mirror/openwrt
1
0
Fork 0
mirror of https://git.openwrt.org/openwrt/openwrt.git synced 2024-10-20 06:28:12 +02:00
Code Issues

ar71xx: extend the unaligned access hacks to a few more places that showed up in the new kernel

Browse Source 
SVN-Revision: 35124
This commit is contained in:
Felix Fietkau 2013-01-13 11:33:44 +00:00
parent dc248b811f
commit 310724c14d
1 changed files with 41 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
target/linux/ar71xx/patches-3.7/902-unaligned_access_hacks.patch
View File

@ -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;