58 static void iot_init(struct io_tracker *iot)  in iot_init()  argument
60 	spin_lock_init(&iot->lock);  in iot_init()
61 	iot->in_flight = 0ul;  in iot_init()
62 	iot->idle_time = 0ul;  in iot_init()
63 	iot->last_update_time = jiffies;  in iot_init()
66 static bool __iot_idle_for(struct io_tracker *iot, unsigned long jifs)  in __iot_idle_for()  argument
68 	if (iot->in_flight)  in __iot_idle_for()
71 	return time_after(jiffies, iot->idle_time + jifs);  in __iot_idle_for()
74 static bool iot_idle_for(struct io_tracker *iot, unsigned long jifs)  in iot_idle_for()  argument
78 	spin_lock_irq(&iot->lock);  in iot_idle_for()
79 	r = __iot_idle_for(iot, jifs);  in iot_idle_for()
80 	spin_unlock_irq(&iot->lock);  in iot_idle_for()
85 static void iot_io_begin(struct io_tracker *iot, sector_t len)  in iot_io_begin()  argument
87 	spin_lock_irq(&iot->lock);  in iot_io_begin()
88 	iot->in_flight += len;  in iot_io_begin()
89 	spin_unlock_irq(&iot->lock);  in iot_io_begin()
92 static void __iot_io_end(struct io_tracker *iot, sector_t len)  in __iot_io_end()  argument
97 	iot->in_flight -= len;  in __iot_io_end()
98 	if (!iot->in_flight)  in __iot_io_end()
99 		iot->idle_time = jiffies;  in __iot_io_end()
102 static void iot_io_end(struct io_tracker *iot, sector_t len)  in iot_io_end()  argument
106 	spin_lock_irqsave(&iot->lock, flags);  in iot_io_end()
107 	__iot_io_end(iot, len);  in iot_io_end()
108 	spin_unlock_irqrestore(&iot->lock, flags);  in iot_io_end()