xen64: smp.c compile hacking

A number of random changes to make xen/smp.c compile in 64-bit mode.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>a
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index e0a3959..f52f385 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -98,7 +98,7 @@
 	/* Mask events on entry, even though they get enabled immediately */
 	static struct callback_register sysenter = {
 		.type = CALLBACKTYPE_sysenter,
-		.address = { __KERNEL_CS, (unsigned long)xen_sysenter_target },
+		.address = XEN_CALLBACK(__KERNEL_CS, xen_sysenter_target),
 		.flags = CALLBACKF_mask_events,
 	};
 
@@ -143,11 +143,6 @@
 
 	pm_idle = xen_idle;
 
-#ifdef CONFIG_SMP
-	/* fill cpus_possible with all available cpus */
-	xen_fill_possible_map();
-#endif
-
 	paravirt_disable_iospace();
 
 	fiddle_vdso();