linux-kernel - Re: [PATCH] fib_trie: rcu_assign

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Message-ID: <20080213225555.GN12393@linux.vnet.ibm.com>
Date:	Wed, 13 Feb 2008 14:55:55 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Jarek Poplawski <jarkao2@...il.com>
Cc:	David Miller <davem@...emloft.net>, shemminger@...tta.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fib_trie: rcu_assign_pointer warning fix

On Tue, Feb 12, 2008 at 08:46:30PM +0100, Jarek Poplawski wrote:
> On Tue, Feb 12, 2008 at 08:32:18PM +0100, Jarek Poplawski wrote:
> ...
> > It seems the above version of this macro uses the barrier for 0, but
> > if I miss something, or for these other: documenting reasons,
> 
> ...or __builtin_constants could be used for indexing (?!),

Yep.  For example:

	elem[0].next = 1;
	rcu_assign_index(global_index, 0);

							Thanx, Paul

> > then of
> > course you are right.
> 
> Jarek P.
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