ar71xx: Add kernel 4.9 support

This add support for kernel 4.9 to the ar71xx target.
It was compile tested with the generic, NAND and mikrotik subtarget.
Multiple members of the community tested it on their boards and did not
report any major problem so far.

Especially the NAND part received some changes to adapt to the new
kernel APIs. The serial driver hack used for the Arduino Yun was not
ported because the kernel changed there a lot.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 888 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-4.9/910-unaligned_access_hacks.patch b/target/linux/ar71xx/patches-4.9/910-unaligned_access_hacks.patch
new file mode 100644
index 0000000000..21ceca156f
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.9/910-unaligned_access_hacks.patch
@@ -0,0 +1,888 @@
+--- a/arch/mips/include/asm/checksum.h
++++ b/arch/mips/include/asm/checksum.h
+@@ -134,26 +134,30 @@ 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);
+@@ -214,73 +218,6 @@ 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, __u8 proto,
+-					  __wsum sum)
+-{
+-	__wsum tmp;
+-
+-	__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" (tmp)
+-	: "r" (saddr), "r" (daddr),
+-	  "0" (htonl(len)), "r" (htonl(proto)), "r" (sum));
+-
+-	return csum_fold(sum);
+-}
+-
+ #include <asm-generic/checksum.h>
+ #endif /* CONFIG_GENERIC_CSUM */
+ 
+--- 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
+@@ -129,7 +129,7 @@ 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
+@@ -41,8 +41,8 @@ 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
+@@ -81,7 +81,7 @@ struct icmphdr {
+ 	} frag;
+ 	__u8	reserved[4];
+   } un;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ /*
+--- a/include/uapi/linux/in6.h
++++ b/include/uapi/linux/in6.h
+@@ -42,7 +42,7 @@ struct in6_addr {
+ #define s6_addr16		in6_u.u6_addr16
+ #define s6_addr32		in6_u.u6_addr32
+ #endif
+-};
++} __attribute__((packed, aligned(2)));
+ #endif /* __UAPI_DEF_IN6_ADDR */
+ 
+ #if __UAPI_DEF_SOCKADDR_IN6
+--- a/net/ipv6/tcp_ipv6.c
++++ b/net/ipv6/tcp_ipv6.c
+@@ -39,6 +39,7 @@
+ #include <linux/ipsec.h>
+ #include <linux/times.h>
+ #include <linux/slab.h>
++#include <asm/unaligned.h>
+ #include <linux/uaccess.h>
+ #include <linux/ipv6.h>
+ #include <linux/icmpv6.h>
+@@ -796,10 +797,10 @@ static void tcp_v6_send_response(const s
+ 	topt = (__be32 *)(t1 + 1);
+ 
+ 	if (tsecr) {
+-		*topt++ = htonl((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
+-				(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP);
+-		*topt++ = htonl(tsval);
+-		*topt++ = htonl(tsecr);
++		put_unaligned_be32((TCPOPT_NOP << 24) | (TCPOPT_NOP << 16) |
++				(TCPOPT_TIMESTAMP << 8) | TCPOLEN_TIMESTAMP, topt++);
++		put_unaligned_be32(tsval, topt++);
++		put_unaligned_be32(tsecr, topt++);
+ 	}
+ 
+ #ifdef CONFIG_TCP_MD5SIG
+--- a/include/linux/ipv6.h
++++ b/include/linux/ipv6.h
+@@ -5,6 +5,7 @@
+ 
+ #define ipv6_optlen(p)  (((p)->hdrlen+1) << 3)
+ #define ipv6_authlen(p) (((p)->hdrlen+2) << 2)
++
+ /*
+  * This structure contains configuration options per IPv6 link.
+  */
+--- a/net/ipv6/datagram.c
++++ b/net/ipv6/datagram.c
+@@ -471,7 +471,7 @@ int ipv6_recv_error(struct sock *sk, str
+ 				ipv6_iface_scope_id(&sin->sin6_addr,
+ 						    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);
+ 			sin->sin6_scope_id = 0;
+ 		}
+@@ -814,12 +814,12 @@ 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
+@@ -394,7 +394,7 @@ static void ip6gre_err(struct sk_buff *s
+ 		return;
+ 	ipv6h = (const struct ipv6hdr *)skb->data;
+ 	greh = (const struct gre_base_hdr *)(skb->data + offset);
+-	key = key_off ? *(__be32 *)(skb->data + key_off) : 0;
++	key = key_off ? net_hdr_word((__be32 *)(skb->data + key_off)) : 0;
+ 
+ 	t = ip6gre_tunnel_lookup(skb->dev, &ipv6h->daddr, &ipv6h->saddr,
+ 				 key, greh->protocol);
+--- a/net/ipv6/exthdrs.c
++++ b/net/ipv6/exthdrs.c
+@@ -574,7 +574,7 @@ 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(net, ipv6_skb_idev(skb),
+ 				IPSTATS_MIB_INHDRERRORS);
+--- a/include/linux/types.h
++++ b/include/linux/types.h
+@@ -231,5 +231,11 @@ typedef void (*call_rcu_func_t)(struct r
+ /* clocksource cycle base type */
+ typedef u64 cycle_t;
+ 
++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
+@@ -1318,8 +1318,8 @@ struct sk_buff **inet_gro_receive(struct
+ 	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
+@@ -458,7 +458,7 @@ 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
+@@ -448,48 +448,53 @@ static void tcp_options_write(__be32 *pt
+ 	u16 options = opts->options;	/* mungable copy */
+ 
+ 	if (unlikely(OPTION_MD5 & options)) {
+-		*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);
+ 		/* overload cookie hash location */
+ 		opts->hash_location = (__u8 *)ptr;
+ 		ptr += 4;
+ 	}
+ 
+ 	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);
+ 	}
+ 
+ 	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)) {
+@@ -497,16 +502,17 @@ 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;
+@@ -519,13 +525,14 @@ static void tcp_options_write(__be32 *pt
+ 
+ 		if (foc->exp) {
+ 			len = TCPOLEN_EXP_FASTOPEN_BASE + foc->len;
+-			*ptr = htonl((TCPOPT_EXP << 24) | (len << 16) |
++			net_hdr_word(ptr) =
++				htonl((TCPOPT_EXP << 24) | (len << 16) |
+ 				     TCPOPT_FASTOPEN_MAGIC);
+ 			p += TCPOLEN_EXP_FASTOPEN_BASE;
+ 		} else {
+ 			len = TCPOLEN_FASTOPEN_BASE + foc->len;
+-			*p++ = TCPOPT_FASTOPEN;
+-			*p++ = len;
++			net_hdr_word(p++) = TCPOPT_FASTOPEN;
++			net_hdr_word(p++) = len;
+ 		}
+ 
+ 		memcpy(p, foc->val, foc->len);
+--- a/net/ipv4/igmp.c
++++ b/net/ipv4/igmp.c
+@@ -509,7 +509,7 @@ 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/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
+@@ -84,7 +84,7 @@ __be32 __skb_flow_get_ports(const struct
+ 		ports = __skb_header_pointer(skb, thoff + poff,
+ 					     sizeof(_ports), data, hlen, &_ports);
+ 		if (ports)
+-			return *ports;
++			return (__be32)net_hdr_word(ports);
+ 	}
+ 
+ 	return 0;
+--- 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
+@@ -87,7 +87,7 @@ struct ra_msg {
+         struct icmp6hdr		icmph;
+ 	__be32			reachable_time;
+ 	__be32			retrans_timer;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ struct rd_msg {
+ 	struct icmp6hdr icmph;
+@@ -365,10 +365,10 @@ 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_noref(struct net_device *dev, const void *pkey)
+--- a/net/sched/cls_u32.c
++++ b/net/sched/cls_u32.c
+@@ -159,7 +159,7 @@ 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 = rcu_dereference_bh(n->next);
+ 				goto next_knode;
+ 			}
+@@ -212,8 +212,8 @@ 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
+@@ -220,7 +220,7 @@ static struct sk_buff **ipv6_gro_receive
+ 			continue;
+ 
+ 		iph2 = (struct ipv6hdr *)(p->data + off);
+-		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.
+ 		 * XXX skbs on the gro_list have all been parsed and pulled
+--- a/include/net/addrconf.h
++++ b/include/net/addrconf.h
+@@ -46,7 +46,7 @@ struct prefix_info {
+ 	__be32			reserved2;
+ 
+ 	struct in6_addr		prefix;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ 
+ #include <linux/netdevice.h>
+--- a/include/net/inet_ecn.h
++++ b/include/net/inet_ecn.h
+@@ -124,9 +124,9 @@ static inline int IP6_ECN_set_ce(struct
+ 	if (INET_ECN_is_not_ect(ipv6_get_dsfield(iph)))
+ 		return 0;
+ 
+-	from = *(__be32 *)iph;
++	from = net_hdr_word(iph);
+ 	to = from | htonl(INET_ECN_CE << 20);
+-	*(__be32 *)iph = to;
++	net_hdr_word(iph) = to;
+ 	if (skb->ip_summed == CHECKSUM_COMPLETE)
+ 		skb->csum = csum_add(csum_sub(skb->csum, (__force __wsum)from),
+ 				     (__force __wsum)to);
+@@ -135,7 +135,7 @@ static inline int IP6_ECN_set_ce(struct
+ 
+ static inline void IP6_ECN_clear(struct ipv6hdr *iph)
+ {
+-	*(__be32*)iph &= ~htonl(INET_ECN_MASK << 20);
++	net_hdr_word(iph) &= ~htonl(INET_ECN_MASK << 20);
+ }
+ 
+ static inline void ipv6_copy_dscp(unsigned int dscp, struct ipv6hdr *inner)
+--- a/include/net/ipv6.h
++++ b/include/net/ipv6.h
+@@ -107,7 +107,7 @@ struct frag_hdr {
+ 	__u8	reserved;
+ 	__be16	frag_off;
+ 	__be32	identification;
+-};
++} __attribute__((packed, aligned(2)));
+ 
+ #define	IP6_MF		0x0001
+ #define	IP6_OFFSET	0xFFF8
+@@ -449,8 +449,8 @@ static inline void __ipv6_addr_set_half(
+ 	}
+ #endif
+ #endif
+-	addr[0] = wh;
+-	addr[1] = wl;
++	net_hdr_word(&addr[0]) = wh;
++	net_hdr_word(&addr[1]) = wl;
+ }
+ 
+ static inline void ipv6_addr_set(struct in6_addr *addr, 
+@@ -509,6 +509,8 @@ static inline bool ipv6_prefix_equal(con
+ 	const __be32 *a1 = addr1->s6_addr32;
+ 	const __be32 *a2 = addr2->s6_addr32;
+ 	unsigned int pdw, pbi;
++	/* Used for last <32-bit fraction of prefix */
++	u32 pbia1, pbia2;
+ 
+ 	/* check complete u32 in prefix */
+ 	pdw = prefixlen >> 5;
+@@ -517,7 +519,9 @@ static inline bool ipv6_prefix_equal(con
+ 
+ 	/* check incomplete u32 in prefix */
+ 	pbi = prefixlen & 0x1f;
+-	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
++	pbia1 = net_hdr_word(&a1[pdw]);
++	pbia2 = net_hdr_word(&a2[pdw]);
++	if (pbi && ((pbia1 ^ pbia2) & htonl((0xffffffff) << (32 - pbi))))
+ 		return false;
+ 
+ 	return true;
+@@ -661,13 +665,13 @@ static inline void ipv6_addr_set_v4mappe
+  */
+ static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
+ {
+-	const __be32 *a1 = token1, *a2 = token2;
++	const struct in6_addr *a1 = token1, *a2 = token2;
+ 	int i;
+ 
+ 	addrlen >>= 2;
+ 
+ 	for (i = 0; i < addrlen; i++) {
+-		__be32 xb = a1[i] ^ a2[i];
++		__be32 xb = a1->s6_addr32[i] ^ a2->s6_addr32[i];
+ 		if (xb)
+ 			return i * 32 + 31 - __fls(ntohl(xb));
+ 	}
+@@ -836,17 +840,18 @@ static inline int ip6_default_np_autolab
+ static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
+ 				__be32 flowlabel)
+ {
+-	*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
++	net_hdr_word((__be32 *)hdr) =
++		htonl(0x60000000 | (tclass << 20)) | flowlabel;
+ }
+ 
+ static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
+ {
+-	return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
++	return net_hdr_word((__be32 *)hdr) & IPV6_FLOWINFO_MASK;
+ }
+ 
+ static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
+ {
+-	return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
++	return net_hdr_word((__be32 *)hdr) & IPV6_FLOWLABEL_MASK;
+ }
+ 
+ static inline u8 ip6_tclass(__be32 flowinfo)
+--- a/include/net/secure_seq.h
++++ b/include/net/secure_seq.h
+@@ -2,6 +2,7 @@
+ #define _NET_SECURE_SEQ
+ 
+ #include <linux/types.h>
++#include <linux/in6.h>
+ 
+ u32 secure_ipv4_port_ephemeral(__be32 saddr, __be32 daddr, __be16 dport);
+ u32 secure_ipv6_port_ephemeral(const __be32 *saddr, const __be32 *daddr,
+--- a/include/uapi/linux/in.h
++++ b/include/uapi/linux/in.h
+@@ -83,7 +83,7 @@ enum {
+ /* Internet address. */
+ struct in_addr {
+ 	__be32	s_addr;
+-};
++} __attribute__((packed, aligned(2)));
+ #endif
+ 
+ #define IP_TOS		1
+--- a/net/core/secure_seq.c
++++ b/net/core/secure_seq.c
+@@ -46,11 +46,12 @@ __u32 secure_tcpv6_sequence_number(const
+ 	u32 secret[MD5_MESSAGE_BYTES / 4];
+ 	u32 hash[MD5_DIGEST_WORDS];
+ 	u32 i;
++	const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
+ 
+ 	net_secret_init();
+ 	memcpy(hash, saddr, 16);
+ 	for (i = 0; i < 4; i++)
+-		secret[i] = net_secret[i] + (__force u32)daddr[i];
++		secret[i] = net_secret[i] + (__force u32)daddr6->s6_addr32[i];
+ 	secret[4] = net_secret[4] +
+ 		(((__force u16)sport << 16) + (__force u16)dport);
+ 	for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
+@@ -68,11 +69,12 @@ u32 secure_ipv6_port_ephemeral(const __b
+ 	u32 secret[MD5_MESSAGE_BYTES / 4];
+ 	u32 hash[MD5_DIGEST_WORDS];
+ 	u32 i;
++	const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
+ 
+ 	net_secret_init();
+ 	memcpy(hash, saddr, 16);
+ 	for (i = 0; i < 4; i++)
+-		secret[i] = net_secret[i] + (__force u32) daddr[i];
++		secret[i] = net_secret[i] + (__force u32) daddr6->s6_addr32[i];
+ 	secret[4] = net_secret[4] + (__force u32)dport;
+ 	for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
+ 		secret[i] = net_secret[i];
+@@ -146,6 +148,7 @@ EXPORT_SYMBOL(secure_dccp_sequence_numbe
+ u64 secure_dccpv6_sequence_number(__be32 *saddr, __be32 *daddr,
+ 				  __be16 sport, __be16 dport)
+ {
++	const struct in6_addr *daddr6 = (struct in6_addr *) daddr;
+ 	u32 secret[MD5_MESSAGE_BYTES / 4];
+ 	u32 hash[MD5_DIGEST_WORDS];
+ 	u64 seq;
+@@ -154,7 +157,7 @@ u64 secure_dccpv6_sequence_number(__be32
+ 	net_secret_init();
+ 	memcpy(hash, saddr, 16);
+ 	for (i = 0; i < 4; i++)
+-		secret[i] = net_secret[i] + (__force u32)daddr[i];
++		secret[i] = net_secret[i] + (__force u32)daddr6->s6_addr32[i];
+ 	secret[4] = net_secret[4] +
+ 		(((__force u16)sport << 16) + (__force u16)dport);
+ 	for (i = 5; i < MD5_MESSAGE_BYTES / 4; i++)
+--- a/net/ipv6/ip6_fib.c
++++ b/net/ipv6/ip6_fib.c
+@@ -136,7 +136,7 @@ static __be32 addr_bit_set(const void *t
+ 	 * See include/asm-generic/bitops/le.h.
+ 	 */
+ 	return (__force __be32)(1 << ((~fn_bit ^ BITOP_BE32_SWIZZLE) & 0x1f)) &
+-	       addr[fn_bit >> 5];
++	       net_hdr_word(&addr[fn_bit >> 5]);
+ }
+ 
+ static struct fib6_node *node_alloc(void)
+--- a/net/netfilter/nf_conntrack_proto_tcp.c
++++ b/net/netfilter/nf_conntrack_proto_tcp.c
+@@ -452,7 +452,7 @@ static void tcp_sack(const struct sk_buf
+ 
+ 	/* Fast path for timestamp-only option */
+ 	if (length == TCPOLEN_TSTAMP_ALIGNED
+-	    && *(__be32 *)ptr == htonl((TCPOPT_NOP << 24)
++	    && net_hdr_word(ptr) == htonl((TCPOPT_NOP << 24)
+ 				       | (TCPOPT_NOP << 16)
+ 				       | (TCPOPT_TIMESTAMP << 8)
+ 				       | TCPOLEN_TIMESTAMP))
+--- a/net/xfrm/xfrm_input.c
++++ b/net/xfrm/xfrm_input.c
+@@ -154,8 +154,8 @@ int xfrm_parse_spi(struct sk_buff *skb,
+ 	if (!pskb_may_pull(skb, hlen))
+ 		return -EINVAL;
+ 
+-	*spi = *(__be32 *)(skb_transport_header(skb) + offset);
+-	*seq = *(__be32 *)(skb_transport_header(skb) + offset_seq);
++	*spi = net_hdr_word(skb_transport_header(skb) + offset);
++	*seq = net_hdr_word(skb_transport_header(skb) + offset_seq);
+ 	return 0;
+ }
+ 
+--- a/net/ipv4/tcp_input.c
++++ b/net/ipv4/tcp_input.c
+@@ -3886,14 +3886,16 @@ 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;
+-		if (*ptr)
+-			tp->rx_opt.rcv_tsecr = ntohl(*ptr) - tp->tsoffset;
++		if (net_hdr_word(ptr))
++			tp->rx_opt.rcv_tsecr = get_unaligned_be32(ptr) -
++					       tp->tsoffset;
+ 		else
+ 			tp->rx_opt.rcv_tsecr = 0;
+ 		return true;
+--- a/include/uapi/linux/if_pppox.h
++++ b/include/uapi/linux/if_pppox.h
+@@ -50,6 +50,7 @@ struct pppoe_addr {
+  */
+ struct pptp_addr {
+ 	__u16		call_id;
++	__u16		pad;
+ 	struct in_addr	sin_addr;
+ };
+ 
+--- a/net/ipv6/netfilter/nf_log_ipv6.c
++++ b/net/ipv6/netfilter/nf_log_ipv6.c
+@@ -66,9 +66,9 @@ static void dump_ipv6_packet(struct nf_l
+ 	/* Max length: 44 "LEN=65535 TC=255 HOPLIMIT=255 FLOWLBL=FFFFF " */
+ 	nf_log_buf_add(m, "LEN=%Zu TC=%u HOPLIMIT=%u FLOWLBL=%u ",
+ 	       ntohs(ih->payload_len) + sizeof(struct ipv6hdr),
+-	       (ntohl(*(__be32 *)ih) & 0x0ff00000) >> 20,
++	       (ntohl(net_hdr_word(ih)) & 0x0ff00000) >> 20,
+ 	       ih->hop_limit,
+-	       (ntohl(*(__be32 *)ih) & 0x000fffff));
++	       (ntohl(net_hdr_word(ih)) & 0x000fffff));
+ 
+ 	fragment = 0;
+ 	ptr = ip6hoff + sizeof(struct ipv6hdr);
+--- a/include/net/neighbour.h
++++ b/include/net/neighbour.h
+@@ -263,8 +263,10 @@ static inline bool neigh_key_eq128(const
+ 	const u32 *n32 = (const u32 *)n->primary_key;
+ 	const u32 *p32 = pkey;
+ 
+-	return ((n32[0] ^ p32[0]) | (n32[1] ^ p32[1]) |
+-		(n32[2] ^ p32[2]) | (n32[3] ^ p32[3])) == 0;
++	return ((n32[0] ^ net_hdr_word(&p32[0])) |
++		(n32[1] ^ net_hdr_word(&p32[1])) |
++		(n32[2] ^ net_hdr_word(&p32[2])) |
++		(n32[3] ^ net_hdr_word(&p32[3]))) == 0;
+ }
+ 
+ static inline struct neighbour *___neigh_lookup_noref(
+--- a/include/uapi/linux/netfilter_arp/arp_tables.h
++++ b/include/uapi/linux/netfilter_arp/arp_tables.h
+@@ -69,7 +69,7 @@ struct arpt_arp {
+ 	__u8 flags;
+ 	/* Inverse flags */
+ 	__u16 invflags;
+-};
++} __attribute__((aligned(4)));
+ 
+ /* Values for "flag" field in struct arpt_ip (general arp structure).
+  * No flags defined yet.
+--- a/net/core/utils.c
++++ b/net/core/utils.c
+@@ -321,8 +321,14 @@ void inet_proto_csum_replace16(__sum16 *
+ 			       bool pseudohdr)
+ {
+ 	__be32 diff[] = {
+-		~from[0], ~from[1], ~from[2], ~from[3],
+-		to[0], to[1], to[2], to[3],
++		~net_hdr_word(&from[0]),
++		~net_hdr_word(&from[1]),
++		~net_hdr_word(&from[2]),
++		~net_hdr_word(&from[3]),
++		net_hdr_word(&to[0]),
++		net_hdr_word(&to[1]),
++		net_hdr_word(&to[2]),
++		net_hdr_word(&to[3]),
+ 	};
+ 	if (skb->ip_summed != CHECKSUM_PARTIAL) {
+ 		*sum = csum_fold(csum_partial(diff, sizeof(diff),