linux-kernel - Re: [PATCH] Fix x86_64 _spin_lock

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Message-Id: <1156417982.3014.58.camel@laptopd505.fenrus.org>
Date:	Thu, 24 Aug 2006 13:13:02 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Suleiman Souhlal <ssouhlal@...eBSD.org>
Cc:	Andi Kleen <ak@...e.de>, Edward Falk <efalk@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix x86_64 _spin_lock_irqsave()

On Thu, 2006-08-24 at 13:04 +0200, Suleiman Souhlal wrote:
> Andi Kleen wrote:
> > Edward Falk <efalk@...gle.com> writes:
> > 
> > 
> >>Add spin_lock_string_flags and _raw_spin_lock_flags() to
> >>asm-x86_64/spinlock.h so that _spin_lock_irqsave() has the same
> >>semantics on x86_64 as it does on i386 and does *not* have interrupts
> >>disabled while it is waiting for the lock.
> > 
> > 
> > Did it fix anything for you?
> 
> I think this was to work around the fact that some buggy drivers try to 
> grab spinlocks without disabling interrupts when they should,

then fix the drivers ;)



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