On Wednesday, January 4, 2017 4:48:45 PM CET Build bot for Mark Brown wrote:
Warnings Summary: 1 1 ../kernel/cpu.c:509:13: warning: 'cpu_notify_nofail' defined but not used [-Wunused-function]
The last build report we got for v4.4-rt did not have this warning. That was v4.4.32-rt43-188-g692bf90. I don't know what happened to the version numbers inbetween, but at some point a regression must have crept into either the stable kernels or the -rt patches.
Arnd