ipv4: coding style: comparison for equality with NULL

The ipv4 code uses a mixture of coding styles. In some instances check
for NULL pointer is done as x == NULL and sometimes as !x. !x is
preferred according to checkpatch and this patch makes the code
consistent by adopting the latter form.

No changes detected by objdiff.

Signed-off-by: Ian Morris <ipm@chirality.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 6 deletions

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index ad09213ac5b2..27d204b834f9 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -692,7 +692,7 @@ static int igmp_send_report(struct in_device *in_dev, struct ip_mc_list *pmc,
         hlen = LL_RESERVED_SPACE(dev);
         tlen = dev->needed_tailroom;
         skb = alloc_skb(IGMP_SIZE + hlen + tlen, GFP_ATOMIC);
-        if (skb == NULL) {
+        if (!skb) {
                 ip_rt_put(rt);
                 return -1;
         }
@@ -981,7 +981,7 @@ int igmp_rcv(struct sk_buff *skb)
         int len = skb->len;
         bool dropped = true;
 
-        if (in_dev == NULL)
+        if (!in_dev)
                 goto drop;
 
         if (!pskb_may_pull(skb, sizeof(struct igmphdr)))
@@ -1888,7 +1888,7 @@ int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr)
         if (count >= sysctl_igmp_max_memberships)
                 goto done;
         iml = sock_kmalloc(sk, sizeof(*iml), GFP_KERNEL);
-        if (iml == NULL)
+        if (!iml)
                 goto done;
 
         memcpy(&iml->multi, imr, sizeof(*imr));
@@ -1909,7 +1909,7 @@ static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml,
         struct ip_sf_socklist *psf = rtnl_dereference(iml->sflist);
         int err;
 
-        if (psf == NULL) {
+        if (!psf) {
                 /* any-source empty exclude case */
                 return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
                         iml->sfmode, 0, NULL, 0);
@@ -2360,7 +2360,7 @@ void ip_mc_drop_socket(struct sock *sk)
         struct ip_mc_socklist *iml;
         struct net *net = sock_net(sk);
 
-        if (inet->mc_list == NULL)
+        if (!inet->mc_list)
                 return;
 
         rtnl_lock();
@@ -2587,7 +2587,7 @@ static inline struct ip_sf_list *igmp_mcf_get_first(struct seq_file *seq)
         for_each_netdev_rcu(net, state->dev) {
                 struct in_device *idev;
                 idev = __in_dev_get_rcu(state->dev);
-                if (unlikely(idev == NULL))
+                if (unlikely(!idev))
                         continue;
                 im = rcu_dereference(idev->mc_list);
                 if (likely(im != NULL)) {