sched/core: Remove unnecessary NULL-pointer check

Checking if the sched_domain pointer returned by sd_init() is NULL seems
pointless as sd_init() neither checks if it is valid to begin with nor
set it to NULL.

Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dietmar.eggemann@arm.com
Cc: freedom.tan@mediatek.com
Cc: keita.kobayashi.ym@renesas.com
Cc: mgalbraith@suse.de
Cc: sgurrappadi@nvidia.com
Cc: vincent.guittot@linaro.org
Cc: yuyang.du@intel.com
Link: http://lkml.kernel.org/r/1469453670-2660-5-git-send-email-morten.rasmussen@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/core.c

@@ -6854,8 +6854,6 @@ struct sched_domain *build_sched_domain(struct sched_domain_topology_level *tl,
 		struct sched_domain *child, int cpu)
 {
 	struct sched_domain *sd = sd_init(tl, cpu);
-	if (!sd)
-		return child;
 
 	cpumask_and(sched_domain_span(sd), cpu_map, tl->mask(cpu));
 	if (child) {