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-rw-r--r--target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch41
1 files changed, 41 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch b/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch
index 23ee8a8aa..7e4cf9fea 100644
--- a/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch
+++ b/target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch
@@ -83,6 +83,15 @@
/*
* 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];
+-};
++} __packed __attribute__((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 {
@@ -115,3 +124,35 @@
return true;
}
+--- a/include/uapi/linux/icmp.h
++++ b/include/uapi/linux/icmp.h
+@@ -80,7 +80,7 @@ struct icmphdr {
+ __be16 mtu;
+ } frag;
+ } un;
+-};
++} __packed __attribute__((aligned(2)));
+
+
+ /*
+--- a/net/ipv4/tcp_input.c
++++ b/net/ipv4/tcp_input.c
+@@ -3842,13 +3842,14 @@ 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 (__get_unaligned_cpu32(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;