next-20160225 build: 2 failures 44 warnings (next-20160225)

[Mark Brown]

On Thu, Feb 25, 2016 at 10:04:29AM +0000, Build bot for Mark Brown wrote:

Today's -next fails to build an arm64 allmodconfig due to:

> 	arm64-allmodconfig
> ../drivers/watchdog/orion_wdt.c:109:2: error: implicit declaration of function 'atomic_io_modify' [-Werror=implicit-function-declaration]

also caused by b4f596b19624 (arm64: add mvebu architecture entry) which
enables MVBEU on arm64, the commit was present for a little while and
the error cropped up but didn't get reported due to other things masking
it.  atomic_io_modify() is only available on ARM, I'm unsure if this
needs a driver change or if the driver is just specific to older
hardware anyway.  The code is only used in the init path accessing what
look to be device specific registers so I'm not 100% clear why it
specifically needs to be an atomic modify.
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