Re: [PATCH -next v2 09/11] rcu: Document rcu_access_pointer() feeding into cmpxchg()

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From: Frederic Weisbecker

Date: Wed May 20 2026 - 08:44:22 EST

Le Tue, May 19, 2026 at 09:45:22PM +0200, Uladzislau Rezki (Sony) a écrit :
> From: "Paul E. McKenney" <paulmck@xxxxxxxxxx>
>
> This commit documents the rcu_access_pointer() use case for fetching the
> old value of an RCU-protected pointer within a lockless updater for use
> by an atomic cmpxchg() operation.
>
> Reported-by: Maxim Mikityanskiy <maximmi@xxxxxxxxxx>
> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
> Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>

Reviewed-by: Frederic Weisbecker <frederic@xxxxxxxxxx>

--
Frederic Weisbecker
SUSE Labs