linux-kernel - Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV}

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Message-ID: <alpine.LFD.2.00.0904271602390.22156@localhost.localdomain>
Date:	Mon, 27 Apr 2009 16:03:52 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Stephen Hemminger <shemminger@...tta.com>
cc:	Evgeniy Polyakov <zbr@...emap.net>, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Eric Dumazet <dada1@...mosbay.com>,
	David Miller <davem@...emloft.net>,
	Jarek Poplawski <jarkao2@...il.com>,
	Paul Mackerras <paulus@...ba.org>, paulmck@...ux.vnet.ibm.com,
	kaber@...sh.net, jeff.chua.linux@...il.com, laijs@...fujitsu.com,
	jengelh@...ozas.de, r000n@...0n.net, linux-kernel@...r.kernel.org,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org,
	benh@...nel.crashing.org
Subject: Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV}



On Mon, 27 Apr 2009, Linus Torvalds wrote:
> 
> BTW: THIS IS TOTALLY UNTESTED.

Gaah. I should have read through it one more time before sending.

> static inline void xt_info_rdunlock_bh(void)
> {
> 	struct xt_info_lock *lock;
> 
> 	lock = &__get_cpu_var(xt_info_locks);
> 	if (!--lock->readers)
> 		spin_unlock(&lock->lock);
> }

This one was missing the "local_bh_enable()" at the end.

There may be other bugs, but that's the one I noticed immediately when 
reading what I sent out. Oops.

			Linus
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