x86: Fix mfn_to_virt() to cast MFN to address size.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

diff --git a/xen/include/asm-x86/page.h b/xen/include/asm-x86/page.h
index 9ccfdb8502b81fd2465164ecbf042ac105d05d3c..a58a750d07c289a4a51de4a78e1fb8c2ce97cb99 100644 (file)
--- a/xen/include/asm-x86/page.h
+++ b/xen/include/asm-x86/page.h
@@ -228,7 +228,7 @@ void copy_page_sse2(void *, const void *);
 
 /* Convert between Xen-heap virtual addresses and machine frame numbers. */
 #define virt_to_mfn(va)     (virt_to_maddr(va) >> PAGE_SHIFT)
-#define mfn_to_virt(mfn)    (maddr_to_virt(mfn << PAGE_SHIFT))
+#define mfn_to_virt(mfn)    (maddr_to_virt((paddr_t)(mfn) << PAGE_SHIFT))
 
 /* Convert between machine frame numbers and page-info structures. */
 #define mfn_to_page(mfn)    (frame_table + (mfn))