Re: [PATCH v3 5/5] mutex: Move mutex spinning code from sched/core.c back to mutex.c

[Ingo Molnar <mingo@kernel.org>]

* Waiman Long <Waiman.Long@hp.com> wrote:

> As mentioned by Ingo, the SCHED_FEAT_OWNER_SPIN scheduler feature
> bit was really just an early hack to make with/without mutex-spinning
> testable. So it is no longer necessary.
> 
> This patch removes the SCHED_FEAT_OWNER_SPIN feature bit and move the
> mutex spinning code from kernel/sched/core.c back to kernel/mutex.c
> which is where they should belong.
> 
> Signed-off-by: Waiman Long <Waiman.Long@hp.com>
> ---
>  include/linux/sched.h   |    4 ---
>  kernel/mutex.c          |   62 ++++++++++++++++++++++++++++++++++++++++++++++
>  kernel/sched/core.c     |   63 -----------------------------------------------
>  kernel/sched/features.h |    7 -----
>  4 files changed, 62 insertions(+), 74 deletions(-)

Please move this patch first in the series - so that later, functional patches are 
easier to revert, should the need arise. When possible we sort patches by risk: 
low risk ones first, riskier come later.

Thanks,

	Ingo