[XEN PATCH 1/5] xen/hvm: use NULL as a null pointer constant

[Nicola Vetrini <nicola.vetrini@bugseng.com>]

No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
---
 xen/arch/x86/include/asm/hvm/irq.h | 2 +-
 xen/include/public/hvm/save.h      | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/xen/arch/x86/include/asm/hvm/irq.h b/xen/arch/x86/include/asm/hvm/irq.h
index 1817ca6e2d22..87e89993a44f 100644
--- a/xen/arch/x86/include/asm/hvm/irq.h
+++ b/xen/arch/x86/include/asm/hvm/irq.h
@@ -136,7 +136,7 @@ struct hvm_girq_dpci_mapping {
 
 #define NR_ISAIRQS  16
 #define NR_LINK     4
-#define NR_HVM_DOMU_IRQS ARRAY_SIZE(((struct hvm_hw_vioapic *)0)->redirtbl)
+#define NR_HVM_DOMU_IRQS ARRAY_SIZE(((struct hvm_hw_vioapic *)NULL)->redirtbl)
 
 /* Protected by domain's event_lock */
 struct hvm_irq_dpci {
diff --git a/xen/include/public/hvm/save.h b/xen/include/public/hvm/save.h
index 2cf4238daaa1..42e8ff55b5b9 100644
--- a/xen/include/public/hvm/save.h
+++ b/xen/include/public/hvm/save.h
@@ -65,15 +65,15 @@ struct hvm_save_descriptor {
     struct __HVM_SAVE_TYPE_##_x { _type t; char c[_code]; char cpt[1];}
 #endif
 
-#define HVM_SAVE_TYPE(_x) __typeof__ (((struct __HVM_SAVE_TYPE_##_x *)(0))->t)
+#define HVM_SAVE_TYPE(_x) __typeof__ (((struct __HVM_SAVE_TYPE_##_x *)(NULL))->t)
 #define HVM_SAVE_LENGTH(_x) (sizeof (HVM_SAVE_TYPE(_x)))
-#define HVM_SAVE_CODE(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->c))
+#define HVM_SAVE_CODE(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(NULL))->c))
 
 #ifdef __XEN__
-# define HVM_SAVE_TYPE_COMPAT(_x) __typeof__ (((struct __HVM_SAVE_TYPE_COMPAT_##_x *)(0))->t)
+# define HVM_SAVE_TYPE_COMPAT(_x) __typeof__ (((struct __HVM_SAVE_TYPE_COMPAT_##_x *)(NULL))->t)
 # define HVM_SAVE_LENGTH_COMPAT(_x) (sizeof (HVM_SAVE_TYPE_COMPAT(_x)))
 
-# define HVM_SAVE_HAS_COMPAT(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(0))->cpt)-1)
+# define HVM_SAVE_HAS_COMPAT(_x) (sizeof (((struct __HVM_SAVE_TYPE_##_x *)(NULL))->cpt)-1)
 # define HVM_SAVE_FIX_COMPAT(_x, _dst, _size) __HVM_SAVE_FIX_COMPAT_##_x(_dst, _size)
 #endif
 
-- 
2.34.1