linux-kernel - Re: [PATCH v2] clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE

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Message-ID: <87h7j324w2.ffs@nanos.tec.linutronix.de>
Date:   Sat, 15 May 2021 21:06:37 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Wei Liu <wei.liu@...nel.org>,
        Michael Kelley <mikelley@...rosoft.com>
Cc:     vkuznets <vkuznets@...hat.com>,
        "linux-hyperv\@vger.kernel.org" <linux-hyperv@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Mohammed Gamal <mgamal@...hat.com>,
        Wei Liu <wei.liu@...nel.org>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Dexuan Cui <decui@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "linux-kernel\@vger.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] clocksource/drivers/hyper-v: Re-enable VDSO_CLOCKMODE_HVCLOCK on X86

On Sat, May 15 2021 at 15:43, Wei Liu wrote:

> On Thu, May 13, 2021 at 01:29:12PM +0000, Michael Kelley wrote:
>> From: Vitaly Kuznetsov <vkuznets@...hat.com> Sent: Thursday, May 13, 2021 12:33 AM
>> > 
>> > Mohammed reports (https://bugzilla.kernel.org/show_bug.cgi?id=213029)
>> > the commit e4ab4658f1cf ("clocksource/drivers/hyper-v: Handle vDSO
>> > differences inline") broke vDSO on x86. The problem appears to be that
>> > VDSO_CLOCKMODE_HVCLOCK is an enum value in 'enum vdso_clock_mode' and
>> > '#ifdef VDSO_CLOCKMODE_HVCLOCK' branch evaluates to false (it is not
>> > a define). Use a dedicated HAVE_VDSO_CLOCKMODE_HVCLOCK define instead.
>> > 
>> > Suggested-by: Thomas Gleixner <tglx@...utronix.de>
>> > Reported-by: Mohammed Gamal <mgamal@...hat.com>
>> > Fixes: e4ab4658f1cf ("clocksource/drivers/hyper-v: Handle vDSO differences inline")
>> > Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
> [...]
>> 
>> Reviewed-by: Michael Kelley <mikelley@...rosoft.com>
>> 
> Applied to hyperv-fixes. Thanks.

It's already in the tip tree...