Re: [PATCH 1/7] x86/fpu: Simplify the fpu->last_cpu logic and rename it to fpu->fpregs_cached

[Rik van Riel]

On Thu, 2017-01-26 at 12:26 +0100, Ingo Molnar wrote:

> index c56fb57f2991..7eb2f3041fde 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -1253,6 +1253,8 @@ void set_task_cpu(struct task_struct *p,
> unsigned int new_cpu)
> Â			p->sched_class->migrate_task_rq(p);
> Â		p->se.nr_migrations++;
> Â		perf_event_task_migrate(p);
> +
> +		arch_task_migrate(p);
> Â	}
> 

Does it really count as a "simplification" if you add a
scheduler callback?

This code does not seem any easier to understand than
the old code...