xen/pvcalls: backend can be a module

It's not clear to me why only the frontend has been tristate. Switch the
backend to be, too.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/54a6070c-92bb-36a3-2fc0-de9ccca438c5@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 5f1ce59b44b95c5bdd4aad5a04dcd61559585eca..a37eb52fb4010750112d38e5e200c291b288fed6 100644 (file)
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -214,7 +214,7 @@ config XEN_PVCALLS_FRONTEND
          implements them.
 
 config XEN_PVCALLS_BACKEND
-       bool "XEN PV Calls backend driver"
+       tristate "XEN PV Calls backend driver"
        depends on INET && XEN && XEN_BACKEND
        help
          Experimental backend for the Xen PV Calls protocol