sched: Avoid going ahead if ->cpus_allowed is not changed

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index b8b9a7d..70bec4f 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5946,13 +5946,15 @@ int set_cpus_allowed_ptr(struct task_struct *p, const struct cpumask *new_mask)
 
        rq = task_rq_lock(p, &flags);
 
+       if (cpumask_equal(&p->cpus_allowed, new_mask))
+               goto out;
+
        if (!cpumask_intersects(new_mask, cpu_active_mask)) {
                ret = -EINVAL;
                goto out;
        }
 
-       if (unlikely((p->flags & PF_THREAD_BOUND) && p != current &&
-                    !cpumask_equal(&p->cpus_allowed, new_mask))) {
+       if (unlikely((p->flags & PF_THREAD_BOUND) && p != current)) {
                ret = -EINVAL;
                goto out;
        }