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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH] netfilter: use per-CPU r**ursive lock {XV}
Date: Tue, 28 Apr 2009 06:43:40 -0700 (PDT)
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From: Ingo Molnar <mingo@elte.hu>
Date: Tue, 28 Apr 2009 14:40:33 +0200

> IMHO this locking construct should be considered for 
> linux/local_lock.h and kernel/local_lock.c. Even if the netfilter 
> code drops its use soon afterwards ;-)

If you can show me have to pass a per-cpu variable (the variable,
not a dereference of it) as an argument to an inline function,
I'll implement this :-)

It has to be dereferenced after local_bh_disable() for the
read side acquisition.