From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Date: Tue, 12 Nov 2013 16:41:26 +0000 (+0530)
Subject: sched: Check sched_domain before computing group power
X-Git-Tag: v3.13-rc3~24^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9abf24d465180f5f2eb26a43545348262f16b771;p=pandora-kernel.git

sched: Check sched_domain before computing group power

After commit 863bffc80898 ("sched/fair: Fix group power_orig
computation"), we can dereference rq->sd before it is set.

Fix this by falling back to power_of() in this case and add a comment
explaining things.

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
[ Added comment and tweaked patch. ]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: mikey@neuling.org
Link: http://lkml.kernel.org/r/20131113151718.GN21461@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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