[NET]: sparse warning fixes

Fix a bunch of sparse warnings. Mostly about 0 used as
NULL pointer, and shadowed variable declarations.
One notable case was that hash size should have been unsigned.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/ipv6/anycast.c b/net/ipv6/anycast.c
index d407992c1481..5810852c558a 100644
--- a/net/ipv6/anycast.c
+++ b/net/ipv6/anycast.c
@@ -414,7 +414,7 @@ static int ipv6_chk_acast_dev(struct net_device *dev, struct in6_addr *addr)
                                 break;
                 read_unlock_bh(&idev->lock);
                 in6_dev_put(idev);
-                return aca != 0;
+                return aca != NULL;
         }
         return 0;
 }