forked from ~ljy/RK356X_SDK_RELEASE

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hc
2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/kernel/locking/mutex.c
....@@ -568,9 +568,16 @@
568568 			 struct ww_acquire_ctx *ww_ctx, struct mutex_waiter *waiter)
569569 {
570570 	bool ret = true;
571
+	int cnt = 0;
572
+	bool time_out = false;
571573 
572574 	rcu_read_lock();
573575 	while (__mutex_owner(lock) == owner) {
576
+		trace_android_vh_mutex_opt_spin_start(lock, &time_out, &cnt);
577
+		if (time_out) {
578
+			ret = false;
579
+			break;
580
+		}
574581 		/*
575582 		 * Ensure we emit the owner->on_cpu, dereference _after_
576583 		 * checking lock->owner still matches owner. If that fails,
....@@ -621,6 +628,7 @@
621628 	if (owner)
622629 		retval = owner->on_cpu && !vcpu_is_preempted(task_cpu(owner));
623630 	rcu_read_unlock();
631
+	trace_android_vh_mutex_can_spin_on_owner(lock, &retval);
624632 
625633 	/*
626634 	 * If lock->owner is not set, the mutex has been released. Return true
....@@ -702,6 +710,7 @@
702710 	if (!waiter)
703711 		osq_unlock(&lock->osq);
704712 
713
+	trace_android_vh_mutex_opt_spin_finish(lock, true);
705714 	return true;
706715 
707716 
....@@ -710,6 +719,7 @@
710719 		osq_unlock(&lock->osq);
711720 
712721 fail:
722
+	trace_android_vh_mutex_opt_spin_finish(lock, false);
713723 	/*
714724 	 * If we fell out of the spin path because of need_resched(),
715725 	 * reschedule now, before we try-lock the mutex. This avoids getting
....@@ -750,12 +760,14 @@
750760  */
751761 void __sched mutex_unlock(struct mutex *lock)
752762 {
753
-	trace_android_vh_record_mutex_lock_starttime(current, 0);
754763 #ifndef CONFIG_DEBUG_LOCK_ALLOC
755
-	if (__mutex_unlock_fast(lock))
764
+	if (__mutex_unlock_fast(lock)) {
765
+		trace_android_vh_record_mutex_lock_starttime(current, 0);
756766 		return;
767
+	}
757768 #endif
758769 	__mutex_unlock_slowpath(lock, _RET_IP_);
770
+	trace_android_vh_record_mutex_lock_starttime(current, 0);
759771 }
760772 EXPORT_SYMBOL(mutex_unlock);
761773