[PATCH 3/3] xen: pvhvm: make it clearer that XEN_UNPLUG_* individual bits

[Ian Campbell <ian.campbell@citrix.com>]

Make this clear by defining in terms of (1<<N)

XEN_UNPLUG_UNNECESSARY is only used within the kernel and is not
defined as a bit on the unplug IO port. Therefore use a bit which is
outside the potentially valid range of the 16 bit IO port.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
 include/xen/platform_pci.h |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/xen/platform_pci.h b/include/xen/platform_pci.h
index b0dca21..dba26dd 100644
--- a/include/xen/platform_pci.h
+++ b/include/xen/platform_pci.h
@@ -16,11 +16,14 @@
 #define XEN_IOPORT_PROTOVER	(XEN_IOPORT_BASE + 2) /* 1 byte access (R) */
 #define XEN_IOPORT_PRODNUM	(XEN_IOPORT_BASE + 2) /* 2 byte access (W) */
 
-#define XEN_UNPLUG_ALL_IDE_DISKS 1
-#define XEN_UNPLUG_ALL_NICS 2
-#define XEN_UNPLUG_AUX_IDE_DISKS 4
-#define XEN_UNPLUG_ALL 7
-#define XEN_UNPLUG_UNNECESSARY 8
+#define XEN_UNPLUG_ALL_IDE_DISKS	(1<<0)
+#define XEN_UNPLUG_ALL_NICS		(1<<1)
+#define XEN_UNPLUG_AUX_IDE_DISKS	(1<<2)
+#define XEN_UNPLUG_ALL			(XEN_UNPLUG_ALL_IDE_DISKS|\
+					 XEN_UNPLUG_ALL_NICS|\
+					 XEN_UNPLUG_AUX_IDE_DISKS)
+
+#define XEN_UNPLUG_UNNECESSARY 		(1<<16)
 
 static inline int xen_must_unplug_nics(void) {
 #if (defined(CONFIG_XEN_NETDEV_FRONTEND) || \
-- 
1.5.6.5