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Joel Schopp authored
On Power4 and earlier hardware there is no need to clear the CPPR (see RPAp 479 section 18.5.4.7.2 for what little info there is on the CPPR) when stopping a cpu. On hardware that uses Power5 an undocumented change has been made that requires the CPPR to be cleared if an isolate is to be done on the stopped cpu. So the following patch lets cpu hotplug work on the recent hardware. I sent this patch to the ppc64-dev list back in mid April and Suse picked it up then for SLES9 so it has been well tested for several months. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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