Grab lock around registering watch.

Signed-off-by: Rusty Russel <rusty@rustcorp.com.au>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>

diff --git a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
index c3d453047c4b9470a6b292ac84f1fae50bff6ab0..b703bcce7d01230339bb1edde45f4c91c35bec22 100644 (file)
--- a/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
+++ b/linux-2.6-xen-sparse/drivers/xen/xenbus/xenbus_probe.c
@@ -262,7 +262,9 @@ int do_xenbus_probe(void *unused)
        /* Enumerate devices in xenstore. */
        xenbus_probe_devices("device");
 
+       down(&xenbus_lock);
        register_xenbus_watch(&dev_watch);
+       up(&xenbus_lock);
        return 0;
 }