linux-kernel - Re: [RFC PATCH v2 2/4] Documentation: RCU: Refer to ptr

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Message-ID: <CAEXW_YQL3wY+BSMw3SOxDWbczrVfe9ALz8wqRjb9iPOBJq0xHQ@mail.gmail.com>
Date: Fri, 4 Oct 2024 17:15:15 -0400
From: Joel Fernandes <joel@...lfernandes.org>
To: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Boqun Feng <boqun.feng@...il.com>, linux-kernel@...r.kernel.org, 
	Linus Torvalds <torvalds@...ux-foundation.org>, Andrew Morton <akpm@...ux-foundation.org>, 
	Peter Zijlstra <peterz@...radead.org>, Nicholas Piggin <npiggin@...il.com>, 
	Michael Ellerman <mpe@...erman.id.au>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>, "Paul E. McKenney" <paulmck@...nel.org>, 
	Will Deacon <will@...nel.org>, Alan Stern <stern@...land.harvard.edu>, 
	John Stultz <jstultz@...gle.com>, Neeraj Upadhyay <Neeraj.Upadhyay@....com>, 
	Frederic Weisbecker <frederic@...nel.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>, 
	Jonas Oberhauser <jonas.oberhauser@...weicloud.com>, rcu@...r.kernel.org, linux-mm@...ck.org, 
	lkmm@...ts.linux.dev, Gary Guo <gary@...yguo.net>, Nikita Popov <github@...pov.com>, 
	llvm@...ts.linux.dev
Subject: Re: [RFC PATCH v2 2/4] Documentation: RCU: Refer to ptr_eq()

On Fri, Oct 4, 2024 at 2:29 PM Mathieu Desnoyers
<mathieu.desnoyers@...icios.com> wrote:
>
> Refer to ptr_eq() in the rcu_dereference() documentation.
>
> ptr_eq() is a mechanism that preserves address dependencies when
> comparing pointers, and should be favored when comparing a pointer
> obtained from rcu_dereference() against another pointer.
>
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> Acked-by: Alan Stern <stern@...land.harvard.edu>
> Acked-by: Paul E. McKenney <paulmck@...nel.org>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> Cc: "Paul E. McKenney" <paulmck@...nel.org>
> Cc: Will Deacon <will@...nel.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Boqun Feng <boqun.feng@...il.com>
> Cc: Alan Stern <stern@...land.harvard.edu>
> Cc: John Stultz <jstultz@...gle.com>
> Cc: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: Boqun Feng <boqun.feng@...il.com>
> Cc: Frederic Weisbecker <frederic@...nel.org>
> Cc: Joel Fernandes <joel@...lfernandes.org>

Reviewed-by: Joel Fernandes (Google) <joel@...lfernandes.org>

thanks,

 - Joel