From: Gregory Haskins <ghaskins@novell.com>
Date: Sat, 8 Mar 2008 05:10:15 +0000 (-0500)
Subject: cpu hotplug: adjust root-domain->online span in response to hotplug event
X-Git-Tag: v2.6.25-rc5~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=393d94d98b19089ec172566e23557997931b137e;p=pandora-kernel.git

cpu hotplug: adjust root-domain->online span in response to hotplug event

We currently set the root-domain online span automatically when the
domain is added to the cpu if the cpu is already a member of
cpu_online_map.

This was done as a hack/bug-fix for s2ram, but it also causes a problem
with hotplug CPU_DOWN transitioning.  The right way to fix the original
problem is to actually respond to CPU_UP events, instead of CPU_ONLINE,
which is already too late.

This solves the hung reboot regression reported by Andrew Morton and
others.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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