diff options
| author | franciscofranco <franciscofranco.1990@gmail.com> | 2015-12-05 04:01:17 +0000 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-12-25 16:11:14 +0100 |
| commit | 2d6a958ab8f0aaa9c20738a0ac22ba94ae000362 (patch) | |
| tree | 1c2fafd423477f54ef91480567b8937d9a5215dc /kernel/sched | |
| parent | e5a41b03c4e0a299623929f41a3a1e17fa82076a (diff) | |
arm64: use the new *_relaxed macros for lower power usage
Signed-off-by: franciscofranco <franciscofranco.1990@gmail.com>
Signed-off-by: Joe Maples <joe@frap129.org>
Signed-off-by: Mister Oyster <oysterized@gmail.com>
Diffstat (limited to 'kernel/sched')
| -rw-r--r-- | kernel/sched/core.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index c6d3219b1..265f8359e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1271,9 +1271,10 @@ unsigned long wait_task_inactive(struct task_struct *p, long match_state) * is actually now running somewhere else! */ while (task_running(rq, p)) { - if (match_state && unlikely(p->state != match_state)) + if (match_state && unlikely(cpu_relaxed_read_long + (&(p->state)) != match_state)) return 0; - cpu_relax(); + cpu_read_relax(); } /* @@ -1603,7 +1604,7 @@ enum ipi_msg_type { }; void scheduler_ipi(void) { - if (llist_empty(&this_rq()->wake_list) + if (llist_empty_relaxed(&this_rq()->wake_list) && !tick_nohz_full_cpu(smp_processor_id()) && !got_nohz_idle_kick()){ mt_trace_ISR_start(IPI_RESCHEDULE); @@ -1753,8 +1754,8 @@ try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags) * If the owning (remote) cpu is still in the middle of schedule() with * this task as prev, wait until its done referencing the task. */ - while (p->on_cpu) - cpu_relax(); + while (cpu_relaxed_read(&(p->on_cpu))) + cpu_read_relax(); /* * Pairs with the smp_wmb() in finish_lock_switch(). */ @@ -4261,7 +4262,7 @@ int idle_cpu(int cpu) return 0; #ifdef CONFIG_SMP - if (!llist_empty(&rq->wake_list)) + if (!llist_empty_relaxed(&rq->wake_list)) return 0; #endif |