ar71xx: add support for 3.8

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35728 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 789 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-3.8/902-unaligned_access_hacks.patch b/target/linux/ar71xx/patches-3.8/902-unaligned_access_hacks.patch
new file mode 100644
index 000000000..5b23b11fc
--- /dev/null
+++ b/target/linux/ar71xx/patches-3.8/902-unaligned_access_hacks.patch
@@ -0,0 +1,789 @@
+--- a/arch/mips/include/asm/checksum.h
++++ b/arch/mips/include/asm/checksum.h
+@@ -104,26 +104,30 @@ static inline __sum16 ip_fast_csum(const
+ 	const unsigned int *stop = word + ihl;
+ 	unsigned int csum;
+ 	int carry;
++	unsigned int w;
+ 
+-	csum = word[0];
+-	csum += word[1];
+-	carry = (csum < word[1]);
++	csum = net_hdr_word(word++);
++
++	w = net_hdr_word(word++);
++	csum += w;
++	carry = (csum < w);
+ 	csum += carry;
+ 
+-	csum += word[2];
+-	carry = (csum < word[2]);
++	w = net_hdr_word(word++);
++	csum += w;
++	carry = (csum < w);
+ 	csum += carry;
+ 
+-	csum += word[3];
+-	carry = (csum < word[3]);
++	w = net_hdr_word(word++);
++	csum += w;
++	carry = (csum < w);
+ 	csum += carry;
+ 
+-	word += 4;
+ 	do {
+-		csum += *word;
+-		carry = (csum < *word);
++		w = net_hdr_word(word++);
++		csum += w;
++		carry = (csum < w);
+ 		csum += carry;
+-		word++;
+ 	} while (word != stop);
+ 
+ 	return csum_fold(csum);
+@@ -192,69 +196,4 @@ static inline __sum16 ip_compute_csum(co
+ 	return csum_fold(csum_partial(buff, len, 0));
+ }
+ 
+-#define _HAVE_ARCH_IPV6_CSUM
+-static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+-				          const struct in6_addr *daddr,
+-					  __u32 len, unsigned short proto,
+-					  __wsum sum)
+-{
+-	__asm__(
+-	"	.set	push		# csum_ipv6_magic\n"
+-	"	.set	noreorder	\n"
+-	"	.set	noat		\n"
+-	"	addu	%0, %5		# proto (long in network byte order)\n"
+-	"	sltu	$1, %0, %5	\n"
+-	"	addu	%0, $1		\n"
+-
+-	"	addu	%0, %6		# csum\n"
+-	"	sltu	$1, %0, %6	\n"
+-	"	lw	%1, 0(%2)	# four words source address\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 4(%2)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 8(%2)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 12(%2)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 0(%3)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 4(%3)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 8(%3)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	lw	%1, 12(%3)	\n"
+-	"	addu	%0, $1		\n"
+-	"	addu	%0, %1		\n"
+-	"	sltu	$1, %0, %1	\n"
+-
+-	"	addu	%0, $1		# Add final carry\n"
+-	"	.set	pop"
+-	: "=r" (sum), "=r" (proto)
+-	: "r" (saddr), "r" (daddr),
+-	  "0" (htonl(len)), "1" (htonl(proto)), "r" (sum));
+-
+-	return csum_fold(sum);
+-}
+-
+ #endif /* _ASM_CHECKSUM_H */
+--- a/include/uapi/linux/ip.h
++++ b/include/uapi/linux/ip.h
+@@ -102,7 +102,7 @@ struct iphdr {
+ 	__be32	saddr;
+ 	__be32	daddr;
+ 	/*The options start here. */
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ struct ip_auth_hdr {
+--- a/include/uapi/linux/ipv6.h
++++ b/include/uapi/linux/ipv6.h
+@@ -123,7 +123,7 @@ struct ipv6hdr {
+ 
+ 	struct	in6_addr	saddr;
+ 	struct	in6_addr	daddr;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ /* index values for the variables in ipv6_devconf */
+--- a/include/uapi/linux/tcp.h
++++ b/include/uapi/linux/tcp.h
+@@ -54,7 +54,7 @@ struct tcphdr {
+ 	__be16	window;
+ 	__sum16	check;
+ 	__be16	urg_ptr;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ /*
+  *	The union cast uses a gcc extension to avoid aliasing problems
+@@ -64,7 +64,7 @@ struct tcphdr {
+ union tcp_word_hdr { 
+ 	struct tcphdr hdr;
+ 	__be32 		  words[5];
+-}; 
++} __attribute__((packed, aligned(2)));
+ 
+ #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) 
+ 
+--- a/include/uapi/linux/udp.h
++++ b/include/uapi/linux/udp.h
+@@ -24,7 +24,7 @@ struct udphdr {
+ 	__be16	dest;
+ 	__be16	len;
+ 	__sum16	check;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ /* UDP socket options */
+ #define UDP_CORK	1	/* Never send partially complete segments */
+--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
++++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+@@ -39,8 +39,8 @@ static bool ipv4_pkt_to_tuple(const stru
+ 	if (ap == NULL)
+ 		return false;
+ 
+-	tuple->src.u3.ip = ap[0];
+-	tuple->dst.u3.ip = ap[1];
++	tuple->src.u3.ip = net_hdr_word(ap++);
++	tuple->dst.u3.ip = net_hdr_word(ap);
+ 
+ 	return true;
+ }
+--- a/include/uapi/linux/icmp.h
++++ b/include/uapi/linux/icmp.h
+@@ -80,7 +80,7 @@ struct icmphdr {
+ 		__be16	mtu;
+ 	} frag;
+   } un;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ /*
+--- a/net/ipv4/tcp_input.c
++++ b/net/ipv4/tcp_input.c
+@@ -3871,13 +3871,14 @@ static bool tcp_parse_aligned_timestamp(
+ {
+ 	const __be32 *ptr = (const __be32 *)(th + 1);
+ 
+-	if (*ptr == htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16)
+-			  | (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
++	if (net_hdr_word(ptr) ==
++	    htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
++	    (TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP)) {
+ 		tp->rx_opt.saw_tstamp = 1;
+ 		++ptr;
+-		tp->rx_opt.rcv_tsval = ntohl(*ptr);
++		tp->rx_opt.rcv_tsval = get_unaligned_be32(ptr);
+ 		++ptr;
+-		tp->rx_opt.rcv_tsecr = ntohl(*ptr);
++		tp->rx_opt.rcv_tsecr = get_unaligned_be32(ptr);
+ 		return true;
+ 	}
+ 	return false;
+--- a/include/uapi/linux/in6.h
++++ b/include/uapi/linux/in6.h
+@@ -36,7 +36,7 @@ struct in6_addr {
+ #define s6_addr			in6_u.u6_addr8
+ #define s6_addr16		in6_u.u6_addr16
+ #define s6_addr32		in6_u.u6_addr32
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ /* IPv6 Wildcard Address (::) and Loopback Address (::1) defined in RFC2553
+  * NOTE: Be aware the IN6ADDR_* constants and in6addr_* externals are defined
+--- a/net/ipv6/af_inet6.c
++++ b/net/ipv6/af_inet6.c
+@@ -61,6 +61,7 @@
+ #endif
+ 
+ #include <asm/uaccess.h>
++#include <asm/unaligned.h>
+ #include <linux/mroute6.h>
+ 
+ MODULE_AUTHOR("Cast of dozens");
+@@ -688,7 +689,7 @@ bool ipv6_opt_accepted(const struct sock
+ 		if ((opt->hop && (np->rxopt.bits.hopopts ||
+ 				  np->rxopt.bits.ohopopts)) ||
+ 		    ((IPV6_FLOWINFO_MASK &
+-		      *(__be32 *)skb_network_header(skb)) &&
++		      net_hdr_word(skb_network_header(skb))) &&
+ 		     np->rxopt.bits.rxflow) ||
+ 		    (opt->srcrt && (np->rxopt.bits.srcrt ||
+ 		     np->rxopt.bits.osrcrt)) ||
+--- a/net/ipv6/route.c
++++ b/net/ipv6/route.c
+@@ -994,7 +994,7 @@ void ip6_route_input(struct sk_buff *skb
+ 		.flowi6_iif = skb->dev->ifindex,
+ 		.daddr = iph->daddr,
+ 		.saddr = iph->saddr,
+-		.flowlabel = (* (__be32 *) iph) & IPV6_FLOWINFO_MASK,
++		.flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
+ 		.flowi6_mark = skb->mark,
+ 		.flowi6_proto = iph->nexthdr,
+ 	};
+@@ -1159,7 +1159,7 @@ void ip6_update_pmtu(struct sk_buff *skb
+ 	fl6.flowi6_flags = 0;
+ 	fl6.daddr = iph->daddr;
+ 	fl6.saddr = iph->saddr;
+-	fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK;
++	fl6.flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
+ 
+ 	dst = ip6_route_output(net, NULL, &fl6);
+ 	if (!dst->error)
+@@ -1187,7 +1187,7 @@ void ip6_redirect(struct sk_buff *skb, s
+ 	fl6.flowi6_flags = 0;
+ 	fl6.daddr = iph->daddr;
+ 	fl6.saddr = iph->saddr;
+-	fl6.flowlabel = (*(__be32 *) iph) & IPV6_FLOWINFO_MASK;
++	fl6.flowlabel = net_hdr_word(iph) & IPV6_FLOWINFO_MASK,
+ 
+ 	dst = ip6_route_output(net, NULL, &fl6);
+ 	if (!dst->error)
+--- a/net/ipv6/tcp_ipv6.c
++++ b/net/ipv6/tcp_ipv6.c
+@@ -64,6 +64,7 @@
+ #include <net/secure_seq.h>
+ #include <net/tcp_memcontrol.h>
+ 
++#include <asm/unaligned.h>
+ #include <asm/uaccess.h>
+ 
+ #include <linux/proc_fs.h>
+@@ -756,10 +757,10 @@ static void tcp_v6_send_response(struct
+ 	topt = (__be32 *)(t1 + 1);
+ 
+ 	if (ts) {
+-		*topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
+-				(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
+-		*topt++ = htonl(tcp_time_stamp);
+-		*topt++ = htonl(ts);
++		put_unaligned_be32((TCPOPT_NOP << 24) |	(TCPOPT_NOP << 16) |
++			(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP, topt++);
++		put_unaligned_be32(tcp_time_stamp, topt++);
++		put_unaligned_be32(ts, topt++);
+ 	}
+ 
+ #ifdef CONFIG_TCP_MD5SIG
+--- a/include/linux/ipv6.h
++++ b/include/linux/ipv6.h
+@@ -4,6 +4,7 @@
+ #include <uapi/linux/ipv6.h>
+ 
+ #define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
++
+ /*
+  * This structure contains configuration options per IPv6 link.
+  */
+--- a/net/ipv6/datagram.c
++++ b/net/ipv6/datagram.c
+@@ -360,12 +360,12 @@ int ipv6_recv_error(struct sock *sk, str
+ 				*(struct in6_addr *)(nh + serr->addr_offset);
+ 			if (np->sndflow)
+ 				sin->sin6_flowinfo =
+-					(*(__be32 *)(nh + serr->addr_offset - 24) &
+-					 IPV6_FLOWINFO_MASK);
++					net_hdr_word(nh + serr->addr_offset - 24) &
++					 IPV6_FLOWINFO_MASK;
+ 			if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
+ 				sin->sin6_scope_id = IP6CB(skb)->iif;
+ 		} else {
+-			ipv6_addr_set_v4mapped(*(__be32 *)(nh + serr->addr_offset),
++			ipv6_addr_set_v4mapped(net_hdr_word(nh + serr->addr_offset),
+ 					       &sin->sin6_addr);
+ 		}
+ 	}
+@@ -493,9 +493,10 @@ int ip6_datagram_recv_ctl(struct sock *s
+ 		put_cmsg(msg, SOL_IPV6, IPV6_TCLASS, sizeof(tclass), &tclass);
+ 	}
+ 
+-	if (np->rxopt.bits.rxflow && (*(__be32 *)nh & IPV6_FLOWINFO_MASK)) {
+-		__be32 flowinfo = *(__be32 *)nh & IPV6_FLOWINFO_MASK;
+-		put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
++	if (np->rxopt.bits.rxflow) {
++		__be32 flowinfo = net_hdr_word(nh) & IPV6_FLOWINFO_MASK;
++		if (flowinfo)
++			put_cmsg(msg, SOL_IPV6, IPV6_FLOWINFO, sizeof(flowinfo), &flowinfo);
+ 	}
+ 
+ 	/* HbH is allowed only once */
+@@ -682,12 +683,12 @@ int ip6_datagram_send_ctl(struct net *ne
+ 			}
+ 
+ 			if (fl6->flowlabel&IPV6_FLOWINFO_MASK) {
+-				if ((fl6->flowlabel^*(__be32 *)CMSG_DATA(cmsg))&~IPV6_FLOWINFO_MASK) {
++				if ((fl6->flowlabel^net_hdr_word(CMSG_DATA(cmsg)))&~IPV6_FLOWINFO_MASK) {
+ 					err = -EINVAL;
+ 					goto exit_f;
+ 				}
+ 			}
+-			fl6->flowlabel = IPV6_FLOWINFO_MASK & *(__be32 *)CMSG_DATA(cmsg);
++			fl6->flowlabel = IPV6_FLOWINFO_MASK & net_hdr_word(CMSG_DATA(cmsg));
+ 			break;
+ 
+ 		case IPV6_2292HOPOPTS:
+--- a/net/ipv6/ip6_gre.c
++++ b/net/ipv6/ip6_gre.c
+@@ -430,7 +430,7 @@ static void ip6gre_err(struct sk_buff *s
+ 
+ 	t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr,
+ 				flags & GRE_KEY ?
+-				*(((__be32 *)p) + (grehlen / 4) - 1) : 0,
++				net_hdr_word(((__be32 *)p) + (grehlen / 4) - 1) : 0,
+ 				p[1]);
+ 	if (t == NULL)
+ 		return;
+@@ -522,11 +522,11 @@ static int ip6gre_rcv(struct sk_buff *sk
+ 			offset += 4;
+ 		}
+ 		if (flags&GRE_KEY) {
+-			key = *(__be32 *)(h + offset);
++			key = net_hdr_word(h + offset);
+ 			offset += 4;
+ 		}
+ 		if (flags&GRE_SEQ) {
+-			seqno = ntohl(*(__be32 *)(h + offset));
++			seqno = ntohl(net_hdr_word(h + offset));
+ 			offset += 4;
+ 		}
+ 	}
+@@ -772,7 +772,7 @@ static netdev_tx_t ip6gre_xmit2(struct s
+ 	 *	Push down and install the IP header.
+ 	 */
+ 	ipv6h = ipv6_hdr(skb);
+-	*(__be32 *)ipv6h = fl6->flowlabel | htonl(0x60000000);
++	net_hdr_word(ipv6h) = fl6->flowlabel | htonl(0x60000000);
+ 	dsfield = INET_ECN_encapsulate(0, dsfield);
+ 	ipv6_change_dsfield(ipv6h, ~INET_ECN_MASK, dsfield);
+ 	ipv6h->hop_limit = tunnel->parms.hop_limit;
+@@ -789,7 +789,7 @@ static netdev_tx_t ip6gre_xmit2(struct s
+ 
+ 		if (tunnel->parms.o_flags&GRE_SEQ) {
+ 			++tunnel->o_seqno;
+-			*ptr = htonl(tunnel->o_seqno);
++			net_hdr_word(ptr) = htonl(tunnel->o_seqno);
+ 			ptr--;
+ 		}
+ 		if (tunnel->parms.o_flags&GRE_KEY) {
+@@ -897,9 +897,9 @@ static inline int ip6gre_xmit_ipv6(struc
+ 
+ 	dsfield = ipv6_get_dsfield(ipv6h);
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
+-		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
++		fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_TCLASS_MASK;
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
+-		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
++		fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_FLOWLABEL_MASK;
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ 		fl6.flowi6_mark = skb->mark;
+ 
+@@ -1240,7 +1240,7 @@ static int ip6gre_header(struct sk_buff
+ 	struct ipv6hdr *ipv6h = (struct ipv6hdr *)skb_push(skb, t->hlen);
+ 	__be16 *p = (__be16 *)(ipv6h+1);
+ 
+-	*(__be32 *)ipv6h = t->fl.u.ip6.flowlabel | htonl(0x60000000);
++	net_hdr_word(ipv6h) = t->fl.u.ip6.flowlabel | htonl(0x60000000);
+ 	ipv6h->hop_limit = t->parms.hop_limit;
+ 	ipv6h->nexthdr = NEXTHDR_GRE;
+ 	ipv6h->saddr = t->parms.laddr;
+--- a/net/ipv6/ip6_output.c
++++ b/net/ipv6/ip6_output.c
+@@ -216,7 +216,7 @@ int ip6_xmit(struct sock *sk, struct sk_
+ 	if (hlimit < 0)
+ 		hlimit = ip6_dst_hoplimit(dst);
+ 
+-	*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | fl6->flowlabel;
++	net_hdr_word(hdr) = htonl(0x60000000 | (tclass << 20)) | fl6->flowlabel;
+ 
+ 	hdr->payload_len = htons(seg_len);
+ 	hdr->nexthdr = proto;
+--- a/net/ipv6/ip6_tunnel.c
++++ b/net/ipv6/ip6_tunnel.c
+@@ -1136,9 +1136,9 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
+ 
+ 	dsfield = ipv6_get_dsfield(ipv6h);
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)
+-		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_TCLASS_MASK);
++		fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_TCLASS_MASK;
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FLOWLABEL)
+-		fl6.flowlabel |= (*(__be32 *) ipv6h & IPV6_FLOWLABEL_MASK);
++		fl6.flowlabel |= net_hdr_word(ipv6h) & IPV6_FLOWLABEL_MASK;
+ 	if (t->parms.flags & IP6_TNL_F_USE_ORIG_FWMARK)
+ 		fl6.flowi6_mark = skb->mark;
+ 
+--- a/net/ipv6/exthdrs.c
++++ b/net/ipv6/exthdrs.c
+@@ -578,7 +578,7 @@ static bool ipv6_hop_jumbo(struct sk_buf
+ 		goto drop;
+ 	}
+ 
+-	pkt_len = ntohl(*(__be32 *)(nh + optoff + 2));
++	pkt_len = ntohl(net_hdr_word(nh + optoff + 2));
+ 	if (pkt_len <= IPV6_MAXPLEN) {
+ 		IP6_INC_STATS_BH(net, ipv6_skb_idev(skb),
+ 				 IPSTATS_MIB_INHDRERRORS);
+--- a/include/linux/types.h
++++ b/include/linux/types.h
+@@ -212,5 +212,11 @@ struct callback_head {
+ };
+ #define rcu_head callback_head
+ 
++struct net_hdr_word {
++       u32 words[1];
++} __attribute__((packed, aligned(2)));
++
++#define net_hdr_word(_p) (((struct net_hdr_word *) (_p))->words[0])
++
+ #endif /*  __ASSEMBLY__ */
+ #endif /* _LINUX_TYPES_H */
+--- a/net/ipv4/af_inet.c
++++ b/net/ipv4/af_inet.c
+@@ -1391,8 +1391,8 @@ static struct sk_buff **inet_gro_receive
+ 	if (unlikely(ip_fast_csum((u8 *)iph, 5)))
+ 		goto out_unlock;
+ 
+-	id = ntohl(*(__be32 *)&iph->id);
+-	flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
++	id = ntohl(net_hdr_word(&iph->id));
++	flush = (u16)((ntohl(net_hdr_word(iph)) ^ skb_gro_len(skb)) | (id ^ IP_DF));
+ 	id >>= 16;
+ 
+ 	for (p = *head; p; p = p->next) {
+--- a/net/ipv4/route.c
++++ b/net/ipv4/route.c
+@@ -465,7 +465,7 @@ static struct neighbour *ipv4_neigh_look
+ 	else if (skb)
+ 		pkey = &ip_hdr(skb)->daddr;
+ 
+-	n = __ipv4_neigh_lookup(dev, *(__force u32 *)pkey);
++	n = __ipv4_neigh_lookup(dev, net_hdr_word(pkey));
+ 	if (n)
+ 		return n;
+ 	return neigh_create(&arp_tbl, pkey, dev);
+--- a/net/ipv4/tcp_output.c
++++ b/net/ipv4/tcp_output.c
+@@ -456,15 +456,17 @@ static void tcp_options_write(__be32 *pt
+ 	 */
+ 	if (unlikely(OPTION_MD5 & options)) {
+ 		if (unlikely(OPTION_COOKIE_EXTENSION & options)) {
+-			*ptr++ = htonl((TCPOPT_COOKIE << 24) |
+-				       (TCPOLEN_COOKIE_BASE << 16) |
+-				       (TCPOPT_MD5SIG << 8) |
+-				       TCPOLEN_MD5SIG);
++			net_hdr_word(ptr++) =
++				htonl((TCPOPT_COOKIE << 24) |
++				      (TCPOLEN_COOKIE_BASE << 16) |
++				      (TCPOPT_MD5SIG << 8) |
++				      TCPOLEN_MD5SIG);
+ 		} else {
+-			*ptr++ = htonl((TCPOPT_NOP << 24) |
+-				       (TCPOPT_NOP << 16) |
+-				       (TCPOPT_MD5SIG << 8) |
+-				       TCPOLEN_MD5SIG);
++			net_hdr_word(ptr++) =
++				htonl((TCPOPT_NOP << 24) |
++				      (TCPOPT_NOP << 16) |
++				      (TCPOPT_MD5SIG << 8) |
++				      TCPOLEN_MD5SIG);
+ 		}
+ 		options &= ~OPTION_COOKIE_EXTENSION;
+ 		/* overload cookie hash location */
+@@ -473,26 +475,28 @@ static void tcp_options_write(__be32 *pt
+ 	}
+ 
+ 	if (unlikely(opts->mss)) {
+-		*ptr++ = htonl((TCPOPT_MSS << 24) |
+-			       (TCPOLEN_MSS << 16) |
+-			       opts->mss);
++		net_hdr_word(ptr++) =
++			htonl((TCPOPT_MSS << 24) | (TCPOLEN_MSS << 16) |
++			      opts->mss);
+ 	}
+ 
+ 	if (likely(OPTION_TS & options)) {
+ 		if (unlikely(OPTION_SACK_ADVERTISE & options)) {
+-			*ptr++ = htonl((TCPOPT_SACK_PERM << 24) |
+-				       (TCPOLEN_SACK_PERM << 16) |
+-				       (TCPOPT_TIMESTAMP << 8) |
+-				       TCPOLEN_TIMESTAMP);
++			net_hdr_word(ptr++) =
++				htonl((TCPOPT_SACK_PERM << 24) |
++				      (TCPOLEN_SACK_PERM << 16) |
++				      (TCPOPT_TIMESTAMP << 8) |
++				      TCPOLEN_TIMESTAMP);
+ 			options &= ~OPTION_SACK_ADVERTISE;
+ 		} else {
+-			*ptr++ = htonl((TCPOPT_NOP << 24) |
+-				       (TCPOPT_NOP << 16) |
+-				       (TCPOPT_TIMESTAMP << 8) |
+-				       TCPOLEN_TIMESTAMP);
++			net_hdr_word(ptr++) =
++				htonl((TCPOPT_NOP << 24) |
++				      (TCPOPT_NOP << 16) |
++				      (TCPOPT_TIMESTAMP << 8) |
++				      TCPOLEN_TIMESTAMP);
+ 		}
+-		*ptr++ = htonl(opts->tsval);
+-		*ptr++ = htonl(opts->tsecr);
++		net_hdr_word(ptr++) = htonl(opts->tsval);
++		net_hdr_word(ptr++) = htonl(opts->tsecr);
+ 	}
+ 
+ 	/* Specification requires after timestamp, so do it now.
+@@ -512,19 +516,20 @@ static void tcp_options_write(__be32 *pt
+ 			__u8 *p = (__u8 *)ptr;
+ 
+ 			/* 16-bit multiple */
+-			*p++ = TCPOPT_COOKIE;
+-			*p++ = TCPOLEN_COOKIE_BASE + cookie_size;
+-			*p++ = *cookie_copy++;
+-			*p++ = *cookie_copy++;
++			net_hdr_word(p++) = TCPOPT_COOKIE;
++			net_hdr_word(p++) = TCPOLEN_COOKIE_BASE + cookie_size;
++			net_hdr_word(p++) = *cookie_copy++;
++			net_hdr_word(p++) = *cookie_copy++;
+ 			ptr++;
+ 			cookie_size -= 2;
+ 		} else {
+ 			/* 32-bit multiple */
+-			*ptr++ = htonl(((TCPOPT_NOP << 24) |
+-					(TCPOPT_NOP << 16) |
+-					(TCPOPT_COOKIE << 8) |
+-					TCPOLEN_COOKIE_BASE) +
+-				       cookie_size);
++			net_hdr_word(ptr++) =
++				htonl(((TCPOPT_NOP << 24) |
++				       (TCPOPT_NOP << 16) |
++				       (TCPOPT_COOKIE << 8) |
++				       TCPOLEN_COOKIE_BASE) +
++				      cookie_size);
+ 		}
+ 
+ 		if (cookie_size > 0) {
+@@ -534,17 +539,19 @@ static void tcp_options_write(__be32 *pt
+ 	}
+ 
+ 	if (unlikely(OPTION_SACK_ADVERTISE & options)) {
+-		*ptr++ = htonl((TCPOPT_NOP << 24) |
+-			       (TCPOPT_NOP << 16) |
+-			       (TCPOPT_SACK_PERM << 8) |
+-			       TCPOLEN_SACK_PERM);
++		net_hdr_word(ptr++) =
++			htonl((TCPOPT_NOP << 24) |
++			      (TCPOPT_NOP << 16) |
++			      (TCPOPT_SACK_PERM << 8) |
++			      TCPOLEN_SACK_PERM);
+ 	}
+ 
+ 	if (unlikely(OPTION_WSCALE & options)) {
+-		*ptr++ = htonl((TCPOPT_NOP << 24) |
+-			       (TCPOPT_WINDOW << 16) |
+-			       (TCPOLEN_WINDOW << 8) |
+-			       opts->ws);
++		net_hdr_word(ptr++) =
++			htonl((TCPOPT_NOP << 24) |
++			      (TCPOPT_WINDOW << 16) |
++			      (TCPOLEN_WINDOW << 8) |
++			      opts->ws);
+ 	}
+ 
+ 	if (unlikely(opts->num_sack_blocks)) {
+@@ -552,16 +559,17 @@ static void tcp_options_write(__be32 *pt
+ 			tp->duplicate_sack : tp->selective_acks;
+ 		int this_sack;
+ 
+-		*ptr++ = htonl((TCPOPT_NOP  << 24) |
+-			       (TCPOPT_NOP  << 16) |
+-			       (TCPOPT_SACK <<  8) |
+-			       (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
++		net_hdr_word(ptr++) =
++			htonl((TCPOPT_NOP << 24) |
++			      (TCPOPT_NOP << 16) |
++			      (TCPOPT_SACK << 8) |
++			      (TCPOLEN_SACK_BASE + (opts->num_sack_blocks *
+ 						     TCPOLEN_SACK_PERBLOCK)));
+ 
+ 		for (this_sack = 0; this_sack < opts->num_sack_blocks;
+ 		     ++this_sack) {
+-			*ptr++ = htonl(sp[this_sack].start_seq);
+-			*ptr++ = htonl(sp[this_sack].end_seq);
++			net_hdr_word(ptr++) = htonl(sp[this_sack].start_seq);
++			net_hdr_word(ptr++) = htonl(sp[this_sack].end_seq);
+ 		}
+ 
+ 		tp->rx_opt.dsack = 0;
+@@ -570,9 +578,10 @@ static void tcp_options_write(__be32 *pt
+ 	if (unlikely(OPTION_FAST_OPEN_COOKIE & options)) {
+ 		struct tcp_fastopen_cookie *foc = opts->fastopen_cookie;
+ 
+-		*ptr++ = htonl((TCPOPT_EXP << 24) |
+-			       ((TCPOLEN_EXP_FASTOPEN_BASE + foc->len) << 16) |
+-			       TCPOPT_FASTOPEN_MAGIC);
++		net_hdr_word(ptr++) =
++			htonl((TCPOPT_EXP << 24) |
++			      ((TCPOLEN_EXP_FASTOPEN_BASE + foc->len) << 16) |
++			      TCPOPT_FASTOPEN_MAGIC);
+ 
+ 		memcpy(ptr, foc->val, foc->len);
+ 		if ((foc->len & 3) == 2) {
+--- a/net/ipv4/igmp.c
++++ b/net/ipv4/igmp.c
+@@ -470,7 +470,7 @@ static struct sk_buff *add_grec(struct s
+ 		if (!skb)
+ 			return NULL;
+ 		psrc = (__be32 *)skb_put(skb, sizeof(__be32));
+-		*psrc = psf->sf_inaddr;
++		net_hdr_word(psrc) = psf->sf_inaddr;
+ 		scount++; stotal++;
+ 		if ((type == IGMPV3_ALLOW_NEW_SOURCES ||
+ 		     type == IGMPV3_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
+--- a/net/ipv4/ip_gre.c
++++ b/net/ipv4/ip_gre.c
+@@ -518,7 +518,7 @@ static void ipgre_err(struct sk_buff *sk
+ 		return;
+ 
+ 	if (flags & GRE_KEY)
+-		key = *(((__be32 *)p) + (grehlen / 4) - 1);
++		key = net_hdr_word(((__be32 *)p) + (grehlen / 4) - 1);
+ 
+ 	switch (type) {
+ 	default:
+--- a/include/uapi/linux/igmp.h
++++ b/include/uapi/linux/igmp.h
+@@ -32,7 +32,7 @@ struct igmphdr {
+ 	__u8 code;		/* For newer IGMP */
+ 	__sum16 csum;
+ 	__be32 group;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ /* V3 group record types [grec_type] */
+ #define IGMPV3_MODE_IS_INCLUDE		1
+@@ -48,7 +48,7 @@ struct igmpv3_grec {
+ 	__be16	grec_nsrcs;
+ 	__be32	grec_mca;
+ 	__be32	grec_src[0];
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ struct igmpv3_report {
+ 	__u8 type;
+@@ -57,7 +57,7 @@ struct igmpv3_report {
+ 	__be16 resv2;
+ 	__be16 ngrec;
+ 	struct igmpv3_grec grec[0];
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ struct igmpv3_query {
+ 	__u8 type;
+@@ -78,7 +78,7 @@ struct igmpv3_query {
+ 	__u8 qqic;
+ 	__be16 nsrcs;
+ 	__be32 srcs[0];
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ #define IGMP_HOST_MEMBERSHIP_QUERY	0x11	/* From RFC1112 */
+ #define IGMP_HOST_MEMBERSHIP_REPORT	0x12	/* Ditto */
+--- a/net/core/flow_dissector.c
++++ b/net/core/flow_dissector.c
+@@ -137,7 +137,7 @@ ipv6:
+ 		nhoff += poff;
+ 		ports = skb_header_pointer(skb, nhoff, sizeof(_ports), &_ports);
+ 		if (ports)
+-			flow->ports = *ports;
++			flow->ports = net_hdr_word(ports);
+ 	}
+ 
+ 	return true;
+--- a/include/uapi/linux/icmpv6.h
++++ b/include/uapi/linux/icmpv6.h
+@@ -76,7 +76,7 @@ struct icmp6hdr {
+ #define icmp6_addrconf_other	icmp6_dataun.u_nd_ra.other
+ #define icmp6_rt_lifetime	icmp6_dataun.u_nd_ra.rt_lifetime
+ #define icmp6_router_pref	icmp6_dataun.u_nd_ra.router_pref
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ #define ICMPV6_ROUTER_PREF_LOW		0x3
+--- a/include/net/ndisc.h
++++ b/include/net/ndisc.h
+@@ -142,10 +142,10 @@ static inline u32 ndisc_hashfn(const voi
+ {
+ 	const u32 *p32 = pkey;
+ 
+-	return (((p32[0] ^ hash32_ptr(dev)) * hash_rnd[0]) +
+-		(p32[1] * hash_rnd[1]) +
+-		(p32[2] * hash_rnd[2]) +
+-		(p32[3] * hash_rnd[3]));
++	return (((net_hdr_word(&p32[0]) ^ hash32_ptr(dev)) * hash_rnd[0]) +
++		(net_hdr_word(&p32[1]) * hash_rnd[1]) +
++		(net_hdr_word(&p32[2]) * hash_rnd[2]) +
++		(net_hdr_word(&p32[3]) * hash_rnd[3]));
+ }
+ 
+ static inline struct neighbour *__ipv6_neigh_lookup(struct neigh_table *tbl, struct net_device *dev, const void *pkey)
+--- a/net/sched/cls_u32.c
++++ b/net/sched/cls_u32.c
+@@ -142,7 +142,7 @@ next_knode:
+ 			data = skb_header_pointer(skb, toff, 4, &hdata);
+ 			if (!data)
+ 				goto out;
+-			if ((*data ^ key->val) & key->mask) {
++			if ((net_hdr_word(data) ^ key->val) & key->mask) {
+ 				n = n->next;
+ 				goto next_knode;
+ 			}
+@@ -193,8 +193,8 @@ check_terminal:
+ 						  &hdata);
+ 			if (!data)
+ 				goto out;
+-			sel = ht->divisor & u32_hash_fold(*data, &n->sel,
+-							  n->fshift);
++			sel = ht->divisor & u32_hash_fold(net_hdr_word(data),
++							  &n->sel, n->fshift);
+ 		}
+ 		if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT)))
+ 			goto next_ht;
+--- a/net/ipv6/ip6_offload.c
++++ b/net/ipv6/ip6_offload.c
+@@ -200,7 +200,7 @@ static struct sk_buff **ipv6_gro_receive
+ 			continue;
+ 
+ 		iph2 = ipv6_hdr(p);
+-		first_word = *(__be32 *)iph ^ *(__be32 *)iph2 ;
++		first_word = net_hdr_word(iph) ^ net_hdr_word(iph2);
+ 
+ 		/* All fields must match except length and Traffic Class. */
+ 		if (nlen != skb_network_header_len(p) ||