sched: Create for_each_sd_topology()

For loop for traversing sched_domain_topology was used at multiple placed in
core.c. This patch removes code redundancy by creating for_each_sd_topology().
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/e0e04542f54e9464bd9da54f5ccfe62ec6c4c0bc.1370861520.git.viresh.kumar@linaro.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>

kernel/sched/core.c

@@ -5565,6 +5565,9 @@ static struct sched_domain_topology_level default_topology[] = {
 
 static struct sched_domain_topology_level *sched_domain_topology = default_topology;
 
+#define for_each_sd_topology(tl)			\
+	for (tl = sched_domain_topology; tl->init; tl++)
+
 #ifdef CONFIG_NUMA
 
 static int sched_domains_numa_levels;
@@ -5862,7 +5865,7 @@ static int __sdt_alloc(const struct cpumask *cpu_map)
 	struct sched_domain_topology_level *tl;
 	int j;
 
-	for (tl = sched_domain_topology; tl->init; tl++) {
+	for_each_sd_topology(tl) {
 		struct sd_data *sdd = &tl->data;
 
 		sdd->sd = alloc_percpu(struct sched_domain *);
@@ -5915,7 +5918,7 @@ static void __sdt_free(const struct cpumask *cpu_map)
 	struct sched_domain_topology_level *tl;
 	int j;
 
-	for (tl = sched_domain_topology; tl->init; tl++) {
+	for_each_sd_topology(tl) {
 		struct sd_data *sdd = &tl->data;
 
 		for_each_cpu(j, cpu_map) {
@@ -5983,7 +5986,7 @@ static int build_sched_domains(const struct cpumask *cpu_map,
 		struct sched_domain_topology_level *tl;
 
 		sd = NULL;
-		for (tl = sched_domain_topology; tl->init; tl++) {
+		for_each_sd_topology(tl) {
 			sd = build_sched_domain(tl, cpu_map, attr, sd, i);
 			if (tl == sched_domain_topology)
 				*per_cpu_ptr(d.sd, i) = sd;