remove sched notifier for cross-cpu migrations

[firefly-linux-kernel-4.4.55.git] / kernel / sched / core.c

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 0d8eb4525e7616953d1a0df16fd43bcf6fc4f0cc..0efd2eefb027bdb269f2a63629fba4bc2ef8ded3 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -976,13 +976,6 @@ void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags)
                rq->skip_clock_update = 1;
 }
 
-static ATOMIC_NOTIFIER_HEAD(task_migration_notifier);
-
-void register_task_migration_notifier(struct notifier_block *n)
-{
-       atomic_notifier_chain_register(&task_migration_notifier, n);
-}
-
 #ifdef CONFIG_SMP
 void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
 {
@@ -1013,18 +1006,10 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
        trace_sched_migrate_task(p, new_cpu);
 
        if (task_cpu(p) != new_cpu) {
-               struct task_migration_notifier tmn;
-
                if (p->sched_class->migrate_task_rq)
                        p->sched_class->migrate_task_rq(p, new_cpu);
                p->se.nr_migrations++;
                perf_sw_event(PERF_COUNT_SW_CPU_MIGRATIONS, 1, NULL, 0);
-
-               tmn.task = p;
-               tmn.from_cpu = task_cpu(p);
-               tmn.to_cpu = new_cpu;
-
-               atomic_notifier_call_chain(&task_migration_notifier, 0, &tmn);
        }
 
        __set_task_cpu(p, new_cpu);