upstream ea53069231
x86, hotplug: Use mwait to offline a processor, fix the legacy case
Here included also some small follow-on patches to the same code:
upstream a68e5c94f7
x86, hotplug: Move WBINVD back outside the play_dead loop
upstream ce5f68246b
x86, hotplug: In the MWAIT case of play_dead, CLFLUSH the cache line
https://bugzilla.kernel.org/show_bug.cgi?id=5471
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>