From: Nathan Chancellor <redacted>
Date: Wed, 31 Jul 2019 11:50:24 -0700

arm allyesconfig warns:

WARNING: unmet direct dependencies detected for MDIO_OCTEON
  Depends on [n]: NETDEVICES [=y] && MDIO_DEVICE [=y] && MDIO_BUS [=y]
&& 64BIT && HAS_IOMEM [=y] && OF_MDIO [=y]
  Selected by [y]:
  - OCTEON_ETHERNET [=y] && STAGING [=y] && (CAVIUM_OCTEON_SOC &&
NETDEVICES [=y] || COMPILE_TEST [=y])

and errors:

In file included from ../drivers/net/phy/mdio-octeon.c:14:
../drivers/net/phy/mdio-octeon.c: In function 'octeon_mdiobus_probe':
../drivers/net/phy/mdio-cavium.h:111:36: error: implicit declaration of
function 'writeq'; did you mean 'writeb'?

The proper way to fix this is to include either

	linux/io-64-nonatomic-hi-lo.h

or

	linux/io-64-nonatomic-lo-hi.h

whichever is appropriate.