netpoll: add RCU annotation to npinfo field

dev->npinfo is protected by RCU.

This fixes the following sparse warnings:

net/core/netpoll.c:177:48: error: incompatible types in comparison expression (different address spaces)
net/core/netpoll.c:200:35: error: incompatible types in comparison expression (different address spaces)
net/core/netpoll.c:221:35: error: incompatible types in comparison expression (different address spaces)
net/core/netpoll.c:327:18: error: incompatible types in comparison expression (different address spaces)

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

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 549f5ad2055d06f0f4f0580d0068e41f9e3271cf..85b0949d9946808b7f5dbc01c3935691f94fd9dc 100644 (file)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1272,7 +1272,7 @@ struct net_device {
        void (*destructor)(struct net_device *dev);
 
 #ifdef CONFIG_NETPOLL
-       struct netpoll_info     *npinfo;
+       struct netpoll_info __rcu       *npinfo;
 #endif
 
 #ifdef CONFIG_NET_NS