Merge branch 'linus' into perfcounters/core

Conflicts:
	arch/x86/kernel/acpi/boot.c

1 files changed, 11 insertions, 16 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 0952931ca7f6..83b68ff6df80 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2311,16 +2311,6 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
         if (!sched_feat(SYNC_WAKEUPS))
                 sync = 0;
 
-        if (!sync) {
-                if (current->se.avg_overlap < sysctl_sched_migration_cost &&
-                          p->se.avg_overlap < sysctl_sched_migration_cost)
-                        sync = 1;
-        } else {
-                if (current->se.avg_overlap >= sysctl_sched_migration_cost ||
-                          p->se.avg_overlap >= sysctl_sched_migration_cost)
-                        sync = 0;
-        }
-
 #ifdef CONFIG_SMP
         if (sched_feat(LB_WAKEUP_UPDATE)) {
                 struct sched_domain *sd;
@@ -3952,19 +3942,24 @@ int select_nohz_load_balancer(int stop_tick)
         int cpu = smp_processor_id();
 
         if (stop_tick) {
-                cpumask_set_cpu(cpu, nohz.cpu_mask);
                 cpu_rq(cpu)->in_nohz_recently = 1;
 
-                /*
-                 * If we are going offline and still the leader, give up!
-                 */
-                if (!cpu_active(cpu) &&
-                    atomic_read(&nohz.load_balancer) == cpu) {
+                if (!cpu_active(cpu)) {
+                        if (atomic_read(&nohz.load_balancer) != cpu)
+                                return 0;
+
+                        /*
+                         * If we are going offline and still the leader,
+                         * give up!
+                         */
                         if (atomic_cmpxchg(&nohz.load_balancer, cpu, -1) != cpu)
                                 BUG();
+
                         return 0;
                 }
 
+                cpumask_set_cpu(cpu, nohz.cpu_mask);
+
                 /* time for ilb owner also to sleep */
                 if (cpumask_weight(nohz.cpu_mask) == num_online_cpus()) {
                         if (atomic_read(&nohz.load_balancer) == cpu)