vhost: fix TUN=m VHOST_NET=y

drivers/built-in.o: In function `get_tun_socket':
    net.c:(.text+0x15436e): undefined reference to `tun_get_socket'

If tun is a module, vhost must be a module, too.
If tun is built-in or disabled, vhost can be built-in.

Note: TUN || !TUN might look a bit strange until you realize
that boolean logic rules do not apply for tristate variables.

Reported-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/vhost/Kconfig b/drivers/vhost/Kconfig
index 9f409f4..9e93553 100644 (file)
--- a/drivers/vhost/Kconfig
+++ b/drivers/vhost/Kconfig
@@ -1,6 +1,6 @@
 config VHOST_NET
        tristate "Host kernel accelerator for virtio net (EXPERIMENTAL)"
-       depends on NET && EVENTFD && EXPERIMENTAL
+       depends on NET && EVENTFD && (TUN || !TUN) && EXPERIMENTAL
        ---help---
          This kernel module can be loaded in host kernel to accelerate
          guest networking with virtio_net. Not to be confused with virtio_net