[tip:sched/core] sched: Remove WARN_ON(!sd) from init_sched_groups_power()

[tip-bot for Viresh Kumar]

Commit-ID:  94c95ba69f31e435416988ddb223c92e5b0e9e83
Gitweb:     http://git.kernel.org/tip/94c95ba69f31e435416988ddb223c92e5b0e9e83
Author:     Viresh Kumar <viresh.kumar@xxxxxxxxxx>
AuthorDate: Tue, 11 Jun 2013 16:32:45 +0530
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 19 Jun 2013 12:58:47 +0200

sched: Remove WARN_ON(!sd) from init_sched_groups_power()

sd can't be NULL in init_sched_groups_power() and so checking it for NULL isn't
useful. In case it is required, then also we need to rearrange the code a bit as
we already accessed invalid pointer sd to get sg: sg = sd->groups.

Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/2bbe633cd74b431c05253a8ce61fdfd5066a531b.1370948150.git.viresh.kumar@xxxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/sched/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 014c97f..21b1403 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -5400,7 +5400,7 @@ static void init_sched_groups_power(int cpu, struct sched_domain *sd)
 {
 	struct sched_group *sg = sd->groups;
 
-	WARN_ON(!sd || !sg);
+	WARN_ON(!sg);
 
 	do {
 		sg->group_weight = cpumask_weight(sched_group_cpus(sg));
--
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