linux-kernel - RE: [PATCH] vmbus: Remove the undesired put_cpu_ptr() in hv_synic

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Date:   Sat, 13 Apr 2019 02:19:52 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        "apw@...onical.com" <apw@...onical.com>,
        "olaf@...fle.de" <olaf@...fle.de>, vkuznets <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH] vmbus: Remove the undesired put_cpu_ptr() in
 hv_synic_cleanup()

From: Dexuan Cui <decui@...rosoft.com>  Sent: Friday, April 12, 2019 4:35 PM
> 
> With CONFIG_DEBUG_PREEMPT=y, the put_cpu_ptr() triggiers an underflow
> warning in preempt_count_sub().
> 
> Fixes: 37cdd991fac8 ("vmbus: put related per-cpu variable together")
> Cc: stable@...r.kernel.org
> Cc: Stephen Hemminger <sthemmin@...rosoft.com>
> Signed-off-by: Dexuan Cui <decui@...rosoft.com>

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>