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

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Date:   Tue, 9 Feb 2021 17:13:15 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Mike Galbraith <efault@....de>
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, 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.