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From: Jakub Kicinski <kuba@kernel.org>
To: tglx@linutronix.de
Cc: Vladimir Oltean <vladimir.oltean@nxp.com>,
	Jeongjun Park <aha310510@gmail.com>,
	richardcochran@gmail.com, andrew+netdev@lunn.ch,
	davem@davemloft.net, edumazet@google.com, pabeni@redhat.com,
	yangbo.lu@nxp.com, anna-maria@linutronix.de, frederic@kernel.org,
	netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	syzbot+7cfb66a237c4a5fb22ad@syzkaller.appspotmail.com
Subject: Re: [PATCH net v4] ptp: prevent possible ABBA deadlock in ptp_clock_freerun()
Date: Tue, 5 Aug 2025 16:52:26 -0700	[thread overview]
Message-ID: <20250805165226.5e52e8a9@kernel.org> (raw)
In-Reply-To: <20250729154811.a7lg26iuszzoo2sp@skbuf>

On Tue, 29 Jul 2025 18:48:11 +0300 Vladimir Oltean wrote:
> > +static void ptp_vclock_set_subclass(struct ptp_clock *ptp)
> > +{
> > +	lockdep_set_subclass(&ptp->clock.rwsem, PTP_LOCK_VIRTUAL);  
> 
> Just not sure whether the PTP clock should be exposing this API, or the
> POSIX clock, who actually owns the rwsem.

Hi Thomas, how do you feel about PTP setting lockdep class on the clock
rwsem? Link: https://lore.kernel.org/20250728062649.469882-1-aha310510@gmail.com

  reply	other threads:[~2025-08-05 23:52 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-07-28  6:26 [PATCH net v4] ptp: prevent possible ABBA deadlock in ptp_clock_freerun() Jeongjun Park
2025-07-28 14:09 ` Richard Cochran
2025-07-29 15:48 ` Vladimir Oltean
2025-08-05 23:52   ` Jakub Kicinski [this message]
2025-08-24  3:23 ` Jeongjun Park

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