Re: [patch] generic-pidhash-2.5.36-D4, BK-curr

From: Russell King (
Date: Fri Sep 20 2002 - 07:15:25 EST

On Fri, Sep 20, 2002 at 03:43:47PM +0400, Oleg Drokin wrote:
> On Fri, Sep 20, 2002 at 11:40:16AM +0200, Ingo Molnar wrote:
> > we need a cmpxchg() function in the generic library, using a spinlock.
> But this is not safe for arches that provides SMP but does not provide
> cmpxchg in hadware, right?
> I mean it is only safe to use such spinlock-based function if
> all other places read and write this value via special functions that are
> also taking this spinlock.


> Do you think we can count on this?

I don't think so.

Russell King (                The developer of ARM Linux

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