xen: events: remove unused public functions

I was unable to find any user of these functions in either the
functionality pending for 2.6.39 or the xen/next-2.6.32 branch of
xen.git

An exception to this was xen_gsi_from_irq which did appear to be used
in xen/next-2.6.32's pciback. However in the 2.6.39 version of pciback
xen_pirq_from_irq is, correctly AFAICT, used instead.

Only a minority of functions in events.h use "extern" so drop it from
those places for consistency.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

drivers/xen/events.c

@@ -222,16 +222,6 @@ static unsigned gsi_from_irq(unsigned irq)
 	return info->u.pirq.gsi;
 }
 
-static unsigned vector_from_irq(unsigned irq)
-{
-	struct irq_info *info = info_for_irq(irq);
-
-	BUG_ON(info == NULL);
-	BUG_ON(info->type != IRQT_PIRQ);
-
-	return info->u.pirq.vector;
-}
-
 static enum xen_irq_type type_from_irq(unsigned irq)
 {
 	return info_for_irq(irq)->type;
@@ -716,16 +706,6 @@ out:
 	return rc;
 }
 
-int xen_vector_from_irq(unsigned irq)
-{
-	return vector_from_irq(irq);
-}
-
-int xen_gsi_from_irq(unsigned irq)
-{
-	return gsi_from_irq(irq);
-}
-
 int xen_irq_from_pirq(unsigned pirq)
 {
 	return pirq_to_irq[pirq];

include/xen/events.h

@@ -41,9 +41,9 @@ static inline void notify_remote_via_evtchn(int port)
 	(void)HYPERVISOR_event_channel_op(EVTCHNOP_send, &send);
 }
 
-extern void notify_remote_via_irq(int irq);
+void notify_remote_via_irq(int irq);
 
-extern void xen_irq_resume(void);
+void xen_irq_resume(void);
 
 /* Clear an irq's pending state, in preparation for polling on it */
 void xen_clear_irq_pending(int irq);
@@ -62,7 +62,7 @@ void xen_poll_irq_timeout(int irq, u64 timeout);
 unsigned irq_from_evtchn(unsigned int evtchn);
 
 /* Xen HVM evtchn vector callback */
-extern void xen_hvm_callback_vector(void);
+void xen_hvm_callback_vector(void);
 extern int xen_have_vector_callback;
 int xen_set_callback_via(uint64_t via);
 void xen_evtchn_do_upcall(struct pt_regs *regs);
@@ -81,12 +81,6 @@ int xen_bind_pirq_msi_to_irq(struct pci_dev *dev, struct msi_desc *msidesc,
 /* De-allocates the above mentioned physical interrupt. */
 int xen_destroy_irq(int irq);
 
-/* Return vector allocated to pirq */
-int xen_vector_from_irq(unsigned pirq);
-
-/* Return gsi allocated to pirq */
-int xen_gsi_from_irq(unsigned pirq);
-
 /* Return irq from pirq */
 int xen_irq_from_pirq(unsigned pirq);