xen/blkback: add accessor for xenbus backend device

Since backend_info is hidden away now.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>

3 files changed, 8 insertions, 1 deletions

diff --git a/drivers/xen/blkback/common.h b/drivers/xen/blkback/common.h
index cebcc2b7e9f6..0f91830f18c8 100644
--- a/drivers/xen/blkback/common.h
+++ b/drivers/xen/blkback/common.h
@@ -136,4 +136,6 @@ int blkif_schedule(void *arg);
 int blkback_barrier(struct xenbus_transaction xbt,
                     struct backend_info *be, int state);
 
+struct xenbus_device *blkback_xenbus(struct backend_info *be);
+
 #endif /* __BLKIF__BACKEND__COMMON_H__ */
diff --git a/drivers/xen/blkback/vbd.c b/drivers/xen/blkback/vbd.c
index 0635c54079f8..943ec2313522 100644
--- a/drivers/xen/blkback/vbd.c
+++ b/drivers/xen/blkback/vbd.c
@@ -123,7 +123,7 @@ void vbd_resize(blkif_t *blkif)
         struct vbd *vbd = &blkif->vbd;
         struct xenbus_transaction xbt;
         int err;
-        struct xenbus_device *dev = blkif->be->dev;
+        struct xenbus_device *dev = blkback_xenbus(blkif->be);
         unsigned long long new_size = vbd_size(vbd);
 
         printk(KERN_INFO "VBD Resize: new size %Lu\n", new_size);
diff --git a/drivers/xen/blkback/xenbus.c b/drivers/xen/blkback/xenbus.c
index 34f8e4046578..c31e5c40b45c 100644
--- a/drivers/xen/blkback/xenbus.c
+++ b/drivers/xen/blkback/xenbus.c
@@ -42,6 +42,11 @@ static int connect_ring(struct backend_info *);
 static void backend_changed(struct xenbus_watch *, const char **,
                             unsigned int);
 
+struct xenbus_device *blkback_xenbus(struct backend_info *be)
+{
+        return be->dev;
+}
+
 static int blkback_name(blkif_t *blkif, char *buf)
 {
         char *devpath, *devname;