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[PATCH] tcp: fix tcp_fastopen unaligned access complaints on sparc

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Fix up a data alignment issue on sparc by swapping the order
of the cookie byte array field with the length field in
struct tcp_fastopen_cookie

This addresses log complaints like these:
    log_unaligned: 113 callbacks suppressed
    Kernel unaligned access at TPC[976490] tcp_try_fastopen+0x2d0/0x360
    Kernel unaligned access at TPC[9764ac] tcp_try_fastopen+0x2ec/0x360
    Kernel unaligned access at TPC[9764c8] tcp_try_fastopen+0x308/0x360
    Kernel unaligned access at TPC[9764e4] tcp_try_fastopen+0x324/0x360
    Kernel unaligned access at TPC[976490] tcp_try_fastopen+0x2d0/0x360

Signed-off-by: Shannon Nelson <shannon.nelson@oracle.com>
---
 include/linux/tcp.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/linux/tcp.h b/include/linux/tcp.h
index fc5848d..95cda75 100644
--- a/include/linux/tcp.h
+++ b/include/linux/tcp.h
@@ -62,8 +62,8 @@ static inline unsigned int tcp_optlen(const struct sk_buff *skb)
 
 /* TCP Fast Open Cookie as stored in memory */
 struct tcp_fastopen_cookie {
-	s8	len;
 	u8	val[TCP_FASTOPEN_COOKIE_MAX];
+	s8	len;
 	bool	exp;	/* In RFC6994 experimental option format */
 };
 
-- 
1.7.1

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[PATCH] tcp: fix tcp_fastopen unaligned access complaints on sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 21:00 +0100
  Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 21:20 +0100
    Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Rob Gardner <rob.gardner@oracle.com> - 2017-01-12 21:20 +0100
      Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 21:30 +0100
        Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 21:40 +0100
        Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 21:40 +0100
          Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 21:50 +0100
            Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 22:00 +0100
              Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 22:20 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Eric Dumazet <eric.dumazet@gmail.com> - 2017-01-12 22:40 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 22:50 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc Shannon Nelson <shannon.nelson@oracle.com> - 2017-01-12 23:00 +0100
                Re: [PATCH] tcp: fix tcp_fastopen unaligned access complaints on  sparc David Miller <davem@davemloft.net> - 2017-01-12 23:00 +0100

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