[PATCH -v3 1/3] xen-blkback: add remove_requested to xen_blkif and some declares

[Joe Jin <joe.jin@oracle.com>]

Add remove_requested to xen_blkif and some declares.

Signed-off-by: Joe Jin <joe.jin@oracle.com>
Cc: Daniel Stodden <daniel.stodden@citrix.com>
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Annie Li <annie.li@oracle.com>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
---
 drivers/block/xen-blkback/common.h |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index 9e40b28..acda757 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -49,6 +49,7 @@
 	pr_debug(DRV_PFX "(%s:%d) " fmt ".\n",	\
 		 __func__, __LINE__, ##args)
 
+#define WPRINTK(fmt, args...) printk(KERN_WARNING "xen-blkback: " fmt, ##args)
 
 /* Not a real protocol.  Used to generate ring structs which contain
  * the elements common to all protocols only.  This way we get a
@@ -145,6 +146,7 @@ struct xen_blkif {
 	/* Back pointer to the backend_info. */
 	struct backend_info	*be;
 	/* Private fields. */
+	bool			remove_requested;
 	spinlock_t		blk_ring_lock;
 	atomic_t		refcnt;
 
@@ -198,6 +200,9 @@ int xen_blkbk_flush_diskcache(struct xenbus_transaction xbt,
 
 struct xenbus_device *xen_blkbk_xenbus(struct backend_info *be);
 
+void xen_vbd_sync(struct xen_vbd *vbd);
+void xen_blkback_close(struct xen_blkif *blkif);
+
 static inline void blkif_get_x86_32_req(struct blkif_request *dst,
 					struct blkif_x86_32_request *src)
 {