linux-kernel - Re: [GIT pull] sched/urgent for v5.9-rc2

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Date:   Sun, 30 Aug 2020 11:54:19 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Marco Elver <elver@...gle.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: [GIT pull] sched/urgent for v5.9-rc2

On Sun, Aug 30, 2020 at 11:04 AM Thomas Gleixner <tglx@...utronix.de> wrote:
>
>  - Make is_idle_task() __always_inline to prevent the compiler from putting
>    it out of line into the wrong section because it's used inside noinstr
>    sections.

What completely broken compiler uninlined that single-instruction function?

I've obviously pulled this, but it sounds like there should be a
compiler bug-report for this insane behavior.

Or is Marco building the kernel without optimizations or something
like that? That has not been a supported model, for various good
reasons..

                     Linus