tree f7c200742a2d6ce20e72ad976b66d30d1aa6a04d
parent fc390cde362309f6892bb719194f242c466a978b
author Tejun Heo <tj@kernel.org> 1273328453 +0200
committer Tejun Heo <tj@kernel.org> 1273331553 +0200

cpu_stop: add dummy implementation for UP

When !CONFIG_SMP, cpu_stop functions weren't defined at all which
could lead to build failures if UP code uses cpu_stop facility.  Add
dummy cpu_stop implementation for UP.  The waiting variants execute
the work function directly with preempt disabled and
stop_one_cpu_nowait() schedules a workqueue work.

Makefile and ifdefs around stop_machine implementation are updated to
accomodate CONFIG_SMP && !CONFIG_STOP_MACHINE case.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>