On Wed, May 13, 2015 at 12:34:48PM +0100, Build bot for Mark Brown wrote:

> 	arm64-allmodconfig
> ../drivers/bus/arm-ccn.c:924:3: error: implicit declaration of function '__hrtimer_start_range_ns' [-Werror=implicit-function-declaration]
> 
> 	arm-allmodconfig
> ../drivers/bus/arm-ccn.c:924:3: error: implicit declaration of function '__hrtimer_start_range_ns' [-Werror=implicit-function-declaration]

Today's -next fails to build both arm and arm64 allmodconfig due to the
above errors, introduced in commit ffa415245b8666c44d (bus: arm-ccn:
cpumask attribute).  Judging from the name of the symbol it appears that
the code is peering into hrtimer implementation details and indeed it
was removed in commit 58f1f803f1d6ef9 (hrtimer: Get rid of
__hrtimer_start_range_ns()) which has a commit message suggsting that
this has indeed been explicitly removed and no new references should be
added.