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Date: Mon, 14 Feb 2011 18:52:49 -0500
From: Mathieu Desnoyers <compudj@krystal.dyndns.org>
To: David Miller <davem@davemloft.net>
CC: matt@console-pimps.org, rostedt@goodmis.org, peterz@infradead.org,
        will.newton@gmail.com, jbaron@redhat.com, hpa@zytor.com, mingo@elte.hu,
        tglx@linutronix.de, andi@firstfloor.org, roland@redhat.com,
        rth@redhat.com, masami.hiramatsu.pt@hitachi.com, fweisbec@gmail.com,
        avi@redhat.com, sam@ravnborg.org, ddaney@caviumnetworks.com,
        michael@ellerman.id.au, linux-kernel@vger.kernel.org,
        vapier@gentoo.org, cmetcalf@tilera.com, dhowells@redhat.com,
        schwidefsky@de.ibm.com, heiko.carstens@de.ibm.com,
        benh@kernel.crashing.org, paulmck@linux.vnet.ibm.com
Subject: Re: [PATCH 0/2] jump label: 2.6.38 updates
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* Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) wrote:
> * David Miller (davem@davemloft.net) wrote:
[...]
> > We can't wholesale to atomic_t because we do this on variables of
> > all sizes, not just 32-bit ones.
> > 
> > We do them on pointers in the networking for example.
> 
> We have atomic_long_t for this, but yeah, it would kind of suck to have
> to create
> 
> union {
> 	atomic_long_t atomic;
> 	void *ptr;
> }

Actually, using a union for this is probably one of the worse idea I've
had recently. Just casting the pointer to unsigned long and vice-versa,
using atomic_long_*() ops would do the trick. But let's wait and see if
it's really needed.

Thanks,

Mathieu

> 
> all around the place. Let's see if we can get to know which PowerPC
> processor family all this fuss is about, and where this rumour
> originates from.
> 
> Thanks,
> 
> Mathieu
> 
> 
> -- 
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com
--
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