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kernel/sched/: remove caller signal_pending branch predictions

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This is already done for us internally by the signal machinery.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Davidlohr Bueso <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Davidlohr Bueso authored and Linus Torvalds committed 2019-01-04 13:13:48 -08:00
1 parent 3bb5f4ac55
commit 34ec35ad8f
3 files changed
+3 -3
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kernel/sched/core.c
+1 -1
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@@ -3416,7 +3416,7 @@ static void __sched notrace __schedule(bool preempt)
switch_count = &prev->nivcsw;
if (!preempt && prev->state) {
if (unlikely(signal_pending_state(prev->state, prev))) {
if (signal_pending_state(prev->state, prev)) {
prev->state = TASK_RUNNING;
} else {
deactivate_task(rq, prev, DEQUEUE_SLEEP | DEQUEUE_NOCLOCK);
kernel/sched/swait.c
+1 -1
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@@ -93,7 +93,7 @@ long prepare_to_swait_event(struct swait_queue_head *q, struct swait_queue *wait
long ret = 0;
raw_spin_lock_irqsave(&q->lock, flags);
if (unlikely(signal_pending_state(state, current))) {
if (signal_pending_state(state, current)) {
/*
* See prepare_to_wait_event(). TL;DR, subsequent swake_up_one()
* must not see us.
kernel/sched/wait.c
+1 -1
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@@ -264,7 +264,7 @@ long prepare_to_wait_event(struct wait_queue_head *wq_head, struct wait_queue_en
long ret = 0;
spin_lock_irqsave(&wq_head->lock, flags);
if (unlikely(signal_pending_state(state, current))) {
if (signal_pending_state(state, current)) {
/*
* Exclusive waiter must not fail if it was selected by wakeup,
* it should "consume" the condition we were waiting for.