Re: [tip:sched/urgent] sched: Check sched_domain before computinggroup power

[David Rientjes]

On Tue, 19 Nov 2013, tip-bot for Srikar Dronamraju wrote:

> Commit-ID:  9abf24d465180f5f2eb26a43545348262f16b771
> Gitweb:     http://git.kernel.org/tip/9abf24d465180f5f2eb26a43545348262f16b771
> Author:     Srikar Dronamraju <srikar@xxxxxxxxxxxxxxxxxx>
> AuthorDate: Tue, 12 Nov 2013 22:11:26 +0530
> Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
> CommitDate: Tue, 19 Nov 2013 17:01:15 +0100
> 
> 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@xxxxxxxxxxxxxxxxxx>
> [ Added comment and tweaked patch. ]
> Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: mikey@xxxxxxxxxxx
> Link: http://lkml.kernel.org/r/20131113151718.GN21461@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

Fixes a boot failure for me, thanks.
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