linux-kernel - Re: [RFC PATCH 0/2] Introduce a way to adjust CLOCK

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Date:   Wed, 10 Feb 2021 11:49:09 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Hikaru Nishida <hikalium@...omium.org>
Cc:     linux-kernel@...r.kernel.org, suleiman@...gle.com,
        Alexander Graf <graf@...zon.com>,
        Andra Paraschiv <andraprs@...zon.com>,
        Arnd Bergmann <arnd@...db.de>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Ingo Molnar <mingo@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Kurt Kanzenbach <kurt@...utronix.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [RFC PATCH 0/2] Introduce a way to adjust CLOCK_BOOTTIME from
 userspace for VM guests

On Wed, Feb 10, 2021 at 07:39:06PM +0900, Hikaru Nishida wrote:
> From: Hikaru Nishida <hikalium@...omium.org>
> 
> 
> Hi folks,
> 
> We'd like to add a sysfs interface that enable us to advance
> CLOCK_BOOTTIME from userspace.

Why sysfs?  What device is the clock that you are attaching to here?
Why not use the existing kernel api to adjust clocks?

thanks,

greg k-h