RDS: cleanup: remove "== NULL"s and "!= NULL"s in ptr comparisons

Favor "if (foo)" style over "if (foo != NULL)".

Signed-off-by: Andy Grover <andy.grover@oracle.com>

net/rds/af_rds.c

@@ -62,7 +62,7 @@ static int rds_release(struct socket *sock)
 	struct rds_sock *rs;
 	unsigned long flags;
 
-	if (sk == NULL)
+	if (!sk)
 		goto out;
 
 	rs = rds_sk_to_rs(sk);

net/rds/bind.c

@@ -121,7 +121,7 @@ static int rds_add_bound(struct rds_sock *rs, __be32 addr, __be16 *port)
 	do {
 		if (rover == 0)
 			rover++;
-		if (rds_bind_tree_walk(addr, cpu_to_be16(rover), rs) == NULL) {
+		if (!rds_bind_tree_walk(addr, cpu_to_be16(rover), rs)) {
 			*port = cpu_to_be16(rover);
 			ret = 0;
 			break;
@@ -184,7 +184,7 @@ int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 		goto out;
 
 	trans = rds_trans_get_preferred(sin->sin_addr.s_addr);
-	if (trans == NULL) {
+	if (!trans) {
 		ret = -EADDRNOTAVAIL;
 		rds_remove_bound(rs);
 		if (printk_ratelimit())

net/rds/cong.c

@@ -141,7 +141,7 @@ static struct rds_cong_map *rds_cong_from_addr(__be32 addr)
 	unsigned long flags;
 
 	map = kzalloc(sizeof(struct rds_cong_map), GFP_KERNEL);
-	if (map == NULL)
+	if (!map)
 		return NULL;
 
 	map->m_addr = addr;
@@ -159,7 +159,7 @@ static struct rds_cong_map *rds_cong_from_addr(__be32 addr)
 	ret = rds_cong_tree_walk(addr, map);
 	spin_unlock_irqrestore(&rds_cong_lock, flags);
 
-	if (ret == NULL) {
+	if (!ret) {
 		ret = map;
 		map = NULL;
 	}
@@ -205,7 +205,7 @@ int rds_cong_get_maps(struct rds_connection *conn)
 	conn->c_lcong = rds_cong_from_addr(conn->c_laddr);
 	conn->c_fcong = rds_cong_from_addr(conn->c_faddr);
 
-	if (conn->c_lcong == NULL || conn->c_fcong == NULL)
+	if (!(conn->c_lcong && conn->c_fcong))
 		return -ENOMEM;
 
 	return 0;

net/rds/connection.c

@@ -148,7 +148,7 @@ static struct rds_connection *__rds_conn_create(__be32 laddr, __be32 faddr,
 		goto out;
 
 	conn = kmem_cache_zalloc(rds_conn_slab, gfp);
-	if (conn == NULL) {
+	if (!conn) {
 		conn = ERR_PTR(-ENOMEM);
 		goto out;
 	}
@@ -502,7 +502,7 @@ int __init rds_conn_init(void)
 	rds_conn_slab = kmem_cache_create("rds_connection",
 					  sizeof(struct rds_connection),
 					  0, 0, NULL);
-	if (rds_conn_slab == NULL)
+	if (!rds_conn_slab)
 		return -ENOMEM;
 
 	rds_info_register_func(RDS_INFO_CONNECTIONS, rds_conn_info);

net/rds/ib_cm.c

@@ -230,7 +230,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
 	 * the rds_ibdev at all.
 	 */
 	rds_ibdev = ib_get_client_data(dev, &rds_ib_client);
-	if (rds_ibdev == NULL) {
+	if (!rds_ibdev) {
 		if (printk_ratelimit())
 			printk(KERN_NOTICE "RDS/IB: No client_data for device %s\n",
 					dev->name);
@@ -306,7 +306,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
 					   ic->i_send_ring.w_nr *
 						sizeof(struct rds_header),
 					   &ic->i_send_hdrs_dma, GFP_KERNEL);
-	if (ic->i_send_hdrs == NULL) {
+	if (!ic->i_send_hdrs) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent send failed\n");
 		goto out;
@@ -316,7 +316,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
 					   ic->i_recv_ring.w_nr *
 						sizeof(struct rds_header),
 					   &ic->i_recv_hdrs_dma, GFP_KERNEL);
-	if (ic->i_recv_hdrs == NULL) {
+	if (!ic->i_recv_hdrs) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent recv failed\n");
 		goto out;
@@ -324,14 +324,14 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
 
 	ic->i_ack = ib_dma_alloc_coherent(dev, sizeof(struct rds_header),
 				       &ic->i_ack_dma, GFP_KERNEL);
-	if (ic->i_ack == NULL) {
+	if (!ic->i_ack) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent ack failed\n");
 		goto out;
 	}
 
 	ic->i_sends = vmalloc(ic->i_send_ring.w_nr * sizeof(struct rds_ib_send_work));
-	if (ic->i_sends == NULL) {
+	if (!ic->i_sends) {
 		ret = -ENOMEM;
 		rdsdebug("send allocation failed\n");
 		goto out;
@@ -339,7 +339,7 @@ static int rds_ib_setup_qp(struct rds_connection *conn)
 	memset(ic->i_sends, 0, ic->i_send_ring.w_nr * sizeof(struct rds_ib_send_work));
 
 	ic->i_recvs = vmalloc(ic->i_recv_ring.w_nr * sizeof(struct rds_ib_recv_work));
-	if (ic->i_recvs == NULL) {
+	if (!ic->i_recvs) {
 		ret = -ENOMEM;
 		rdsdebug("recv allocation failed\n");
 		goto out;
@@ -693,7 +693,7 @@ int rds_ib_conn_alloc(struct rds_connection *conn, gfp_t gfp)
 
 	/* XXX too lazy? */
 	ic = kzalloc(sizeof(struct rds_ib_connection), GFP_KERNEL);
-	if (ic == NULL)
+	if (!ic)
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&ic->ib_node);

net/rds/ib_recv.c

@@ -53,7 +53,7 @@ static void rds_ib_frag_drop_page(struct rds_page_frag *frag)
 static void rds_ib_frag_free(struct rds_page_frag *frag)
 {
 	rdsdebug("frag %p page %p\n", frag, frag->f_page);
-	BUG_ON(frag->f_page != NULL);
+	BUG_ON(frag->f_page);
 	kmem_cache_free(rds_ib_frag_slab, frag);
 }
 
@@ -143,14 +143,14 @@ static int rds_ib_recv_refill_one(struct rds_connection *conn,
 	struct ib_sge *sge;
 	int ret = -ENOMEM;
 
-	if (recv->r_ibinc == NULL) {
+	if (!recv->r_ibinc) {
 		if (!atomic_add_unless(&rds_ib_allocation, 1, rds_ib_sysctl_max_recv_allocation)) {
 			rds_ib_stats_inc(s_ib_rx_alloc_limit);
 			goto out;
 		}
 		recv->r_ibinc = kmem_cache_alloc(rds_ib_incoming_slab,
 						 kptr_gfp);
-		if (recv->r_ibinc == NULL) {
+		if (!recv->r_ibinc) {
 			atomic_dec(&rds_ib_allocation);
 			goto out;
 		}
@@ -158,17 +158,17 @@ static int rds_ib_recv_refill_one(struct rds_connection *conn,
 		rds_inc_init(&recv->r_ibinc->ii_inc, conn, conn->c_faddr);
 	}
 
-	if (recv->r_frag == NULL) {
+	if (!recv->r_frag) {
 		recv->r_frag = kmem_cache_alloc(rds_ib_frag_slab, kptr_gfp);
-		if (recv->r_frag == NULL)
+		if (!recv->r_frag)
 			goto out;
 		INIT_LIST_HEAD(&recv->r_frag->f_item);
 		recv->r_frag->f_page = NULL;
 	}
 
-	if (ic->i_frag.f_page == NULL) {
+	if (!ic->i_frag.f_page) {
 		ic->i_frag.f_page = alloc_page(page_gfp);
-		if (ic->i_frag.f_page == NULL)
+		if (!ic->i_frag.f_page)
 			goto out;
 		ic->i_frag.f_offset = 0;
 	}
@@ -757,7 +757,7 @@ static void rds_ib_process_recv(struct rds_connection *conn,
 	 * into the inc and save the inc so we can hang upcoming fragments
 	 * off its list.
 	 */
-	if (ibinc == NULL) {
+	if (!ibinc) {
 		ibinc = recv->r_ibinc;
 		recv->r_ibinc = NULL;
 		ic->i_ibinc = ibinc;
@@ -940,13 +940,13 @@ int __init rds_ib_recv_init(void)
 	rds_ib_incoming_slab = kmem_cache_create("rds_ib_incoming",
 					sizeof(struct rds_ib_incoming),
 					0, 0, NULL);
-	if (rds_ib_incoming_slab == NULL)
+	if (!rds_ib_incoming_slab)
 		goto out;
 
 	rds_ib_frag_slab = kmem_cache_create("rds_ib_frag",
 					sizeof(struct rds_page_frag),
 					0, 0, NULL);
-	if (rds_ib_frag_slab == NULL)
+	if (!rds_ib_frag_slab)
 		kmem_cache_destroy(rds_ib_incoming_slab);
 	else
 		ret = 0;

net/rds/ib_send.c

@@ -86,7 +86,7 @@ static void rds_ib_send_unmap_rm(struct rds_ib_connection *ic,
 		     rm->m_sg, rm->m_nents,
 		     DMA_TO_DEVICE);
 
-	if (rm->m_rdma_op != NULL) {
+	if (rm->m_rdma_op) {
 		rds_ib_send_unmap_rdma(ic, rm->m_rdma_op);
 
 		/* If the user asked for a completion notification on this
@@ -525,7 +525,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm,
 	}
 
 	/* map the message the first time we see it */
-	if (ic->i_rm == NULL) {
+	if (!ic->i_rm) {
 		/*
 		printk(KERN_NOTICE "rds_ib_xmit prep msg dport=%u flags=0x%x len=%d\n",
 				be16_to_cpu(rm->m_inc.i_hdr.h_dport),

net/rds/ib_sysctl.c

@@ -135,7 +135,7 @@ void rds_ib_sysctl_exit(void)
 int __init rds_ib_sysctl_init(void)
 {
 	rds_ib_sysctl_hdr = register_sysctl_paths(rds_ib_sysctl_path, rds_ib_sysctl_table);
-	if (rds_ib_sysctl_hdr == NULL)
+	if (!rds_ib_sysctl_hdr)
 		return -ENOMEM;
 	return 0;
 }

net/rds/info.c

@@ -76,7 +76,7 @@ void rds_info_register_func(int optname, rds_info_func func)
 	BUG_ON(optname < RDS_INFO_FIRST || optname > RDS_INFO_LAST);
 
 	spin_lock(&rds_info_lock);
-	BUG_ON(rds_info_funcs[offset] != NULL);
+	BUG_ON(rds_info_funcs[offset]);
 	rds_info_funcs[offset] = func;
 	spin_unlock(&rds_info_lock);
 }
@@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(rds_info_deregister_func);
  */
 void rds_info_iter_unmap(struct rds_info_iterator *iter)
 {
-	if (iter->addr != NULL) {
+	if (iter->addr) {
 		kunmap_atomic(iter->addr, KM_USER0);
 		iter->addr = NULL;
 	}
@@ -117,7 +117,7 @@ void rds_info_copy(struct rds_info_iterator *iter, void *data,
 	unsigned long this;
 
 	while (bytes) {
-		if (iter->addr == NULL)
+		if (!iter->addr)
 			iter->addr = kmap_atomic(*iter->pages, KM_USER0);
 
 		this = min(bytes, PAGE_SIZE - iter->offset);
@@ -188,7 +188,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval,
 			>> PAGE_SHIFT;
 
 	pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
-	if (pages == NULL) {
+	if (!pages) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -206,7 +206,7 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval,
 
 call_func:
 	func = rds_info_funcs[optname - RDS_INFO_FIRST];
-	if (func == NULL) {
+	if (!func) {
 		ret = -ENOPROTOOPT;
 		goto out;
 	}
@@ -234,7 +234,7 @@ call_func:
 		ret = -EFAULT;
 
 out:
-	for (i = 0; pages != NULL && i < nr_pages; i++)
+	for (i = 0; pages && i < nr_pages; i++)
 		put_page(pages[i]);
 	kfree(pages);
 

net/rds/iw_cm.c

@@ -257,7 +257,7 @@ static int rds_iw_setup_qp(struct rds_connection *conn)
 	 * the rds_iwdev at all.
 	 */
 	rds_iwdev = ib_get_client_data(dev, &rds_iw_client);
-	if (rds_iwdev == NULL) {
+	if (!rds_iwdev) {
 		if (printk_ratelimit())
 			printk(KERN_NOTICE "RDS/IW: No client_data for device %s\n",
 					dev->name);
@@ -292,7 +292,7 @@ static int rds_iw_setup_qp(struct rds_connection *conn)
 					   ic->i_send_ring.w_nr *
 						sizeof(struct rds_header),
 					   &ic->i_send_hdrs_dma, GFP_KERNEL);
-	if (ic->i_send_hdrs == NULL) {
+	if (!ic->i_send_hdrs) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent send failed\n");
 		goto out;
@@ -302,7 +302,7 @@ static int rds_iw_setup_qp(struct rds_connection *conn)
 					   ic->i_recv_ring.w_nr *
 						sizeof(struct rds_header),
 					   &ic->i_recv_hdrs_dma, GFP_KERNEL);
-	if (ic->i_recv_hdrs == NULL) {
+	if (!ic->i_recv_hdrs) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent recv failed\n");
 		goto out;
@@ -310,14 +310,14 @@ static int rds_iw_setup_qp(struct rds_connection *conn)
 
 	ic->i_ack = ib_dma_alloc_coherent(dev, sizeof(struct rds_header),
 				       &ic->i_ack_dma, GFP_KERNEL);
-	if (ic->i_ack == NULL) {
+	if (!ic->i_ack) {
 		ret = -ENOMEM;
 		rdsdebug("ib_dma_alloc_coherent ack failed\n");
 		goto out;
 	}
 
 	ic->i_sends = vmalloc(ic->i_send_ring.w_nr * sizeof(struct rds_iw_send_work));
-	if (ic->i_sends == NULL) {
+	if (!ic->i_sends) {
 		ret = -ENOMEM;
 		rdsdebug("send allocation failed\n");
 		goto out;
@@ -325,7 +325,7 @@ static int rds_iw_setup_qp(struct rds_connection *conn)
 	rds_iw_send_init_ring(ic);
 
 	ic->i_recvs = vmalloc(ic->i_recv_ring.w_nr * sizeof(struct rds_iw_recv_work));
-	if (ic->i_recvs == NULL) {
+	if (!ic->i_recvs) {
 		ret = -ENOMEM;
 		rdsdebug("recv allocation failed\n");
 		goto out;
@@ -696,7 +696,7 @@ int rds_iw_conn_alloc(struct rds_connection *conn, gfp_t gfp)
 
 	/* XXX too lazy? */
 	ic = kzalloc(sizeof(struct rds_iw_connection), GFP_KERNEL);
-	if (ic == NULL)
+	if (!ic)
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&ic->iw_node);

net/rds/iw_recv.c

@@ -53,7 +53,7 @@ static void rds_iw_frag_drop_page(struct rds_page_frag *frag)
 static void rds_iw_frag_free(struct rds_page_frag *frag)
 {
 	rdsdebug("frag %p page %p\n", frag, frag->f_page);
-	BUG_ON(frag->f_page != NULL);
+	BUG_ON(frag->f_page);
 	kmem_cache_free(rds_iw_frag_slab, frag);
 }
 
@@ -143,14 +143,14 @@ static int rds_iw_recv_refill_one(struct rds_connection *conn,
 	struct ib_sge *sge;
 	int ret = -ENOMEM;
 
-	if (recv->r_iwinc == NULL) {
+	if (!recv->r_iwinc) {
 		if (!atomic_add_unless(&rds_iw_allocation, 1, rds_iw_sysctl_max_recv_allocation)) {
 			rds_iw_stats_inc(s_iw_rx_alloc_limit);
 			goto out;
 		}
 		recv->r_iwinc = kmem_cache_alloc(rds_iw_incoming_slab,
 						 kptr_gfp);
-		if (recv->r_iwinc == NULL) {
+		if (!recv->r_iwinc) {
 			atomic_dec(&rds_iw_allocation);
 			goto out;
 		}
@@ -158,17 +158,17 @@ static int rds_iw_recv_refill_one(struct rds_connection *conn,
 		rds_inc_init(&recv->r_iwinc->ii_inc, conn, conn->c_faddr);
 	}
 
-	if (recv->r_frag == NULL) {
+	if (!recv->r_frag) {
 		recv->r_frag = kmem_cache_alloc(rds_iw_frag_slab, kptr_gfp);
-		if (recv->r_frag == NULL)
+		if (!recv->r_frag)
 			goto out;
 		INIT_LIST_HEAD(&recv->r_frag->f_item);
 		recv->r_frag->f_page = NULL;
 	}
 
-	if (ic->i_frag.f_page == NULL) {
+	if (!ic->i_frag.f_page) {
 		ic->i_frag.f_page = alloc_page(page_gfp);
-		if (ic->i_frag.f_page == NULL)
+		if (!ic->i_frag.f_page)
 			goto out;
 		ic->i_frag.f_offset = 0;
 	}
@@ -716,7 +716,7 @@ static void rds_iw_process_recv(struct rds_connection *conn,
 	 * into the inc and save the inc so we can hang upcoming fragments
 	 * off its list.
 	 */
-	if (iwinc == NULL) {
+	if (!iwinc) {
 		iwinc = recv->r_iwinc;
 		recv->r_iwinc = NULL;
 		ic->i_iwinc = iwinc;
@@ -899,13 +899,13 @@ int __init rds_iw_recv_init(void)
 	rds_iw_incoming_slab = kmem_cache_create("rds_iw_incoming",
 					sizeof(struct rds_iw_incoming),
 					0, 0, NULL);
-	if (rds_iw_incoming_slab == NULL)
+	if (!rds_iw_incoming_slab)
 		goto out;
 
 	rds_iw_frag_slab = kmem_cache_create("rds_iw_frag",
 					sizeof(struct rds_page_frag),
 					0, 0, NULL);
-	if (rds_iw_frag_slab == NULL)
+	if (!rds_iw_frag_slab)
 		kmem_cache_destroy(rds_iw_incoming_slab);
 	else
 		ret = 0;

net/rds/iw_send.c

@@ -86,7 +86,7 @@ static void rds_iw_send_unmap_rm(struct rds_iw_connection *ic,
 		     rm->m_sg, rm->m_nents,
 		     DMA_TO_DEVICE);
 
-	if (rm->m_rdma_op != NULL) {
+	if (rm->m_rdma_op) {
 		rds_iw_send_unmap_rdma(ic, rm->m_rdma_op);
 
 		/* If the user asked for a completion notification on this
@@ -556,7 +556,7 @@ int rds_iw_xmit(struct rds_connection *conn, struct rds_message *rm,
 	}
 
 	/* map the message the first time we see it */
-	if (ic->i_rm == NULL) {
+	if (!ic->i_rm) {
 		/*
 		printk(KERN_NOTICE "rds_iw_xmit prep msg dport=%u flags=0x%x len=%d\n",
 				be16_to_cpu(rm->m_inc.i_hdr.h_dport),

net/rds/iw_sysctl.c

@@ -125,7 +125,7 @@ void rds_iw_sysctl_exit(void)
 int __init rds_iw_sysctl_init(void)
 {
 	rds_iw_sysctl_hdr = register_sysctl_paths(rds_iw_sysctl_path, rds_iw_sysctl_table);
-	if (rds_iw_sysctl_hdr == NULL)
+	if (!rds_iw_sysctl_hdr)
 		return -ENOMEM;
 	return 0;
 }

net/rds/loop.c

@@ -112,7 +112,7 @@ static int rds_loop_conn_alloc(struct rds_connection *conn, gfp_t gfp)
 	unsigned long flags;
 
 	lc = kzalloc(sizeof(struct rds_loop_connection), GFP_KERNEL);
-	if (lc == NULL)
+	if (!lc)
 		return -ENOMEM;
 
 	INIT_LIST_HEAD(&lc->loop_node);

net/rds/message.c

@@ -240,7 +240,7 @@ struct rds_message *rds_message_map_pages(unsigned long *page_addrs, unsigned in
 	unsigned int i;
 
 	rm = rds_message_alloc(ceil(total_len, PAGE_SIZE), GFP_KERNEL);
-	if (rm == NULL)
+	if (!rm)
 		return ERR_PTR(-ENOMEM);
 
 	set_bit(RDS_MSG_PAGEVEC, &rm->m_flags);
@@ -284,7 +284,7 @@ struct rds_message *rds_message_copy_from_user(struct iovec *first_iov,
 	sg_off = 0; /* Dear gcc, sg->page will be null from kzalloc. */
 
 	while (total_len) {
-		if (sg_page(sg) == NULL) {
+		if (!sg_page(sg)) {
 			ret = rds_page_remainder_alloc(sg, total_len,
 						       GFP_HIGHUSER);
 			if (ret)

net/rds/page.c

@@ -116,7 +116,7 @@ int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes,
 	/* jump straight to allocation if we're trying for a huge page */
 	if (bytes >= PAGE_SIZE) {
 		page = alloc_page(gfp);
-		if (page == NULL) {
+		if (!page) {
 			ret = -ENOMEM;
 		} else {
 			sg_set_page(scat, page, PAGE_SIZE, 0);
@@ -162,7 +162,7 @@ int rds_page_remainder_alloc(struct scatterlist *scat, unsigned long bytes,
 		rem = &per_cpu(rds_page_remainders, get_cpu());
 		local_irq_save(flags);
 
-		if (page == NULL) {
+		if (!page) {
 			ret = -ENOMEM;
 			break;
 		}

net/rds/rdma.c

@@ -189,7 +189,7 @@ static int __rds_rdma_map(struct rds_sock *rs, struct rds_get_mr_args *args,
 		goto out;
 	}
 
-	if (rs->rs_transport->get_mr == NULL) {
+	if (!rs->rs_transport->get_mr) {
 		ret = -EOPNOTSUPP;
 		goto out;
 	}
@@ -205,13 +205,13 @@ static int __rds_rdma_map(struct rds_sock *rs, struct rds_get_mr_args *args,
 
 	/* XXX clamp nr_pages to limit the size of this alloc? */
 	pages = kcalloc(nr_pages, sizeof(struct page *), GFP_KERNEL);
-	if (pages == NULL) {
+	if (!pages) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
 	mr = kzalloc(sizeof(struct rds_mr), GFP_KERNEL);
-	if (mr == NULL) {
+	if (!mr) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -244,7 +244,7 @@ static int __rds_rdma_map(struct rds_sock *rs, struct rds_get_mr_args *args,
 
 	nents = ret;
 	sg = kcalloc(nents, sizeof(*sg), GFP_KERNEL);
-	if (sg == NULL) {
+	if (!sg) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -425,7 +425,7 @@ void rds_rdma_unuse(struct rds_sock *rs, u32 r_key, int force)
 	/* May have to issue a dma_sync on this memory region.
 	 * Note we could avoid this if the operation was a RDMA READ,
 	 * but at this point we can't tell. */
-	if (mr != NULL) {
+	if (mr) {
 		if (mr->r_trans->sync_mr)
 			mr->r_trans->sync_mr(mr->r_trans_private, DMA_FROM_DEVICE);
 
@@ -511,13 +511,13 @@ static struct rds_rdma_op *rds_rdma_prepare(struct rds_sock *rs,
 	}
 
 	pages = kcalloc(max_pages, sizeof(struct page *), GFP_KERNEL);
-	if (pages == NULL) {
+	if (!pages) {
 		ret = -ENOMEM;
 		goto out;
 	}
 
 	op = kzalloc(offsetof(struct rds_rdma_op, r_sg[nr_pages]), GFP_KERNEL);
-	if (op == NULL) {
+	if (!op) {
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -643,7 +643,7 @@ int rds_cmsg_rdma_args(struct rds_sock *rs, struct rds_message *rm,
 	struct rds_rdma_op *op;
 
 	if (cmsg->cmsg_len < CMSG_LEN(sizeof(struct rds_rdma_args)) ||
-	    rm->m_rdma_op != NULL)
+	    rm->m_rdma_op)
 		return -EINVAL;
 
 	op = rds_rdma_prepare(rs, CMSG_DATA(cmsg));
@@ -681,7 +681,7 @@ int rds_cmsg_rdma_dest(struct rds_sock *rs, struct rds_message *rm,
 
 	spin_lock_irqsave(&rs->rs_rdma_lock, flags);
 	mr = rds_mr_tree_walk(&rs->rs_rdma_keys, r_key, NULL);
-	if (mr == NULL)
+	if (!mr)
 		err = -EINVAL;	/* invalid r_key */
 	else
 		atomic_inc(&mr->r_refcount);

net/rds/recv.c

@@ -210,7 +210,7 @@ void rds_recv_incoming(struct rds_connection *conn, __be32 saddr, __be32 daddr,
 	}
 
 	rs = rds_find_bound(daddr, inc->i_hdr.h_dport);
-	if (rs == NULL) {
+	if (!rs) {
 		rds_stats_inc(s_recv_drop_no_sock);
 		goto out;
 	}
@@ -251,7 +251,7 @@ static int rds_next_incoming(struct rds_sock *rs, struct rds_incoming **inc)
 {
 	unsigned long flags;
 
-	if (*inc == NULL) {
+	if (!*inc) {
 		read_lock_irqsave(&rs->rs_recv_lock, flags);
 		if (!list_empty(&rs->rs_recv_queue)) {
 			*inc = list_entry(rs->rs_recv_queue.next,

net/rds/send.c

@@ -164,7 +164,7 @@ int rds_send_xmit(struct rds_connection *conn)
 		 * offset and S/G temporaries.
 		 */
 		rm = conn->c_xmit_rm;
-		if (rm != NULL &&
+		if (rm &&
 		    conn->c_xmit_hdr_off == sizeof(struct rds_header) &&
 		    conn->c_xmit_sg == rm->m_nents) {
 			conn->c_xmit_rm = NULL;
@@ -180,8 +180,8 @@ int rds_send_xmit(struct rds_connection *conn)
 
 		/* If we're asked to send a cong map update, do so.
 		 */
-		if (rm == NULL && test_and_clear_bit(0, &conn->c_map_queued)) {
+		if (!rm && test_and_clear_bit(0, &conn->c_map_queued)) {
-			if (conn->c_trans->xmit_cong_map != NULL) {
+			if (conn->c_trans->xmit_cong_map) {
 				conn->c_map_offset = 0;
 				conn->c_map_bytes = sizeof(struct rds_header) +
 					RDS_CONG_MAP_BYTES;
@@ -204,7 +204,7 @@ int rds_send_xmit(struct rds_connection *conn)
 		 * the connction.  We can use this ref while holding the
 		 * send_sem.. rds_send_reset() is serialized with it.
 		 */
-		if (rm == NULL) {
+		if (!rm) {
 			unsigned int len;
 
 			spin_lock_irqsave(&conn->c_lock, flags);
@@ -224,7 +224,7 @@ int rds_send_xmit(struct rds_connection *conn)
 
 			spin_unlock_irqrestore(&conn->c_lock, flags);
 
-			if (rm == NULL) {
+			if (!rm) {
 				was_empty = 1;
 				break;
 			}
@@ -875,7 +875,7 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 		goto out;
 
 	if ((rm->m_rdma_cookie || rm->m_rdma_op) &&
-	    conn->c_trans->xmit_rdma == NULL) {
+	    !conn->c_trans->xmit_rdma) {
 		if (printk_ratelimit())
 			printk(KERN_NOTICE "rdma_op %p conn xmit_rdma %p\n",
 				rm->m_rdma_op, conn->c_trans->xmit_rdma);
@@ -961,7 +961,7 @@ rds_send_pong(struct rds_connection *conn, __be16 dport)
 	int ret = 0;
 
 	rm = rds_message_alloc(0, GFP_ATOMIC);
-	if (rm == NULL) {
+	if (!rm) {
 		ret = -ENOMEM;
 		goto out;
 	}

net/rds/sysctl.c

@@ -111,7 +111,7 @@ int __init rds_sysctl_init(void)
 	rds_sysctl_reconnect_min_jiffies = rds_sysctl_reconnect_min;
 
 	rds_sysctl_reg_table = register_sysctl_paths(rds_sysctl_path, rds_sysctl_rds_table);
-	if (rds_sysctl_reg_table == NULL)
+	if (!rds_sysctl_reg_table)
 		return -ENOMEM;
 	return 0;
 }

net/rds/tcp.c

@@ -200,7 +200,7 @@ static int rds_tcp_conn_alloc(struct rds_connection *conn, gfp_t gfp)
 	struct rds_tcp_connection *tc;
 
 	tc = kmem_cache_alloc(rds_tcp_conn_slab, gfp);
-	if (tc == NULL)
+	if (!tc)
 		return -ENOMEM;
 
 	tc->t_sock = NULL;
@@ -283,7 +283,7 @@ int __init rds_tcp_init(void)
 	rds_tcp_conn_slab = kmem_cache_create("rds_tcp_connection",
 					      sizeof(struct rds_tcp_connection),
 					      0, 0, NULL);
-	if (rds_tcp_conn_slab == NULL) {
+	if (!rds_tcp_conn_slab) {
 		ret = -ENOMEM;
 		goto out;
 	}

net/rds/tcp_connect.c

@@ -45,7 +45,7 @@ void rds_tcp_state_change(struct sock *sk)
 
 	read_lock(&sk->sk_callback_lock);
 	conn = sk->sk_user_data;
-	if (conn == NULL) {
+	if (!conn) {
 		state_change = sk->sk_state_change;
 		goto out;
 	}

net/rds/tcp_listen.c

@@ -116,7 +116,7 @@ void rds_tcp_listen_data_ready(struct sock *sk, int bytes)
 
 	read_lock(&sk->sk_callback_lock);
 	ready = sk->sk_user_data;
-	if (ready == NULL) { /* check for teardown race */
+	if (!ready) { /* check for teardown race */
 		ready = sk->sk_data_ready;
 		goto out;
 	}
@@ -178,7 +178,7 @@ void rds_tcp_listen_stop(void)
 	struct socket *sock = rds_tcp_listen_sock;
 	struct sock *sk;
 
-	if (sock == NULL)
+	if (!sock)
 		return;
 
 	sk = sock->sk;

net/rds/tcp_recv.c

@@ -190,10 +190,10 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
 	 * processing.
 	 */
 	while (left) {
-		if (tinc == NULL) {
+		if (!tinc) {
 			tinc = kmem_cache_alloc(rds_tcp_incoming_slab,
 					        arg->gfp);
-			if (tinc == NULL) {
+			if (!tinc) {
 				desc->error = -ENOMEM;
 				goto out;
 			}
@@ -229,7 +229,7 @@ static int rds_tcp_data_recv(read_descriptor_t *desc, struct sk_buff *skb,
 
 		if (left && tc->t_tinc_data_rem) {
 			clone = skb_clone(skb, arg->gfp);
-			if (clone == NULL) {
+			if (!clone) {
 				desc->error = -ENOMEM;
 				goto out;
 			}
@@ -326,7 +326,7 @@ void rds_tcp_data_ready(struct sock *sk, int bytes)
 
 	read_lock(&sk->sk_callback_lock);
 	conn = sk->sk_user_data;
-	if (conn == NULL) { /* check for teardown race */
+	if (!conn) { /* check for teardown race */
 		ready = sk->sk_data_ready;
 		goto out;
 	}
@@ -347,7 +347,7 @@ int __init rds_tcp_recv_init(void)
 	rds_tcp_incoming_slab = kmem_cache_create("rds_tcp_incoming",
 					sizeof(struct rds_tcp_incoming),
 					0, 0, NULL);
-	if (rds_tcp_incoming_slab == NULL)
+	if (!rds_tcp_incoming_slab)
 		return -ENOMEM;
 	return 0;
 }

net/rds/tcp_send.c

@@ -226,7 +226,7 @@ void rds_tcp_write_space(struct sock *sk)
 
 	read_lock(&sk->sk_callback_lock);
 	conn = sk->sk_user_data;
-	if (conn == NULL) {
+	if (!conn) {
 		write_space = sk->sk_write_space;
 		goto out;
 	}

net/rds/threads.c

@@ -215,7 +215,7 @@ void rds_threads_exit(void)
 int __init rds_threads_init(void)
 {
 	rds_wq = create_workqueue("krdsd");
-	if (rds_wq == NULL)
+	if (!rds_wq)
 		return -ENOMEM;
 
 	return 0;