net: ipv4: provide __rcu annotation for ifa_list

ifa_list is protected by rcu, yet code doesn't reflect this.

Add the __rcu annotations and fix up all places that are now reported by
sparse.

I've done this in the same commit to not add intermediate patches that
result in new warnings.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
index feb92ecd1880..3e3ac2e496a1 100644
--- a/drivers/net/plip/plip.c
+++ b/drivers/net/plip/plip.c
@@ -1012,7 +1012,7 @@ plip_rewrite_address(const struct net_device *dev, struct ethhdr *eth)
         in_dev = __in_dev_get_rcu(dev);
         if (in_dev) {
                 /* Any address will do - we take the first */
-                const struct in_ifaddr *ifa = in_dev->ifa_list;
+                const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
                 if (ifa) {
                         memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
                         memset(eth->h_dest, 0xfc, 2);
@@ -1107,7 +1107,7 @@ plip_open(struct net_device *dev)
                 /* Any address will do - we take the first. We already
                    have the first two bytes filled with 0xfc, from
                    plip_init_dev(). */
-                struct in_ifaddr *ifa=in_dev->ifa_list;
+                const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
                 if (ifa != NULL) {
                         memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
                 }