XSM: make .kexec() hook dependent upon KEXEC=y

It's unreachable / dead otherwise.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Daniel P. Smith <dpsmith@apertussolutions.com>

xen/include/xsm/dummy.h

@@ -271,11 +271,13 @@ static XSM_INLINE int cf_check xsm_console_io(
     return xsm_default_action(XSM_PRIV, d, NULL);
 }
 
+#ifdef CONFIG_KEXEC
 static XSM_INLINE int cf_check xsm_kexec(XSM_DEFAULT_VOID)
 {
     XSM_ASSERT_ACTION(XSM_PRIV);
     return xsm_default_action(action, current->domain, NULL);
 }
+#endif
 
 static XSM_INLINE int cf_check xsm_schedop_shutdown(
     XSM_DEFAULT_ARG struct domain *d1, struct domain *d2)

xen/include/xsm/hooks.h

@@ -61,7 +61,9 @@ XSM_HOOK(int, claim_pages, struct domain *)
 
 XSM_HOOK(int, console_io, struct domain *, int)
 
+#ifdef CONFIG_KEXEC
 XSM_HOOK(int, kexec)
+#endif
 
 XSM_HOOK(int, schedop_shutdown, struct domain *, struct domain *)
 

xen/xsm/flask/hooks.c

@@ -536,10 +536,12 @@ static int cf_check flask_console_io(struct domain *d, int cmd)
     return domain_has_xen(d, perm);
 }
 
+#ifdef CONFIG_KEXEC
 static int cf_check flask_kexec(void)
 {
     return domain_has_xen(current->domain, XEN__KEXEC);
 }
+#endif
 
 static int cf_check flask_schedop_shutdown(struct domain *d1, struct domain *d2)
 {