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

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To: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Subject: Re: [PATCH v1 0/2] Introduce ptr_eq() to preserve address dependency
From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Date: Sun, 29 Sep 2024 11:50:52 -0400
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>, "Paul E. McKenney" <paulmck@xxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Boqun Feng <boqun.feng@xxxxxxxxx>, John Stultz <jstultz@xxxxxxxxxx>, Neeraj Upadhyay <Neeraj.Upadhyay@xxxxxxx>, Frederic Weisbecker <frederic@xxxxxxxxxx>, Joel Fernandes <joel@xxxxxxxxxxxxxxxxx>, Josh Triplett <josh@xxxxxxxxxxxxxxxx>, Uladzislau Rezki <urezki@xxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Lai Jiangshan <jiangshanlai@xxxxxxxxx>, Zqiang <qiang.zhang1211@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Waiman Long <longman@xxxxxxxxxx>, Mark Rutland <mark.rutland@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Vlastimil Babka <vbabka@xxxxxxx>, maged.michael@xxxxxxxxx, Mateusz Guzik <mjguzik@xxxxxxxxx>, Gary Guo <gary@xxxxxxxxxxx>, Jonas Oberhauser <jonas.oberhauser@xxxxxxxxxxxxxxx>, rcu@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, lkmm@xxxxxxxxxxxxxxx, Nikita Popov <github@xxxxxxxxxx>, llvm@xxxxxxxxxxxxxxx
In-reply-to: <20240929111608.1016757-1-mathieu.desnoyers@efficios.com>
References: <20240929111608.1016757-1-mathieu.desnoyers@efficios.com>

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@xxxxxxxxxxxxxxxxxxx>

Alan Stern

References:
- [PATCH v1 0/2] Introduce ptr_eq() to preserve address dependency
  - From: Mathieu Desnoyers

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