linux-kernel - Re: [patch] preempt: select PREEMPT_DYNAMIC under PREEMPTION instead of PREEMPT

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Message-ID: <967ba94b84727c6b16b18ec7afba916d7852a9e1.camel@gmx.de>
Date:   Tue, 09 Feb 2021 17:46:15 +0100
From:   Mike Galbraith <efault@....de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Michal Hocko <mhocko@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [patch] preempt: select PREEMPT_DYNAMIC under PREEMPTION
 instead of PREEMPT

On Tue, 2021-02-09 at 17:19 +0100, Peter Zijlstra wrote:
> On Tue, Feb 09, 2021 at 05:13:15PM +0100, Peter Zijlstra wrote:
> > On Tue, Feb 09, 2021 at 05:05:14PM +0100, Mike Galbraith wrote:
> >
> > > ld: init/main.o: in function `trace_initcall_start':
> > > /backup/usr/local/src/kernel/linux-tip-rt/./include/trace/events/initcall.h:27: undefined reference to `__SCT__preempt_schedule_notrace'
> >
> > Ooohh... this is because x86 can't build PREEMPT without PREEMPT_DYNAMIC
> > anymore. Maybe I should fix that. Lemme see what that would take.
>
> Does this work?

Yup, worked fine.

	-Mike