[PATCH] sparse: NULL vs 0 - net/*

net/core/net-sysfs.c

@@ -356,7 +356,7 @@ static int netdev_hotplug(struct class_device *cd, char **envp,
 	if ((size <= 0) || (i >= num_envp))
 		return -ENOMEM;
 
-	envp[i] = 0;
+	envp[i] = NULL;
 	return 0;
 }
 #endif

net/core/sock.c

@@ -667,7 +667,7 @@ void sk_free(struct sock *sk)
 void __init sk_init(void)
 {
 	sk_cachep = kmem_cache_create("sock", sizeof(struct sock), 0,
-				      SLAB_HWCACHE_ALIGN, 0, 0);
+				      SLAB_HWCACHE_ALIGN, NULL, NULL);
 	if (!sk_cachep)
 		printk(KERN_CRIT "sk_init: Cannot create sock SLAB cache!");
 

net/ipv4/af_inet.c

@@ -1018,13 +1018,13 @@ static int __init inet_init(void)
 
 	tcp_sk_cachep = kmem_cache_create("tcp_sock",
 					  sizeof(struct tcp_sock), 0,
-					  SLAB_HWCACHE_ALIGN, 0, 0);
+					  SLAB_HWCACHE_ALIGN, NULL, NULL);
 	udp_sk_cachep = kmem_cache_create("udp_sock",
 					  sizeof(struct udp_sock), 0,
-					  SLAB_HWCACHE_ALIGN, 0, 0);
+					  SLAB_HWCACHE_ALIGN, NULL, NULL);
 	raw4_sk_cachep = kmem_cache_create("raw4_sock",
 					   sizeof(struct raw_sock), 0,
-					   SLAB_HWCACHE_ALIGN, 0, 0);
+					   SLAB_HWCACHE_ALIGN, NULL, NULL);
 	if (!tcp_sk_cachep || !udp_sk_cachep || !raw4_sk_cachep)
 		printk(KERN_CRIT
 		       "inet_init: Can't create protocol sock SLAB caches!\n");

net/ipv4/igmp.c

@@ -279,7 +279,7 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 
 	skb = alloc_skb(size + LL_RESERVED_SPACE(dev), GFP_ATOMIC);
 	if (skb == NULL)
-		return 0;
+		return NULL;
 
 	{
 		struct flowi fl = { .oif = dev->ifindex,
@@ -288,13 +288,13 @@ static struct sk_buff *igmpv3_newpack(struct net_device *dev, int size)
 				    .proto = IPPROTO_IGMP };
 		if (ip_route_output_key(&rt, &fl)) {
 			kfree_skb(skb);
-			return 0;
+			return NULL;
 		}
 	}
 	if (rt->rt_src == 0) {
 		kfree_skb(skb);
 		ip_rt_put(rt);
-		return 0;
+		return NULL;
 	}
 
 	skb->dst = &rt->u.dst;
@@ -361,7 +361,7 @@ static struct sk_buff *add_grhead(struct sk_buff *skb, struct ip_mc_list *pmc,
 	if (!skb)
 		skb = igmpv3_newpack(dev, dev->mtu);
 	if (!skb)
-		return 0;
+		return NULL;
 	pgr = (struct igmpv3_grec *)skb_put(skb, sizeof(struct igmpv3_grec));
 	pgr->grec_type = type;
 	pgr->grec_auxwords = 0;
@@ -381,7 +381,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 {
 	struct net_device *dev = pmc->interface->dev;
 	struct igmpv3_report *pih;
-	struct igmpv3_grec *pgr = 0;
+	struct igmpv3_grec *pgr = NULL;
 	struct ip_sf_list *psf, *psf_next, *psf_prev, **psf_list;
 	int scount, first, isquery, truncate;
 
@@ -406,13 +406,13 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 			if (skb && AVAILABLE(skb) < sizeof(struct igmpv3_grec)+
 			    sizeof(__u32)) {
 				igmpv3_sendpack(skb);
-				skb = 0; /* add_grhead will get a new one */
+				skb = NULL; /* add_grhead will get a new one */
 			}
 			skb = add_grhead(skb, pmc, type, &pgr);
 		}
 		return skb;
 	}
-	pih = skb ? (struct igmpv3_report *)skb->h.igmph : 0;
+	pih = skb ? (struct igmpv3_report *)skb->h.igmph : NULL;
 
 	/* EX and TO_EX get a fresh packet, if needed */
 	if (truncate) {
@@ -425,7 +425,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 	}
 	first = 1;
 	scount = 0;
-	psf_prev = 0;
+	psf_prev = NULL;
 	for (psf=*psf_list; psf; psf=psf_next) {
 		u32 *psrc;
 
@@ -483,7 +483,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ip_mc_list *pmc,
 
 static int igmpv3_send_report(struct in_device *in_dev, struct ip_mc_list *pmc)
 {
-	struct sk_buff *skb = 0;
+	struct sk_buff *skb = NULL;
 	int type;
 
 	if (!pmc) {
@@ -521,7 +521,7 @@ static void igmpv3_clear_zeros(struct ip_sf_list **ppsf)
 {
 	struct ip_sf_list *psf_prev, *psf_next, *psf;
 
-	psf_prev = 0;
+	psf_prev = NULL;
 	for (psf=*ppsf; psf; psf = psf_next) {
 		psf_next = psf->sf_next;
 		if (psf->sf_crcount == 0) {
@@ -538,14 +538,14 @@ static void igmpv3_clear_zeros(struct ip_sf_list **ppsf)
 static void igmpv3_send_cr(struct in_device *in_dev)
 {
 	struct ip_mc_list *pmc, *pmc_prev, *pmc_next;
-	struct sk_buff *skb = 0;
+	struct sk_buff *skb = NULL;
 	int type, dtype;
 
 	read_lock(&in_dev->lock);
 	write_lock_bh(&in_dev->mc_lock);
 
 	/* deleted MCA's */
-	pmc_prev = 0;
+	pmc_prev = NULL;
 	for (pmc=in_dev->mc_tomb; pmc; pmc=pmc_next) {
 		pmc_next = pmc->next;
 		if (pmc->sfmode == MCAST_INCLUDE) {
@@ -681,7 +681,7 @@ static void igmp_gq_timer_expire(unsigned long data)
 	struct in_device *in_dev = (struct in_device *)data;
 
 	in_dev->mr_gq_running = 0;
-	igmpv3_send_report(in_dev, 0);
+	igmpv3_send_report(in_dev, NULL);
 	__in_dev_put(in_dev);
 }
 
@@ -976,7 +976,7 @@ static void igmpv3_add_delrec(struct in_device *in_dev, struct ip_mc_list *im)
 
 		pmc->tomb = im->tomb;
 		pmc->sources = im->sources;
-		im->tomb = im->sources = 0;
+		im->tomb = im->sources = NULL;
 		for (psf=pmc->sources; psf; psf=psf->sf_next)
 			psf->sf_crcount = pmc->crcount;
 	}
@@ -994,7 +994,7 @@ static void igmpv3_del_delrec(struct in_device *in_dev, __u32 multiaddr)
 	struct ip_sf_list *psf, *psf_next;
 
 	write_lock_bh(&in_dev->mc_lock);
-	pmc_prev = 0;
+	pmc_prev = NULL;
 	for (pmc=in_dev->mc_tomb; pmc; pmc=pmc->next) {
 		if (pmc->multiaddr == multiaddr)
 			break;
@@ -1023,7 +1023,7 @@ static void igmpv3_clear_delrec(struct in_device *in_dev)
 
 	write_lock_bh(&in_dev->mc_lock);
 	pmc = in_dev->mc_tomb;
-	in_dev->mc_tomb = 0;
+	in_dev->mc_tomb = NULL;
 	write_unlock_bh(&in_dev->mc_lock);
 
 	for (; pmc; pmc = nextpmc) {
@@ -1039,7 +1039,7 @@ static void igmpv3_clear_delrec(struct in_device *in_dev)
 
 		spin_lock_bh(&pmc->lock);
 		psf = pmc->tomb;
-		pmc->tomb = 0;
+		pmc->tomb = NULL;
 		spin_unlock_bh(&pmc->lock);
 		for (; psf; psf=psf_next) {
 			psf_next = psf->sf_next;
@@ -1135,7 +1135,7 @@ void ip_mc_inc_group(struct in_device *in_dev, u32 addr)
 	for (im=in_dev->mc_list; im; im=im->next) {
 		if (im->multiaddr == addr) {
 			im->users++;
-			ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, 0, 0);
+			ip_mc_add_src(in_dev, &addr, MCAST_EXCLUDE, 0, NULL, 0);
 			goto out;
 		}
 	}
@@ -1152,8 +1152,8 @@ void ip_mc_inc_group(struct in_device *in_dev, u32 addr)
 	im->sfmode = MCAST_EXCLUDE;
 	im->sfcount[MCAST_INCLUDE] = 0;
 	im->sfcount[MCAST_EXCLUDE] = 1;
-	im->sources = 0;
-	im->tomb = 0;
+	im->sources = NULL;
+	im->tomb = NULL;
 	im->crcount = 0;
 	atomic_set(&im->refcnt, 1);
 	spin_lock_init(&im->lock);
@@ -1238,7 +1238,7 @@ void ip_mc_init_dev(struct in_device *in_dev)
 {
 	ASSERT_RTNL();
 
-	in_dev->mc_tomb = 0;
+	in_dev->mc_tomb = NULL;
 #ifdef CONFIG_IP_MULTICAST
 	in_dev->mr_gq_running = 0;
 	init_timer(&in_dev->mr_gq_timer);
@@ -1339,7 +1339,7 @@ static int ip_mc_del1_src(struct ip_mc_list *pmc, int sfmode,
 	struct ip_sf_list *psf, *psf_prev;
 	int rv = 0;
 
-	psf_prev = 0;
+	psf_prev = NULL;
 	for (psf=pmc->sources; psf; psf=psf->sf_next) {
 		if (psf->sf_inaddr == *psfsrc)
 			break;
@@ -1453,7 +1453,7 @@ static int ip_mc_add1_src(struct ip_mc_list *pmc, int sfmode,
 {
 	struct ip_sf_list *psf, *psf_prev;
 
-	psf_prev = 0;
+	psf_prev = NULL;
 	for (psf=pmc->sources; psf; psf=psf->sf_next) {
 		if (psf->sf_inaddr == *psfsrc)
 			break;
@@ -1594,12 +1594,12 @@ static void ip_mc_clear_src(struct ip_mc_list *pmc)
 		nextpsf = psf->sf_next;
 		kfree(psf);
 	}
-	pmc->tomb = 0;
+	pmc->tomb = NULL;
 	for (psf=pmc->sources; psf; psf=nextpsf) {
 		nextpsf = psf->sf_next;
 		kfree(psf);
 	}
-	pmc->sources = 0;
+	pmc->sources = NULL;
 	pmc->sfmode = MCAST_EXCLUDE;
 	pmc->sfcount[MCAST_EXCLUDE] = 0;
 	pmc->sfcount[MCAST_EXCLUDE] = 1;
@@ -1673,13 +1673,13 @@ int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml,
 	if (iml->sflist == 0) {
 		/* any-source empty exclude case */
 		return ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
-			iml->sfmode, 0, 0, 0);
+			iml->sfmode, 0, NULL, 0);
 	}
 	err = ip_mc_del_src(in_dev, &iml->multi.imr_multiaddr.s_addr,
 			iml->sfmode, iml->sflist->sl_count,
 			iml->sflist->sl_addr, 0);
 	sock_kfree_s(sk, iml->sflist, IP_SFLSIZE(iml->sflist->sl_max));
-	iml->sflist = 0;
+	iml->sflist = NULL;
 	return err;
 }
 
@@ -1731,7 +1731,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
 	struct ip_mreqn imr;
 	u32 addr = mreqs->imr_multiaddr;
 	struct ip_mc_socklist *pmc;
-	struct in_device *in_dev = 0;
+	struct in_device *in_dev = NULL;
 	struct inet_opt *inet = inet_sk(sk);
 	struct ip_sf_socklist *psl;
 	int i, j, rv;
@@ -1764,9 +1764,9 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
 			goto done;
 	} else if (pmc->sfmode != omode) {
 		/* allow mode switches for empty-set filters */
-		ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, 0, 0);
+		ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 0, NULL, 0);
 		ip_mc_del_src(in_dev, &mreqs->imr_multiaddr, pmc->sfmode, 0, 
-			0, 0);
+			NULL, 0);
 		pmc->sfmode = omode;
 	}
 
@@ -1896,7 +1896,7 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
 			goto done;
 		}
 	} else
-		newpsl = 0;
+		newpsl = NULL;
 	psl = pmc->sflist;
 	if (psl) {
 		(void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
@@ -1904,7 +1904,7 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
 		sock_kfree_s(sk, psl, IP_SFLSIZE(psl->sl_max));
 	} else
 		(void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
-			0, 0, 0);
+			0, NULL, 0);
 	pmc->sflist = newpsl;
 	pmc->sfmode = msf->imsf_fmode;
 done:

net/ipv4/ip_output.c

@@ -512,7 +512,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
 		err = 0;
 		offset = 0;
 		frag = skb_shinfo(skb)->frag_list;
-		skb_shinfo(skb)->frag_list = 0;
+		skb_shinfo(skb)->frag_list = NULL;
 		skb->data_len = first_len - skb_headlen(skb);
 		skb->len = first_len;
 		iph->tot_len = htons(first_len);

net/ipv4/ip_sockglue.c

@@ -775,8 +775,8 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
 			extern int sysctl_optmem_max;
 			extern int sysctl_igmp_max_msf;
 			struct sockaddr_in *psin;
-			struct ip_msfilter *msf = 0;
-			struct group_filter *gsf = 0;
+			struct ip_msfilter *msf = NULL;
+			struct group_filter *gsf = NULL;
 			int msize, i, ifindex;
 
 			if (optlen < GROUP_FILTER_SIZE(0))
@@ -829,7 +829,7 @@ int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
 				msf->imsf_slist[i] = psin->sin_addr.s_addr;
 			}
 			kfree(gsf);
-			gsf = 0;
+			gsf = NULL;
 
 			err = ip_mc_msfilter(sk, msf, ifindex);
 mc_msf_out:

net/sunrpc/pmap_clnt.c

@@ -58,7 +58,7 @@ rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
 
 	spin_lock(&pmap_lock);
 	if (map->pm_binding) {
-		rpc_sleep_on(&map->pm_bindwait, task, NULL, 0);
+		rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL);
 		spin_unlock(&pmap_lock);
 		return;
 	}

net/sunrpc/svcsock.c

@@ -1016,7 +1016,7 @@ svc_tcp_recvfrom(struct svc_rqst *rqstp)
 		rqstp->rq_arg.page_len = len - rqstp->rq_arg.head[0].iov_len;
 	}
 
-	rqstp->rq_skbuff      = 0;
+	rqstp->rq_skbuff      = NULL;
 	rqstp->rq_prot	      = IPPROTO_TCP;
 
 	/* Reset TCP read info */