The new jhash implementation

    The current jhash.h implements the lookup2() hash function by Bob Jenkins.
    However, lookup2() is outdated as Bob wrote a new hash function called
    lookup3(). The patch replaces the lookup2() implementation of the 'jhash*'
    functions with that of lookup3().

    You can read a longer comparison of the two and other hash functions at
    http://burtleburtle.net/bob/hash/doobs.html.

    Change-Id: Ia319e0e1ade37687096d76e777d08937d05c1d4e
    Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
    Acked-by: Rusty Russell <rusty@rustcorp.com.au>
    Signed-off-by: David S. Miller <davem@davemloft.net>