1 files changed, 2 insertions, 1 deletions

diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c
index 1f5d7ac82e97..73d903ca2d64 100644
--- a/arch/ia64/xen/xencomm.c
+++ b/arch/ia64/xen/xencomm.c
@@ -17,6 +17,7 @@
  */
 
 #include <linux/mm.h>
+#include <linux/err.h>
 
 static unsigned long kernel_virtual_offset;
 static int is_xencomm_initialized;
@@ -98,7 +99,7 @@ xencomm_vtop(unsigned long vaddr)
 
         /* We assume the page is modified.  */
         page = follow_page(vma, vaddr, FOLL_WRITE | FOLL_TOUCH);
-        if (!page)
+        if (IS_ERR_OR_NULL(page))
                 return ~0UL;
 
         return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK);