Various warnings appeared since 3.4 - eliminate at least some of them.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- 2009-11-30.orig/xen/arch/ia64/linux-xen/unwind.c	2009-06-29 12:33:51.000000000 +0200
+++ 2009-11-30/xen/arch/ia64/linux-xen/unwind.c	2009-11-30 10:52:24.000000000 +0100
@@ -38,7 +38,7 @@
 // work around
 // write_trylock() does bug check, but stack unwinder can be called
 // subtle situation, so skip bug check.
-#undef write_trylock(lock)
+#undef write_trylock
 #ifdef CONFIG_SMP
 #define write_trylock(lock)	_raw_write_trylock(lock)
 #else
--- 2009-11-30.orig/xen/arch/ia64/xen/mm.c	2009-10-15 11:42:12.000000000 +0200
+++ 2009-11-30/xen/arch/ia64/xen/mm.c	2009-11-30 10:48:04.000000000 +0100
@@ -2875,6 +2875,7 @@ donate_page(struct domain *d, struct pag
 {
     /* needs to be implemented for transcendent memory (tmem) */
     ASSERT(0);
+    return -ENOSYS;
 }
 
 static void
--- 2009-11-30.orig/xen/common/tmem_xen.c	2009-11-23 11:23:30.000000000 +0100
+++ 2009-11-30/xen/common/tmem_xen.c	2009-11-30 10:49:16.000000000 +0100
@@ -84,6 +84,7 @@ void tmh_copy_page(char *to, char*from)
 static inline void *cli_mfn_to_va(tmem_cli_mfn_t cmfn, unsigned long *pcli_mfn)
 {
     ASSERT(0);
+    return NULL;
 }
 #define paging_mark_dirty(_x,_y) do {} while(0)
 #else
--- 2009-11-30.orig/xen/drivers/passthrough/vtd/ia64/ats.c	2009-06-03 12:22:45.000000000 +0200
+++ 2009-11-30/xen/drivers/passthrough/vtd/ia64/ats.c	2009-11-30 10:54:58.000000000 +0100
@@ -28,6 +28,8 @@
 #include "../vtd.h"
 #include "../extern.h"
 
+struct pci_ats_dev;
+
 int ats_enabled = 0;
 
 struct acpi_drhd_unit * find_ats_dev_drhd(struct iommu *iommu)
@@ -45,12 +47,6 @@ int enable_ats_device(int seg, int bus, 
     return 0;
 }        
 
-static int device_in_domain(struct iommu *iommu,
-                            struct pci_ats_dev *pdev, u16 did)
-{
-    return 0;
-}
-
 int dev_invalidate_iotlb(struct iommu *iommu, u16 did,
     u64 addr, unsigned int size_order, u64 type)
 {
--- 2009-11-30.orig/xen/include/asm-ia64/hvm/support.h	2009-10-01 10:53:02.000000000 +0200
+++ 2009-11-30/xen/include/asm-ia64/hvm/support.h	2009-11-30 10:44:29.000000000 +0100
@@ -25,13 +25,14 @@
 
 #include <xen/hvm/save.h>
 
-static int hvm_girq_dest_2_vcpu_id(struct domain *d, uint8_t dest,
+static inline int hvm_girq_dest_2_vcpu_id(struct domain *d, uint8_t dest,
                                 uint8_t dest_mode)
 {
     /* TODO */
+    return -ENOSYS;
 }
 
-static void hvm_migrate_pirqs(struct vcpu *v)
+static inline void hvm_migrate_pirqs(struct vcpu *v)
 {
     /* TODO */
 }