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    Subject[patch v3 36/36] Add extra arch overrides to asm-generic/checksum.h
    There are plausible reasons for architectures to provide their own
    versions of csum_partial_copy_nocheck and csum_tcpudp_magic.
    By protecting these, the architecture can still re-use the
    asm-generic checksum.h, instead of copying it.

    Signed-off-by: Linas Vepstas <linas@codeaurora.org>
    Acked-by: Arnd Bergmann <arnd@arndb.de>

    ---
    include/asm-generic/checksum.h | 4 ++++
    1 file changed, 4 insertions(+)
    Index: linux-hexagon-kernel/include/asm-generic/checksum.h
    ===================================================================
    --- linux-hexagon-kernel.orig/include/asm-generic/checksum.h 2011-09-03 20:14:46.214943511 -0500
    +++ linux-hexagon-kernel/include/asm-generic/checksum.h 2011-09-03 20:14:59.874981811 -0500
    @@ -33,8 +33,10 @@
    extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,
    int len, __wsum sum, int *csum_err);

    +#ifndef csum_partial_copy_nocheck
    #define csum_partial_copy_nocheck(src, dst, len, sum) \
    csum_partial_copy((src), (dst), (len), (sum))
    +#endif

    /*
    * This is a version of ip_compute_csum() optimized for IP headers,
    @@ -63,12 +65,14 @@
    unsigned short proto, __wsum sum);
    #endif

    +#ifndef csum_tcpudp_magic
    static inline __sum16
    csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,
    unsigned short proto, __wsum sum)
    {
    return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
    }
    +#endif

    /*
    * this routine is used for miscellaneous IP-like checksums, mainly
    --

    Sent by an employee of the Qualcomm Innovation Center, Inc.
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.



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