Hi Richard,

I love your patch! Perhaps something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Richard-Cochran/Peer-to-Peer-One-Step-time-stamping/20190531-200348
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-rc1-7-g2b96cd8-dirty
        make ARCH=x86_64 allmodconfig
        make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <redacted>


sparse warnings: (new ones prefixed by >>)

quoted

drivers/of/of_mdio.c:46:24: sparse: sparse: symbol 'of_find_mii_timestamper' was not declared. Should it be static?

Please review and possibly fold the followup patch.

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