linux-kernel - Re: [PATCH tip/core/urgent 1/4] rcu: add rcu_access_pointer and rcu_dereference

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Message-ID: <23572.1270804211@redhat.com>
Date:	Fri, 09 Apr 2010 10:10:11 +0100
From:	David Howells <dhowells@...hat.com>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org, mingo@...e.hu,
	laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, eric.dumazet@...il.com
Subject: Re: [PATCH tip/core/urgent 1/4] rcu: add rcu_access_pointer and rcu_dereference_protected

Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> +#define rcu_access_pointer(p) ((void *)ACCESS_ONCE(p))
> ...
> +#define rcu_access_pointer(p)		((void *)ACCESS_ONCE(p))

There's no difference between your two versions of rcu_access_pointer(), so
you could move that whole construct outside of the #ifdef'ed section.

Other than that:

Acked-by: David Howells <dhowells@...hat.com>
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