,6 @@ func newProcInternalData(*specs.Spec) *proc.InternalData {
 	return &proc.InternalData{}
 }
 
-func (l *Loader) initDone(args Args) error {
+func (l *Loader) kernelInitExtra() error {
 	return nil
 }