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ar71xx: avoid __packed define in the unaligned access hack patch, make the ipv6 address struct also 2-byte-aligned/packed 

SVN-Revision: 35127
lede-17.01
Felix Fietkau 2013-01-13 13:06:09 +00:00
parent 5d55cece6e
commit 53e0ba49b9
1 changed files with 37 additions and 6 deletions
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43
target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch
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@ -57,7 +57,7 @@
__be32 daddr;
/*The options start here. */
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
struct ip_auth_hdr {
@ -68,7 +68,7 @@
struct in6_addr saddr;
struct in6_addr daddr;
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
/* index values for the variables in ipv6_devconf */
@ -79,7 +79,7 @@
__sum16 check;
__be16 urg_ptr;
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
/*
* The union cast uses a gcc extension to avoid aliasing problems
@ -88,7 +88,7 @@
struct tcphdr hdr;
__be32 words[5];
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
#define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3])
@ -99,7 +99,7 @@
__be16 len;
__sum16 check;
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
/* UDP socket options */
#define UDP_CORK 1 /* Never send partially complete segments */
@ -131,7 +131,7 @@
} frag;
} un;
-};
+} __packed __attribute__((aligned(2)));
+} __attribute__((packed, aligned(2)));
/*
@ -156,3 +156,34 @@
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");
@@ -880,7 +881,8 @@ static struct sk_buff **ipv6_gro_receive
continue;
iph2 = ipv6_hdr(p);
- first_word = *(__be32 *)iph ^ *(__be32 *)iph2 ;
+ first_word = __get_unaligned_cpu32((__u32 *) iph) ^
+ __get_unaligned_cpu32((__u32 *) iph2);
/* All fields must match except length and Traffic Class. */
if (nlen != skb_network_header_len(p) ||