4 files changed, 32 insertions, 17 deletions

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 6e747065c202..80769f1f9fab 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -661,13 +661,13 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
 #endif
 #endif
 
-#ifdef CONFIG_FDDI
+#if defined(CONFIG_FDDI) || defined(CONFIG_FDDI_MODULE)
         case ARPHRD_FDDI:
                 arp->ar_hrd = htons(ARPHRD_ETHER);
                 arp->ar_pro = htons(ETH_P_IP);
                 break;
 #endif
-#ifdef CONFIG_TR
+#if defined(CONFIG_TR) || defined(CONFIG_TR_MODULE)
         case ARPHRD_IEEE802_TR:
                 arp->ar_hrd = htons(ARPHRD_IEEE802);
                 arp->ar_pro = htons(ETH_P_IP);
@@ -1051,7 +1051,7 @@ static int arp_req_set(struct net *net, struct arpreq *r,
                         return -EINVAL;
         }
         switch (dev->type) {
-#ifdef CONFIG_FDDI
+#if defined(CONFIG_FDDI) || defined(CONFIG_FDDI_MODULE)
         case ARPHRD_FDDI:
                 /*
                  * According to RFC 1390, FDDI devices should accept ARP
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 9d4f6d1340a4..ec19a890c9a0 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -754,7 +754,8 @@ ipmr_cache_unresolved(struct net *net, vifi_t vifi, struct sk_buff *skb)
                 c->next = mfc_unres_queue;
                 mfc_unres_queue = c;
 
-                mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires);
+                if (atomic_read(&net->ipv4.cache_resolve_queue_len) == 1)
+                        mod_timer(&ipmr_expire_timer, c->mfc_un.unres.expires);
         }
 
         /*
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 0f8caf64caa3..296150b2a62f 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2839,7 +2839,6 @@ static void __tcp_free_md5sig_pool(struct tcp_md5sig_pool * __percpu *pool)
                         if (p->md5_desc.tfm)
                                 crypto_free_hash(p->md5_desc.tfm);
                         kfree(p);
-                        p = NULL;
                 }
         }
         free_percpu(pool);
@@ -2937,25 +2936,40 @@ retry:
 
 EXPORT_SYMBOL(tcp_alloc_md5sig_pool);
 
-struct tcp_md5sig_pool *__tcp_get_md5sig_pool(int cpu)
+
+/**
+ *      tcp_get_md5sig_pool - get md5sig_pool for this user
+ *
+ *      We use percpu structure, so if we succeed, we exit with preemption
+ *      and BH disabled, to make sure another thread or softirq handling
+ *      wont try to get same context.
+ */
+struct tcp_md5sig_pool *tcp_get_md5sig_pool(void)
 {
         struct tcp_md5sig_pool * __percpu *p;
-        spin_lock_bh(&tcp_md5sig_pool_lock);
+
+        local_bh_disable();
+
+        spin_lock(&tcp_md5sig_pool_lock);
         p = tcp_md5sig_pool;
         if (p)
                 tcp_md5sig_users++;
-        spin_unlock_bh(&tcp_md5sig_pool_lock);
-        return (p ? *per_cpu_ptr(p, cpu) : NULL);
-}
+        spin_unlock(&tcp_md5sig_pool_lock);
+
+        if (p)
+                return *per_cpu_ptr(p, smp_processor_id());
 
-EXPORT_SYMBOL(__tcp_get_md5sig_pool);
+        local_bh_enable();
+        return NULL;
+}
+EXPORT_SYMBOL(tcp_get_md5sig_pool);
 
-void __tcp_put_md5sig_pool(void)
+void tcp_put_md5sig_pool(void)
 {
+        local_bh_enable();
         tcp_free_md5sig_pool();
 }
-
-EXPORT_SYMBOL(__tcp_put_md5sig_pool);
+EXPORT_SYMBOL(tcp_put_md5sig_pool);
 
 int tcp_md5_hash_header(struct tcp_md5sig_pool *hp,
                         struct tcphdr *th)
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 8fef859db35d..c36522a0f113 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1527,6 +1527,9 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 
         uh   = udp_hdr(skb);
         ulen = ntohs(uh->len);
+        saddr = ip_hdr(skb)->saddr;
+        daddr = ip_hdr(skb)->daddr;
+
         if (ulen > skb->len)
                 goto short_packet;
 
@@ -1540,9 +1543,6 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
         if (udp4_csum_init(skb, uh, proto))
                 goto csum_error;
 
-        saddr = ip_hdr(skb)->saddr;
-        daddr = ip_hdr(skb)->daddr;
-
         if (rt->rt_flags & (RTCF_BROADCAST|RTCF_MULTICAST))
                 return __udp4_lib_mcast_deliver(net, skb, uh,
                                 saddr, daddr, udptable);