linux-kernel - Re: [patch 5/5] PTP: add kvm PTP driver

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Message-ID: <20170120142030.GB1365@potion>
Date:   Fri, 20 Jan 2017 15:20:30 +0100
From:   Radim Krcmar <rkrcmar@...hat.com>
To:     Marcelo Tosatti <mtosatti@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Richard Cochran <richardcochran@...il.com>,
        Miroslav Lichvar <mlichvar@...hat.com>
Subject: Re: [patch 5/5] PTP: add kvm PTP driver

2017-01-20 15:12+0100, Radim Krcmar:
> 2017-01-20 10:20-0200, Marcelo Tosatti:
>> +	spin_lock(&kvm_ptp_lock);
> 
> What does the lock prevent?

clock_off/clock_off_gpa. :)