--- zzzz-none-000/linux-2.6.39.4/net/ipv6/reassembly.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-arm-6490-729/linux-2.6.39.4/net/ipv6/reassembly.c	2021-11-10 13:23:11.000000000 +0000
@@ -239,7 +239,7 @@
 	hash = inet6_hash_frag(id, src, dst, ip6_frags.rnd);
 
 	q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);
-	if (q == NULL)
+	if (!q)
 		return NULL;
 
 	return container_of(q, struct frag_queue, q);
@@ -328,7 +328,7 @@
 		goto found;
 	}
 	prev = NULL;
-	for(next = fq->q.fragments; next != NULL; next = next->next) {
+	for (next = fq->q.fragments; next; next = next->next) {
 		if (FRAG6_CB(next)->offset >= offset)
 			break;	/* bingo! */
 		prev = next;
@@ -437,7 +437,7 @@
 		fq->q.fragments = head;
 	}
 
-	WARN_ON(head == NULL);
+	WARN_ON(!head);
 	WARN_ON(FRAG6_CB(head)->offset != 0);
 
 	/* Unfragmented part is taken from the first segment. */
@@ -458,7 +458,8 @@
 		struct sk_buff *clone;
 		int i, plen = 0;
 
-		if ((clone = alloc_skb(0, GFP_ATOMIC)) == NULL)
+		clone = alloc_skb(0, GFP_ATOMIC);
+		if (!clone)
 			goto out_oom;
 		clone->next = head->next;
 		head->next = clone;
@@ -565,7 +566,7 @@
 		ip6_evictor(net, ip6_dst_idev(skb_dst(skb)));
 
 	fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr);
-	if (fq != NULL) {
+	if (fq) {
 		int ret;
 
 		spin_lock(&fq->q.lock);
@@ -638,7 +639,7 @@
 	table = ip6_frags_ns_ctl_table;
 	if (!net_eq(net, &init_net)) {
 		table = kmemdup(table, sizeof(ip6_frags_ns_ctl_table), GFP_KERNEL);
-		if (table == NULL)
+		if (!table)
 			goto err_alloc;
 
 		table[0].data = &net->ipv6.frags.high_thresh;
@@ -647,7 +648,7 @@
 	}
 
 	hdr = register_net_sysctl_table(net, net_ipv6_ctl_path, table);
-	if (hdr == NULL)
+	if (!hdr)
 		goto err_reg;
 
 	net->ipv6.sysctl.frags_hdr = hdr;
@@ -676,7 +677,7 @@
 {
 	ip6_ctl_header = register_net_sysctl_rotable(net_ipv6_ctl_path,
 			ip6_frags_ctl_table);
-	return ip6_ctl_header == NULL ? -ENOMEM : 0;
+	return !ip6_ctl_header ? -ENOMEM : 0;
 }
 
 static void ip6_frags_sysctl_unregister(void)