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Switch the backend to be, too. Signed-off-by: Jan Beulich --- 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