linux-kernel - Re: [PATCH] arm: smp: Avoid false positive CPU hotplug Lockdep-RCU splat

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Message-ID: <c0001d35-a75a-4cdf-917b-8e1ec159502d@nokia.com>
Date: Mon, 11 Mar 2024 17:17:43 +0100
From: Stefan Wiehler <stefan.wiehler@...ia.com>
To: "Russell King (Oracle)" <linux@...linux.org.uk>
Cc: "Paul E. McKenney" <paulmck@...nel.org>,
 Joel Fernandes <joel@...lfernandes.org>,
 Josh Triplett <josh@...htriplett.org>, Boqun Feng <boqun.feng@...il.com>,
 Steven Rostedt <rostedt@...dmis.org>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Lai Jiangshan <jiangshanlai@...il.com>, Zqiang <qiang.zhang1211@...il.com>,
 linux-arm-kernel@...ts.infradead.org, rcu@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm: smp: Avoid false positive CPU hotplug Lockdep-RCU
 splat

> So what do I do about this? I see you submitted this to the patch system
> on the 8th March, but proposed a different approach on the 9th March. I
> don't see evidence that Paul is happy with the original approach either
> and there's no ack/r-b's on anything here.

I think we need to wait for feedback from Will Deacon regarding the new
arch_spin_lock() based approach. So please abandon the original proposal in the
patch system, at least for now…