linux-kernel - Re: [PATCH v1 0/2] Introduce ptr_eq() to preserve address dependency

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Message-ID: <df54d990-537a-418d-b748-7cc140eba236@rowland.harvard.edu>
Date: Sun, 29 Sep 2024 11:50:52 -0400
From: Alan Stern <stern@...land.harvard.edu>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Will Deacon <will@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Boqun Feng <boqun.feng@...il.com>, John Stultz <jstultz@...gle.com>,
	Neeraj Upadhyay <Neeraj.Upadhyay@....com>,
	Frederic Weisbecker <frederic@...nel.org>,
	Joel Fernandes <joel@...lfernandes.org>,
	Josh Triplett <josh@...htriplett.org>,
	Uladzislau Rezki <urezki@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Lai Jiangshan <jiangshanlai@...il.com>,
	Zqiang <qiang.zhang1211@...il.com>, Ingo Molnar <mingo@...hat.com>,
	Waiman Long <longman@...hat.com>,
	Mark Rutland <mark.rutland@....com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Vlastimil Babka <vbabka@...e.cz>, maged.michael@...il.com,
	Mateusz Guzik <mjguzik@...il.com>, Gary Guo <gary@...yguo.net>,
	Jonas Oberhauser <jonas.oberhauser@...weicloud.com>,
	rcu@...r.kernel.org, linux-mm@...ck.org, lkmm@...ts.linux.dev,
	Nikita Popov <github@...pov.com>, llvm@...ts.linux.dev
Subject: Re: [PATCH v1 0/2] Introduce ptr_eq() to preserve address dependency

On Sun, Sep 29, 2024 at 07:16:06AM -0400, Mathieu Desnoyers wrote:
> Introduce ptr_eq() to compare two addresses while preserving the address
> dependencies for later use of the address. It should be used when
> comparing an address returned by rcu_dereference().

Both patches are now much better.  Thank you.

Acked-by: Alan Stern <stern@...land.harvard.edu>

Alan Stern