Hi Eric,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Eric-Dumazet/inet-frags-bring-rhashtables-to-IP-defrag/20180331-142351
reproduce:
        # apt-get install sparse
        make ARCH=x86_64 allmodconfig
        make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

quoted

net/ieee802154/6lowpan/reassembly.c:600:32: sparse: symbol 'lowpan_rhash_params' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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