Messages in this thread | | | Date | Wed, 04 Jul 2007 11:09:04 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [PATCH] x86: make SMP locks handling interact properly with CONFIG_DEBUG_RODATA (2nd try) |
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Dave Jones wrote: > On Wed, Jul 04, 2007 at 08:41:39AM -0700, Jeremy Fitzhardinge wrote: > > > I'd already posted a patch to remove smp alternatives. I thought it had > > been merged already, but I guess it's in Andi's queue. > > What was the rationale behind that? Given many distros have now > moved to shipping just an SMP kernel, this seems like a step backwards? >
No, there's two mechanisms. There's the clobber the lock prefix thing, which is unaffected. And there's smp_alternatives, which was a more ambitious mechanism to completely replace instructions in the SMP vs non-SMP cases, which is completely unused and therefore removed.
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