[TIPC]: Fix simple sparse warnings

Tried to run the new tipc stack through sparse.
Following patch fixes all cases where 0 was used
as replacement of NULL.
Use NULL to document this is a pointer and to silence sparse.

This brough sparse warning count down with 127 to 24 warnings.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

21 files changed, 127 insertions, 127 deletions

diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c
index a7b04f397c12..a926cec24119 100644
--- a/net/tipc/bcast.c
+++ b/net/tipc/bcast.c
@@ -271,7 +271,7 @@ static void bclink_send_nack(struct node *n_ptr)
                 msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
                 msg_set_bcast_tag(msg, tipc_own_tag);
 
-                if (tipc_bearer_send(&bcbearer->bearer, buf, 0)) {
+                if (tipc_bearer_send(&bcbearer->bearer, buf, NULL)) {
                         bcl->stats.sent_nacks++;
                         buf_discard(buf);
                 } else {
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 64dcb0f3a8b2..e213a8e54855 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -45,10 +45,10 @@
 
 #define MAX_ADDR_STR 32
 
-static struct media *media_list = 0;
+static struct media *media_list = NULL;
 static u32 media_count = 0;
 
-struct bearer *tipc_bearers = 0;
+struct bearer *tipc_bearers = NULL;
 
 /**
  * media_name_valid - validate media name
@@ -79,7 +79,7 @@ static struct media *media_find(const char *name)
                 if (!strcmp(m_ptr->name, name))
                         return m_ptr;
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -287,7 +287,7 @@ static struct bearer *bearer_find(const char *name)
                 if (b_ptr->active && (!strcmp(b_ptr->publ.name, name)))
                         return b_ptr;
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -307,7 +307,7 @@ struct bearer *tipc_bearer_find_interface(const char *if_name)
                 if (!strcmp(b_if_name, if_name))
                         return b_ptr;
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -569,7 +569,7 @@ failed:
 
 int tipc_block_bearer(const char *name)
 {
-        struct bearer *b_ptr = 0;
+        struct bearer *b_ptr = NULL;
         struct link *l_ptr;
         struct link *temp_l_ptr;
 
@@ -666,8 +666,8 @@ int tipc_bearer_init(void)
         } else {
                 kfree(tipc_bearers);
                 kfree(media_list);
-                tipc_bearers = 0;
-                media_list = 0;
+                tipc_bearers = NULL;
+                media_list = NULL;
                 res = -ENOMEM;
         }
         write_unlock_bh(&tipc_net_lock);
@@ -691,8 +691,8 @@ void tipc_bearer_stop(void)
         }
         kfree(tipc_bearers);
         kfree(media_list);
-        tipc_bearers = 0;
-        media_list = 0;
+        tipc_bearers = NULL;
+        media_list = NULL;
         media_count = 0;
 }
 
diff --git a/net/tipc/cluster.c b/net/tipc/cluster.c
index ab974ca19371..9fe45a4837df 100644
--- a/net/tipc/cluster.c
+++ b/net/tipc/cluster.c
@@ -48,7 +48,7 @@ void tipc_cltr_multicast(struct cluster *c_ptr, struct sk_buff *buf,
                          u32 lower, u32 upper);
 struct sk_buff *tipc_cltr_prepare_routing_msg(u32 data_size, u32 dest);
 
-struct node **tipc_local_nodes = 0;
+struct node **tipc_local_nodes = NULL;
 struct node_map tipc_cltr_bcast_nodes = {0,{0,}};
 u32 tipc_highest_allowed_slave = 0;
 
@@ -61,7 +61,7 @@ struct cluster *tipc_cltr_create(u32 addr)
 
         c_ptr = (struct cluster *)kmalloc(sizeof(*c_ptr), GFP_ATOMIC);
         if (c_ptr == NULL)
-                return 0;
+                return NULL;
         memset(c_ptr, 0, sizeof(*c_ptr));
 
         c_ptr->addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
@@ -73,7 +73,7 @@ struct cluster *tipc_cltr_create(u32 addr)
         c_ptr->nodes = (struct node **)kmalloc(alloc, GFP_ATOMIC);
         if (c_ptr->nodes == NULL) {
                 kfree(c_ptr);
-                return 0;
+                return NULL;
         }
         memset(c_ptr->nodes, 0, alloc);  
         if (in_own_cluster(addr))
@@ -91,7 +91,7 @@ struct cluster *tipc_cltr_create(u32 addr)
         }
         else {
                 kfree(c_ptr);
-                c_ptr = 0;
+                c_ptr = NULL;
         }
 
         return c_ptr;
@@ -204,7 +204,7 @@ struct node *tipc_cltr_select_node(struct cluster *c_ptr, u32 selector)
 
         assert(!in_own_cluster(c_ptr->addr));
         if (!c_ptr->highest_node)
-                return 0;
+                return NULL;
 
         /* Start entry must be random */
         while (mask > c_ptr->highest_node) {
@@ -222,7 +222,7 @@ struct node *tipc_cltr_select_node(struct cluster *c_ptr, u32 selector)
                 if (tipc_node_has_active_links(c_ptr->nodes[n_num]))
                         return c_ptr->nodes[n_num];
         }
-        return 0;
+        return NULL;
 }
 
 /*
diff --git a/net/tipc/cluster.h b/net/tipc/cluster.h
index 9963642e1058..1b4cd309495a 100644
--- a/net/tipc/cluster.h
+++ b/net/tipc/cluster.h
@@ -86,7 +86,7 @@ static inline struct cluster *tipc_cltr_find(u32 addr)
 
         if (z_ptr)
                 return z_ptr->clusters[1];
-        return 0;
+        return NULL;
 }
 
 #endif
diff --git a/net/tipc/config.c b/net/tipc/config.c
index 3c8e6740e5ae..48b5de2dbe60 100644
--- a/net/tipc/config.c
+++ b/net/tipc/config.c
@@ -683,11 +683,11 @@ int tipc_cfg_init(void)
         memset(&mng, 0, sizeof(mng));
         INIT_LIST_HEAD(&mng.link_subscribers);
 
-        res = tipc_attach(&mng.user_ref, 0, 0);
+        res = tipc_attach(&mng.user_ref, NULL, NULL);
         if (res)
                 goto failed;
 
-        res = tipc_createport(mng.user_ref, 0, TIPC_CRITICAL_IMPORTANCE,
+        res = tipc_createport(mng.user_ref, NULL, TIPC_CRITICAL_IMPORTANCE,
                               NULL, NULL, NULL,
                               NULL, cfg_named_msg_event, NULL,
                               NULL, &mng.port_ref);
diff --git a/net/tipc/dbg.c b/net/tipc/dbg.c
index 4f4beefa7830..26ef95d5fe38 100644
--- a/net/tipc/dbg.c
+++ b/net/tipc/dbg.c
@@ -81,7 +81,7 @@ void tipc_printbuf_init(struct print_buf *pb, char *raw, u32 sz)
 
         pb->crs = pb->buf = raw;
         pb->size = sz;
-        pb->next = 0;
+        pb->next = NULL;
         pb->buf[0] = 0;
         pb->buf[sz-1] = ~0;
 }
@@ -216,7 +216,7 @@ void tipc_printf(struct print_buf *pb, const char *fmt, ...)
                         }
                 }
                 pb_next = pb->next;
-                pb->next = 0;
+                pb->next = NULL;
                 pb = pb_next;
         }
         spin_unlock_bh(&print_lock);
diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c
index 1f8d83b9c8b4..7a252785f727 100644
--- a/net/tipc/eth_media.c
+++ b/net/tipc/eth_media.c
@@ -169,7 +169,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr)
 
 static void disable_bearer(struct tipc_bearer *tb_ptr)
 {
-        ((struct eth_bearer *)tb_ptr->usr_handle)->bearer = 0;
+        ((struct eth_bearer *)tb_ptr->usr_handle)->bearer = NULL;
 }
 
 /**
@@ -285,7 +285,7 @@ void tipc_eth_media_stop(void)
         for (i = 0; i < MAX_ETH_BEARERS ; i++) {
                 if (eth_bearers[i].bearer) {
                         eth_bearers[i].bearer->blocked = 1;
-                        eth_bearers[i].bearer = 0;
+                        eth_bearers[i].bearer = NULL;
                 }
                 if (eth_bearers[i].dev) {
                         dev_remove_pack(&eth_bearers[i].tipc_packet_type);
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 511872afa459..bbdca3beaaf9 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -573,7 +573,7 @@ void tipc_link_wakeup_ports(struct link *l_ptr, int all)
                 if (win <= 0)
                         break;
                 list_del_init(&p_ptr->wait_list);
-                p_ptr->congested_link = 0;
+                p_ptr->congested_link = NULL;
                 assert(p_ptr->wakeup);
                 spin_lock_bh(p_ptr->publ.lock);
                 p_ptr->publ.congested = 0;
@@ -1355,7 +1355,7 @@ again:
         fragm_crs = 0;
         fragm_rest = 0;
         sect_rest = 0;
-        sect_crs = 0;
+        sect_crs = NULL;
         curr_sect = -1;
 
         /* Prepare reusable fragment header: */
@@ -1549,7 +1549,7 @@ u32 tipc_link_push_packet(struct link *l_ptr)
                         msg_dbg(buf_msg(buf), ">DEF-PROT>");
                         l_ptr->unacked_window = 0;
                         buf_discard(buf);
-                        l_ptr->proto_msg_queue = 0;
+                        l_ptr->proto_msg_queue = NULL;
                         return TIPC_OK;
                 } else {
                         msg_dbg(buf_msg(buf), "|>DEF-PROT>");
@@ -1860,7 +1860,7 @@ u32 tipc_link_defer_pkt(struct sk_buff **head,
                         struct sk_buff **tail,
                         struct sk_buff *buf)
 {
-        struct sk_buff *prev = 0;
+        struct sk_buff *prev = NULL;
         struct sk_buff *crs = *head;
         u32 seq_no = msg_seqno(buf_msg(buf));
 
@@ -1953,7 +1953,7 @@ static void link_handle_out_of_seq_msg(struct link *l_ptr,
 void tipc_link_send_proto_msg(struct link *l_ptr, u32 msg_typ, int probe_msg,
                               u32 gap, u32 tolerance, u32 priority, u32 ack_mtu)
 {
-        struct sk_buff *buf = 0;
+        struct sk_buff *buf = NULL;
         struct tipc_msg *msg = l_ptr->pmsg;
         u32 msg_size = sizeof(l_ptr->proto_msg);
 
@@ -2426,7 +2426,7 @@ static int link_recv_changeover_msg(struct link **l_ptr,
                 }
         }
 exit:
-        *buf = 0;
+        *buf = NULL;
         buf_discard(tunnel_buf);
         return 0;
 }
@@ -2586,13 +2586,13 @@ static inline void incr_timer_cnt(struct sk_buff *buf)
 int tipc_link_recv_fragment(struct sk_buff **pending, struct sk_buff **fb, 
                             struct tipc_msg **m)
 {
-        struct sk_buff *prev = 0;
+        struct sk_buff *prev = NULL;
         struct sk_buff *fbuf = *fb;
         struct tipc_msg *fragm = buf_msg(fbuf);
         struct sk_buff *pbuf = *pending;
         u32 long_msg_seq_no = msg_long_msgno(fragm);
 
-        *fb = 0;
+        *fb = NULL;
         msg_dbg(fragm,"FRG<REC<");
 
         /* Is there an incomplete message waiting for this fragment? */
@@ -2670,8 +2670,8 @@ int tipc_link_recv_fragment(struct sk_buff **pending, struct sk_buff **fb,
 
 static void link_check_defragm_bufs(struct link *l_ptr)
 {
-        struct sk_buff *prev = 0;
-        struct sk_buff *next = 0;
+        struct sk_buff *prev = NULL;
+        struct sk_buff *next = NULL;
         struct sk_buff *buf = l_ptr->defragm_buf;
 
         if (!buf)
@@ -2750,19 +2750,19 @@ static struct link *link_find_link(const char *name, struct node **node)
         struct link *l_ptr; 
 
         if (!link_name_validate(name, &link_name_parts))
-                return 0;
+                return NULL;
 
         b_ptr = tipc_bearer_find_interface(link_name_parts.if_local);
         if (!b_ptr)
-                return 0;
+                return NULL;
 
         *node = tipc_node_find(link_name_parts.addr_peer); 
         if (!*node)
-                return 0;
+                return NULL;
 
         l_ptr = (*node)->links[b_ptr->identity];
         if (!l_ptr || strcmp(l_ptr->name, name))
-                return 0;
+                return NULL;
 
         return l_ptr;
 }
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 830f90999041..953307a9df1d 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -168,8 +168,8 @@ void tipc_named_withdraw(struct publication *publ)
 void tipc_named_node_up(unsigned long node)
 {
         struct publication *publ;
-        struct distr_item *item = 0;
-        struct sk_buff *buf = 0;
+        struct distr_item *item = NULL;
+        struct sk_buff *buf = NULL;
         u32 left = 0;
         u32 rest;
         u32 max_item_buf;
@@ -200,7 +200,7 @@ void tipc_named_node_up(unsigned long node)
                             "<%u.%u.%u>\n", tipc_zone(node), 
                             tipc_cluster(node), tipc_node(node));
                         tipc_link_send(buf, node, node);
-                        buf = 0;
+                        buf = NULL;
                 }
         }
 exit:
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 3f4b23bd08f7..a865954bd95c 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -121,7 +121,7 @@ static struct publication *publ_create(u32 type, u32 lower, u32 upper,
                 (struct publication *)kmalloc(sizeof(*publ), GFP_ATOMIC);
         if (publ == NULL) {
                 warn("Memory squeeze; failed to create publication\n");
-                return 0;
+                return NULL;
         }
 
         memset(publ, 0, sizeof(*publ));
@@ -168,7 +168,7 @@ struct name_seq *tipc_nameseq_create(u32 type, struct hlist_head *seq_head)
                 warn("Memory squeeze; failed to create name sequence\n");
                 kfree(nseq);
                 kfree(sseq);
-                return 0;
+                return NULL;
         }
 
         memset(nseq, 0, sizeof(*nseq));
@@ -207,7 +207,7 @@ static inline struct sub_seq *nameseq_find_subseq(struct name_seq *nseq,
                 else
                         return &sseqs[mid];
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -263,7 +263,7 @@ struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
 
                 if ((sseq->lower != lower) || (sseq->upper != upper)) {
                         warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
-                        return 0;
+                        return NULL;
                 }
         } else {
                 u32 inspos;
@@ -278,7 +278,7 @@ struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
                 if ((inspos < nseq->first_free) &&
                     (upper >= nseq->sseqs[inspos].lower)) {
                         warn("Overlapping publ <%u,%u,%u>\n", type, lower, upper);
-                        return 0;
+                        return NULL;
                 }
 
                 /* Ensure there is space for new sub-sequence */
@@ -294,7 +294,7 @@ struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
                                 nseq->alloc *= 2;
                         } else {
                                 warn("Memory squeeze; failed to create sub-sequence\n");
-                                return 0;
+                                return NULL;
                         }
                 }
                 dbg("Have %u sseqs for type %u\n", nseq->alloc, type);
@@ -319,7 +319,7 @@ struct publication *tipc_nameseq_insert_publ(struct name_seq *nseq,
 
         publ = publ_create(type, lower, upper, scope, node, port, key);
         if (!publ)
-                return 0;
+                return NULL;
         dbg("inserting publ %x, node=%x publ->node=%x, subscr->node=%x\n",
             publ, node, publ->node, publ->subscr.node);
 
@@ -394,7 +394,7 @@ struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
                             i, &nseq->sseqs[i], nseq->sseqs[i].lower,
                             nseq->sseqs[i].upper);
                 }
-                return 0;
+                return NULL;
         }
         dbg("nameseq_remove: seq: %x, sseq %x, <%u,%u> key %u\n",
             nseq, sseq, nseq->type, inst, key);
@@ -413,7 +413,7 @@ struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
                 prev->zone_list_next = publ->zone_list_next;
                 sseq->zone_list = publ->zone_list_next;
         } else {
-                sseq->zone_list = 0;
+                sseq->zone_list = NULL;
         }
 
         if (in_own_cluster(node)) {
@@ -431,7 +431,7 @@ struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
                         prev->cluster_list_next = publ->cluster_list_next;
                         sseq->cluster_list = publ->cluster_list_next;
                 } else {
-                        sseq->cluster_list = 0;
+                        sseq->cluster_list = NULL;
                 }
         }
 
@@ -450,7 +450,7 @@ struct publication *tipc_nameseq_remove_publ(struct name_seq *nseq, u32 inst,
                         prev->node_list_next = publ->node_list_next;
                         sseq->node_list = publ->node_list_next;
                 } else {
-                        sseq->node_list = 0;
+                        sseq->node_list = NULL;
                 }
         }
         assert(!publ->node || (publ->node == node));
@@ -535,7 +535,7 @@ static struct name_seq *nametbl_find_seq(u32 type)
                 }
         }
 
-        return 0;
+        return NULL;
 };
 
 struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
@@ -547,7 +547,7 @@ struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
         if (lower > upper) {
                 warn("Failed to publish illegal <%u,%u,%u>\n",
                      type, lower, upper);
-                return 0;
+                return NULL;
         }
 
         dbg("Publishing <%u,%u,%u> from %x\n", type, lower, upper, node);
@@ -556,7 +556,7 @@ struct publication *tipc_nametbl_insert_publ(u32 type, u32 lower, u32 upper,
                 dbg("tipc_nametbl_insert_publ: created %x\n", seq);
         }
         if (!seq)
-                return 0;
+                return NULL;
 
         assert(seq->type == type);
         return tipc_nameseq_insert_publ(seq, type, lower, upper,
@@ -570,7 +570,7 @@ struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
         struct name_seq *seq = nametbl_find_seq(type);
 
         if (!seq)
-                return 0;
+                return NULL;
 
         dbg("Withdrawing <%u,%u> from %x\n", type, lower, node);
         publ = tipc_nameseq_remove_publ(seq, lower, node, ref, key);
@@ -594,7 +594,7 @@ struct publication *tipc_nametbl_remove_publ(u32 type, u32 lower,
 u32 tipc_nametbl_translate(u32 type, u32 instance, u32 *destnode)
 {
         struct sub_seq *sseq;
-        struct publication *publ = 0;
+        struct publication *publ = NULL;
         struct name_seq *seq;
         u32 ref;
 
@@ -740,12 +740,12 @@ struct publication *tipc_nametbl_publish(u32 type, u32 lower, u32 upper,
         if (table.local_publ_count >= tipc_max_publications) {
                 warn("Failed publish: max %u local publication\n", 
                      tipc_max_publications);
-                return 0;
+                return NULL;
         }
         if ((type < TIPC_RESERVED_TYPES) && !atomic_read(&rsv_publ_ok)) {
                 warn("Failed to publish reserved name <%u,%u,%u>\n",
                      type, lower, upper);
-                return 0;
+                return NULL;
         }
 
         write_lock_bh(&tipc_nametbl_lock);
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 074891ad4f09..cd0328601bba 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -116,7 +116,7 @@
 */
 
 rwlock_t tipc_net_lock = RW_LOCK_UNLOCKED;
-struct network tipc_net = { 0 };
+struct network tipc_net = { NULL };
 
 struct node *tipc_net_select_remote_node(u32 addr, u32 ref) 
 {
@@ -181,7 +181,7 @@ static void net_stop(void)
                 tipc_zone_delete(tipc_net.zones[z_num]);
         }
         kfree(tipc_net.zones);
-        tipc_net.zones = 0;
+        tipc_net.zones = NULL;
 }
 
 static void net_route_named_msg(struct sk_buff *buf)
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 6d65010e5fa1..9f23845d11b2 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -155,7 +155,7 @@ static void node_select_active_links(struct node *n_ptr)
         u32 i;
         u32 highest_prio = 0;
 
-        active[0] = active[1] = 0;
+        active[0] = active[1] = NULL;
 
         for (i = 0; i < MAX_BEARERS; i++) {
                 struct link *l_ptr = n_ptr->links[i];
@@ -240,7 +240,7 @@ struct node *tipc_node_attach_link(struct link *l_ptr)
 
                         err("Attempt to create third link to %s\n",
                             addr_string_fill(addr_string, n_ptr->addr));
-                        return 0;
+                        return NULL;
                 }
 
                 if (!n_ptr->links[bearer_id]) {
@@ -253,12 +253,12 @@ struct node *tipc_node_attach_link(struct link *l_ptr)
                     l_ptr->b_ptr->publ.name, 
                     addr_string_fill(addr_string, l_ptr->addr));
         }
-        return 0;
+        return NULL;
 }
 
 void tipc_node_detach_link(struct node *n_ptr, struct link *l_ptr)
 {
-        n_ptr->links[l_ptr->b_ptr->identity] = 0;
+        n_ptr->links[l_ptr->b_ptr->identity] = NULL;
         tipc_net.zones[tipc_zone(l_ptr->addr)]->links--;
         n_ptr->link_cnt--;
 }
@@ -424,7 +424,7 @@ static void node_lost_contact(struct node *n_ptr)
 
         /* Notify subscribers */
         list_for_each_entry_safe(ns, tns, &n_ptr->nsub, nodesub_list) {
-                ns->node = 0;
+                ns->node = NULL;
                 list_del_init(&ns->nodesub_list);
                 tipc_k_signal((Handler)ns->handle_node_down,
                               (unsigned long)ns->usr_handle);
@@ -443,7 +443,7 @@ struct node *tipc_node_select_next_hop(u32 addr, u32 selector)
         u32 router_addr;
 
         if (!tipc_addr_domain_valid(addr))
-                return 0;
+                return NULL;
 
         /* Look for direct link to destination processsor */
         n_ptr = tipc_node_find(addr);
@@ -452,7 +452,7 @@ struct node *tipc_node_select_next_hop(u32 addr, u32 selector)
 
         /* Cluster local system nodes *must* have direct links */
         if (!is_slave(addr) && in_own_cluster(addr))
-                return 0;
+                return NULL;
 
         /* Look for cluster local router with direct link to node */
         router_addr = tipc_node_select_router(n_ptr, selector);
@@ -462,7 +462,7 @@ struct node *tipc_node_select_next_hop(u32 addr, u32 selector)
         /* Slave nodes can only be accessed within own cluster via a 
            known router with direct link -- if no router was found,give up */
         if (is_slave(addr))
-                return 0;
+                return NULL;
 
         /* Inter zone/cluster -- find any direct link to remote cluster */
         addr = tipc_addr(tipc_zone(addr), tipc_cluster(addr), 0);
@@ -475,7 +475,7 @@ struct node *tipc_node_select_next_hop(u32 addr, u32 selector)
         if (router_addr) 
                 return tipc_node_select(router_addr, selector);
 
-        return 0;
+        return NULL;
 }
 
 /**
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 29f7ae6992d4..781126e084ae 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -121,7 +121,7 @@ static inline struct node *tipc_node_find(u32 addr)
                 if (c_ptr)
                         return c_ptr->nodes[tipc_node(addr)];
         }
-        return 0;
+        return NULL;
 }
 
 static inline struct node *tipc_node_select(u32 addr, u32 selector)
diff --git a/net/tipc/node_subscr.c b/net/tipc/node_subscr.c
index afeea121d8be..cff4068cc755 100644
--- a/net/tipc/node_subscr.c
+++ b/net/tipc/node_subscr.c
@@ -47,7 +47,7 @@
 void tipc_nodesub_subscribe(struct node_subscr *node_sub, u32 addr, 
                        void *usr_handle, net_ev_handler handle_down)
 {
-        node_sub->node = 0;
+        node_sub->node = NULL;
         if (addr == tipc_own_addr)
                 return;
         if (!tipc_addr_node_valid(addr)) {
diff --git a/net/tipc/port.c b/net/tipc/port.c
index 72aae52bfec1..294375cd9bda 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -54,8 +54,8 @@
 
 #define MAX_REJECT_SIZE 1024
 
-static struct sk_buff *msg_queue_head = 0;
-static struct sk_buff *msg_queue_tail = 0;
+static struct sk_buff *msg_queue_head = NULL;
+static struct sk_buff *msg_queue_tail = NULL;
 
 spinlock_t tipc_port_list_lock = SPIN_LOCK_UNLOCKED;
 static spinlock_t queue_lock = SPIN_LOCK_UNLOCKED;
@@ -258,11 +258,11 @@ u32 tipc_createport_raw(void *usr_handle,
         p_ptr->publ.usr_handle = usr_handle;
         INIT_LIST_HEAD(&p_ptr->wait_list);
         INIT_LIST_HEAD(&p_ptr->subscription.nodesub_list);
-        p_ptr->congested_link = 0;
+        p_ptr->congested_link = NULL;
         p_ptr->max_pkt = MAX_PKT_DEFAULT;
         p_ptr->dispatcher = dispatcher;
         p_ptr->wakeup = wakeup;
-        p_ptr->user_port = 0;
+        p_ptr->user_port = NULL;
         k_init_timer(&p_ptr->timer, (Handler)port_timeout, ref);
         spin_lock_bh(&tipc_port_list_lock);
         INIT_LIST_HEAD(&p_ptr->publications);
@@ -276,9 +276,9 @@ u32 tipc_createport_raw(void *usr_handle,
 int tipc_deleteport(u32 ref)
 {
         struct port *p_ptr;
-        struct sk_buff *buf = 0;
+        struct sk_buff *buf = NULL;
 
-        tipc_withdraw(ref, 0, 0);
+        tipc_withdraw(ref, 0, NULL);
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr) 
                 return -EINVAL;
@@ -329,7 +329,7 @@ void *tipc_get_handle(const u32 ref)
 
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr)
-                return 0;
+                return NULL;
         handle = p_ptr->publ.usr_handle;
         tipc_port_unlock(p_ptr);
         return handle;
@@ -475,7 +475,7 @@ int tipc_reject_msg(struct sk_buff *buf, u32 err)
 
         /* send self-abort message when rejecting on a connected port */
         if (msg_connected(msg)) {
-                struct sk_buff *abuf = 0;
+                struct sk_buff *abuf = NULL;
                 struct port *p_ptr = tipc_port_lock(msg_destport(msg));
 
                 if (p_ptr) {
@@ -510,7 +510,7 @@ int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
 static void port_timeout(unsigned long ref)
 {
         struct port *p_ptr = tipc_port_lock(ref);
-        struct sk_buff *buf = 0;
+        struct sk_buff *buf = NULL;
 
         if (!p_ptr || !p_ptr->publ.connected)
                 return;
@@ -540,7 +540,7 @@ static void port_timeout(unsigned long ref)
 static void port_handle_node_down(unsigned long ref)
 {
         struct port *p_ptr = tipc_port_lock(ref);
-        struct sk_buff* buf = 0;
+        struct sk_buff* buf = NULL;
 
         if (!p_ptr)
                 return;
@@ -555,7 +555,7 @@ static struct sk_buff *port_build_self_abort_msg(struct port *p_ptr, u32 err)
         u32 imp = msg_importance(&p_ptr->publ.phdr);
 
         if (!p_ptr->publ.connected)
-                return 0;
+                return NULL;
         if (imp < TIPC_CRITICAL_IMPORTANCE)
                 imp++;
         return port_build_proto_msg(p_ptr->publ.ref,
@@ -575,7 +575,7 @@ static struct sk_buff *port_build_peer_abort_msg(struct port *p_ptr, u32 err)
         u32 imp = msg_importance(&p_ptr->publ.phdr);
 
         if (!p_ptr->publ.connected)
-                return 0;
+                return NULL;
         if (imp < TIPC_CRITICAL_IMPORTANCE)
                 imp++;
         return port_build_proto_msg(port_peerport(p_ptr),
@@ -594,8 +594,8 @@ void tipc_port_recv_proto_msg(struct sk_buff *buf)
         struct tipc_msg *msg = buf_msg(buf);
         struct port *p_ptr = tipc_port_lock(msg_destport(msg));
         u32 err = TIPC_OK;
-        struct sk_buff *r_buf = 0;
-        struct sk_buff *abort_buf = 0;
+        struct sk_buff *r_buf = NULL;
+        struct sk_buff *abort_buf = NULL;
 
         msg_dbg(msg, "PORT<RECV<:");
 
@@ -804,7 +804,7 @@ static void port_dispatcher_sigh(void *dummy)
 
         spin_lock_bh(&queue_lock);
         buf = msg_queue_head;
-        msg_queue_head = 0;
+        msg_queue_head = NULL;
         spin_unlock_bh(&queue_lock);
 
         while (buf) {
@@ -991,8 +991,8 @@ static void port_wakeup_sh(unsigned long ref)
 {
         struct port *p_ptr;
         struct user_port *up_ptr;
-        tipc_continue_event cb = 0;
-        void *uh = 0;
+        tipc_continue_event cb = NULL;
+        void *uh = NULL;
 
         p_ptr = tipc_port_lock(ref);
         if (p_ptr) {
@@ -1016,7 +1016,7 @@ static void port_wakeup(struct tipc_port *p_ptr)
 void tipc_acknowledge(u32 ref, u32 ack)
 {
         struct port *p_ptr;
-        struct sk_buff *buf = 0;
+        struct sk_buff *buf = NULL;
 
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr)
@@ -1062,7 +1062,7 @@ int tipc_createport(u32 user_ref,
         if (up_ptr == NULL) {
                 return -ENOMEM;
         }
-        ref = tipc_createport_raw(0, port_dispatcher, port_wakeup, importance);
+        ref = tipc_createport_raw(NULL, port_dispatcher, port_wakeup, importance);
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr) {
                 kfree(up_ptr);
@@ -1273,7 +1273,7 @@ int tipc_disconnect(u32 ref)
 int tipc_shutdown(u32 ref)
 {
         struct port *p_ptr;
-        struct sk_buff *buf = 0;
+        struct sk_buff *buf = NULL;
 
         p_ptr = tipc_port_lock(ref);
         if (!p_ptr)
diff --git a/net/tipc/ref.c b/net/tipc/ref.c
index 5a13c2defe4a..33bbf5095094 100644
--- a/net/tipc/ref.c
+++ b/net/tipc/ref.c
@@ -61,7 +61,7 @@
  * because entry 0's reference field has the form XXXX|1--1.
  */
 
-struct ref_table tipc_ref_table = { 0 };
+struct ref_table tipc_ref_table = { NULL };
 
 static rwlock_t ref_table_lock = RW_LOCK_UNLOCKED;
 
@@ -86,7 +86,7 @@ int tipc_ref_table_init(u32 requested_size, u32 start)
         write_lock_bh(&ref_table_lock);
         index_mask = sz - 1;
         for (i = sz - 1; i >= 0; i--) {
-                table[i].object = 0;
+                table[i].object = NULL;
                 table[i].lock = SPIN_LOCK_UNLOCKED;
                 table[i].data.next_plus_upper = (start & ~index_mask) + i - 1;
         }
@@ -108,7 +108,7 @@ void tipc_ref_table_stop(void)
                 return;
 
         vfree(tipc_ref_table.entries);
-        tipc_ref_table.entries = 0;
+        tipc_ref_table.entries = NULL;
 }
 
 /**
@@ -173,7 +173,7 @@ void tipc_ref_discard(u32 ref)
         assert(entry->data.reference == ref);
 
         /* mark entry as unused */
-        entry->object = 0;
+        entry->object = NULL;
         if (tipc_ref_table.first_free == 0)
                 tipc_ref_table.first_free = index;
         else
diff --git a/net/tipc/ref.h b/net/tipc/ref.h
index 4f8f9f40dcac..6d20006be45b 100644
--- a/net/tipc/ref.h
+++ b/net/tipc/ref.h
@@ -92,7 +92,7 @@ static inline void *tipc_ref_lock(u32 ref)
                         return r->object;
                 spin_unlock_bh(&r->lock);
         }
-        return 0;
+        return NULL;
 }
 
 /**
@@ -125,7 +125,7 @@ static inline void *tipc_ref_deref(u32 ref)
                 if (likely(r->data.reference == ref))
                         return r->object;
         }
-        return 0;
+        return NULL;
 }
 
 #endif
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 67253bfcd702..d1347d7da147 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -178,7 +178,7 @@ static int tipc_create(struct socket *sock, int protocol)
         if (unlikely(protocol != 0))
                 return -EPROTONOSUPPORT;
 
-        ref = tipc_createport_raw(0, &dispatch, &wakeupdispatch, TIPC_LOW_IMPORTANCE);
+        ref = tipc_createport_raw(NULL, &dispatch, &wakeupdispatch, TIPC_LOW_IMPORTANCE);
         if (unlikely(!ref))
                 return -ENOMEM;
 
@@ -265,7 +265,7 @@ static int release(struct socket *sock)
                 sock_lock(tsock);
                 buf = skb_dequeue(&sk->sk_receive_queue);
                 if (!buf)
-                        tsock->p->usr_handle = 0;
+                        tsock->p->usr_handle = NULL;
                 sock_unlock(tsock);
                 if (!buf)
                         break;
@@ -319,7 +319,7 @@ static int bind(struct socket *sock, struct sockaddr *uaddr, int uaddr_len)
                 return -ERESTARTSYS;
         
         if (unlikely(!uaddr_len)) {
-                res = tipc_withdraw(tsock->p->ref, 0, 0);
+                res = tipc_withdraw(tsock->p->ref, 0, NULL);
                 goto exit;
         }
 
@@ -1226,7 +1226,7 @@ static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
 {
    struct tipc_sock *tsock = tipc_sk(sock->sk);
    struct sockaddr_tipc *dst = (struct sockaddr_tipc *)dest;
-   struct msghdr m = {0,};
+   struct msghdr m = {NULL,};
    struct sk_buff *buf;
    struct tipc_msg *msg;
    int res;
@@ -1251,7 +1251,7 @@ static int connect(struct socket *sock, struct sockaddr *dest, int destlen,
    /* Send a 'SYN-' to destination */
 
    m.msg_name = dest;
-   if ((res = send_msg(0, sock, &m, 0)) < 0) {
+   if ((res = send_msg(NULL, sock, &m, 0)) < 0) {
            sock->state = SS_DISCONNECTING;
            return res;
    }
@@ -1367,9 +1367,9 @@ static int accept(struct socket *sock, struct socket *newsock, int flags)
 
                 msg_dbg(msg,"<ACC<: ");
                 if (!msg_data_sz(msg)) {
-                        struct msghdr m = {0,};
+                        struct msghdr m = {NULL,};
 
-                        send_packet(0, newsock, &m, 0);      
+                        send_packet(NULL, newsock, &m, 0);
                         advance_queue(tsock);
                 } else {
                         sock_lock(tsock);
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 5ff38b9f3194..3ec4e2b4e750 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -381,7 +381,7 @@ static void subscr_named_msg_event(void *usr_handle,
                                    struct tipc_name_seq const *dest)
 {
         struct subscriber *subscriber;
-        struct iovec msg_sect = {0, 0};
+        struct iovec msg_sect = {NULL, 0};
         spinlock_t *subscriber_lock;
 
         dbg("subscr_named_msg_event: orig = %x own = %x,\n",
@@ -413,13 +413,13 @@ static void subscr_named_msg_event(void *usr_handle,
         tipc_createport(topsrv.user_ref,
                         (void *)(unsigned long)subscriber->ref,
                         importance,
-                        0,
-                        0,
+                        NULL,
+                        NULL,
                         subscr_conn_shutdown_event,
-                        0,
-                        0,
+                        NULL,
+                        NULL,
                         subscr_conn_msg_event,
-                        0,
+                        NULL,
                         &subscriber->port_ref);
         if (subscriber->port_ref == 0) {
                 warn("Memory squeeze; failed to create subscription port\n");
@@ -461,22 +461,22 @@ int tipc_subscr_start(void)
         INIT_LIST_HEAD(&topsrv.subscriber_list);
 
         spin_lock_bh(&topsrv.lock);
-        res = tipc_attach(&topsrv.user_ref, 0, 0);
+        res = tipc_attach(&topsrv.user_ref, NULL, NULL);
         if (res) {
                 spin_unlock_bh(&topsrv.lock);
                 return res;
         }
 
         res = tipc_createport(topsrv.user_ref,
-                              0,
+                              NULL,
                               TIPC_CRITICAL_IMPORTANCE,
-                              0,
-                              0,
-                              0,
-                              0,
+                              NULL,
+                              NULL,
+                              NULL,
+                              NULL,
                               subscr_named_msg_event,
-                              0,
-                              0,
+                              NULL,
+                              NULL,
                               &topsrv.setup_port);
         if (res)
                 goto failed;
diff --git a/net/tipc/user_reg.c b/net/tipc/user_reg.c
index 106200d76587..3f3f933976e9 100644
--- a/net/tipc/user_reg.c
+++ b/net/tipc/user_reg.c
@@ -65,7 +65,7 @@ struct tipc_user {
 #define MAX_USERID 64
 #define USER_LIST_SIZE ((MAX_USERID + 1) * sizeof(struct tipc_user))
 
-static struct tipc_user *users = 0;
+static struct tipc_user *users = NULL;
 static u32 next_free_user = MAX_USERID + 1;
 static spinlock_t reg_lock = SPIN_LOCK_UNLOCKED;
 
@@ -149,7 +149,7 @@ void tipc_reg_stop(void)
                         reg_callback(&users[id]);
         }
         kfree(users);
-        users = 0;
+        users = NULL;
 }
 
 /**
diff --git a/net/tipc/zone.c b/net/tipc/zone.c
index 7c11f7f83a21..2803e1b4f170 100644
--- a/net/tipc/zone.c
+++ b/net/tipc/zone.c
@@ -44,11 +44,11 @@
 
 struct _zone *tipc_zone_create(u32 addr)
 {
-        struct _zone *z_ptr = 0;
+        struct _zone *z_ptr = NULL;
         u32 z_num;
 
         if (!tipc_addr_domain_valid(addr))
-                return 0;
+                return NULL;
 
         z_ptr = (struct _zone *)kmalloc(sizeof(*z_ptr), GFP_ATOMIC);
         if (z_ptr != NULL) {
@@ -114,10 +114,10 @@ struct node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref
         u32 c_num;
 
         if (!z_ptr)
-                return 0;
+                return NULL;
         c_ptr = z_ptr->clusters[tipc_cluster(addr)];
         if (!c_ptr)
-                return 0;
+                return NULL;
         n_ptr = tipc_cltr_select_node(c_ptr, ref);
         if (n_ptr)
                 return n_ptr;
@@ -126,12 +126,12 @@ struct node *tipc_zone_select_remote_node(struct _zone *z_ptr, u32 addr, u32 ref
         for (c_num = 1; c_num <= tipc_max_clusters; c_num++) {
                 c_ptr = z_ptr->clusters[c_num];
                 if (!c_ptr)
-                        return 0;
+                        return NULL;
                 n_ptr = tipc_cltr_select_node(c_ptr, ref);
                 if (n_ptr)
                         return n_ptr;
         }
-        return 0;
+        return NULL;
 }
 
 u32 tipc_zone_select_router(struct _zone *z_ptr, u32 addr, u32 ref)