linux-kernel - Re: [PATCH] nf_nat_h323.c unneeded rcu

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Message-ID: <20071030153704.GB8285@linux.vnet.ibm.com>
Date:	Tue, 30 Oct 2007 08:37:04 -0700
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	Patrick McHardy <kaber@...sh.net>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	rusty@....ibm.com, zhaojingmin@...rs.sourceforge.net,
	davem@...emloft.net
Subject: Re: [PATCH] nf_nat_h323.c unneeded rcu_dereference() calls

On Tue, Oct 30, 2007 at 03:06:20PM +0100, Patrick McHardy wrote:
> Paul E. McKenney wrote:
> >Hello!
> >
> >While reviewing rcu_dereference() uses, I came across a number of cases
> >where I couldn't see how the rcu_dereference() helped.  One class of
> >cases is where the variable is never subsequently dereferenced, so that
> >patches like the following one would be appropriate.
> >
> >So, what am I missing here?
> 
> Nothing, it was mainly intended as documentation that the hooks are
> protected by RCU. I agree that its probably more confusing this way
> since we're not even in a rcu_read_lock protected section.
> 
> I've queued a patch to remove them all.

Thank you!!!

						Thanx, Paul
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