vhost-net: add module alias (v2.1)

By adding some module aliases, programs (or users) won't have to explicitly
call modprobe. Vhost-net will always be available if built into the kernel.
It does require assigning a permanent minor number for depmod to work.

Also:
  - use C99 style initialization.
  - add missing entry in documentation for loop-control

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-By: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 9 insertions, 3 deletions

diff --git a/Documentation/devices.txt b/Documentation/devices.txt
index cec8864ce4e8..00383186d8fb 100644
--- a/Documentation/devices.txt
+++ b/Documentation/devices.txt
@@ -447,6 +447,9 @@ Your cooperation is appreciated.
                 234 = /dev/btrfs-control        Btrfs control device
                 235 = /dev/autofs       Autofs control device
                 236 = /dev/mapper/control       Device-Mapper control device
+                237 = /dev/loop-control Loopback control device
+                238 = /dev/vhost-net    Host kernel accelerator for virtio net
+
                 240-254                 Reserved for local use
                 255                     Reserved for MISC_DYNAMIC_MINOR
 
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 882a51fe7b3c..9dab1f51dd43 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -856,9 +856,9 @@ static const struct file_operations vhost_net_fops = {
 };
 
 static struct miscdevice vhost_net_misc = {
-        MISC_DYNAMIC_MINOR,
-        "vhost-net",
-        &vhost_net_fops,
+        .minor = VHOST_NET_MINOR,
+        .name = "vhost-net",
+        .fops = &vhost_net_fops,
 };
 
 static int vhost_net_init(void)
@@ -879,3 +879,5 @@ MODULE_VERSION("0.0.1");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Michael S. Tsirkin");
 MODULE_DESCRIPTION("Host kernel accelerator for virtio net");
+MODULE_ALIAS_MISCDEV(VHOST_NET_MINOR);
+MODULE_ALIAS("devname:vhost-net");
diff --git a/include/linux/miscdevice.h b/include/linux/miscdevice.h
index 32085249e9cb..0549d2115507 100644
--- a/include/linux/miscdevice.h
+++ b/include/linux/miscdevice.h
@@ -42,6 +42,7 @@
 #define AUTOFS_MINOR            235
 #define MAPPER_CTRL_MINOR       236
 #define LOOP_CTRL_MINOR         237
+#define VHOST_NET_MINOR         238
 #define MISC_DYNAMIC_MINOR      255
 
 struct device;