netdev - ixgbe / mdio dependancy error

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Date:   Wed, 2 Jan 2019 10:48:17 -0500
From:   Dave Jones <davej@...emonkey.org.uk>
To:     netdev@...r.kernel.org
Cc:     Stephen Douthit <stephend@...icom-usa.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: ixgbe / mdio dependancy error

If you build IXGBE=y, and MDIO_BUS=y, we currently fail the build like so:

  MODPOST vmlinux.o
drivers/net/ethernet/intel/ixgbe/ixgbe_main.o: In function `ixgbe_mdio_read':
/mnt/data/src/kernel/git-trees/linux-dj/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8801: undefined reference to `mdiobus_read'
drivers/net/ethernet/intel/ixgbe/ixgbe_main.o: In function `ixgbe_remove':
/mnt/data/src/kernel/git-trees/linux-dj/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:11198: undefined reference to `mdiobus_unregister'
drivers/net/ethernet/intel/ixgbe/ixgbe_main.o: In function `ixgbe_mdio_write':
/mnt/data/src/kernel/git-trees/linux-dj/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:8824: undefined reference to `mdiobus_write'
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.o: In function `devm_mdiobus_alloc':
/mnt/data/src/kernel/git-trees/linux-dj/./include/linux/phy.h:264: undefined reference to `devm_mdiobus_alloc_size'
drivers/net/ethernet/intel/ixgbe/ixgbe_phy.o: In function `ixgbe_mii_bus_init':
/mnt/data/src/kernel/git-trees/linux-dj/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c:955: undefined reference to `devm_mdiobus_free'
/mnt/data/src/kernel/git-trees/linux-dj/drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c:952: undefined reference to `__mdiobus_register'
Makefile:1027: recipe for target 'vmlinux' failed
make: *** [vmlinux] Error 1


full .config is at http://paste.debian.net/1058334/

	Dave