diff options
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/pvcalls-back.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c index f3d0daad3da6..9044cf21b31c 100644 --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -25,6 +25,11 @@ #include <xen/xenbus.h> #include <xen/interface/io/pvcalls.h> +struct pvcalls_back_global { + struct list_head frontends; + struct semaphore frontends_lock; +} pvcalls_back_global; + static int pvcalls_back_probe(struct xenbus_device *dev, const struct xenbus_device_id *id) { @@ -59,3 +64,20 @@ static struct xenbus_driver pvcalls_back_driver = { .uevent = pvcalls_back_uevent, .otherend_changed = pvcalls_back_changed, }; + +static int __init pvcalls_back_init(void) +{ + int ret; + + if (!xen_domain()) + return -ENODEV; + + ret = xenbus_register_backend(&pvcalls_back_driver); + if (ret < 0) + return ret; + + sema_init(&pvcalls_back_global.frontends_lock, 1); + INIT_LIST_HEAD(&pvcalls_back_global.frontends); + return 0; +} +module_init(pvcalls_back_init); |