net: loopback driver cleanup

loopback driver uses dev->ml_priv to store its percpu stats pointer.
It uses ugly casts "(void __percpu __force *)" to shut up sparse
complains.

Define an union to better document we use ml_priv in loopback driver and
define a lstats field with appropriate types.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 45dcda5bfda9..01bd4c82d982 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1050,8 +1050,10 @@ struct net_device {
 #endif
 
         /* mid-layer private */
-        void                    *ml_priv;
-
+        union {
+                void                            *ml_priv;
+                struct pcpu_lstats __percpu     *lstats; /* loopback stats */
+        };
         /* GARP */
         struct garp_port        *garp_port;