int kblockd_schedule_work(struct request_queue *q, struct work_struct *work);
#ifdef CONFIG_BLK_CGROUP
+/*
+ * This should not be using sched_clock(). A real patch is in progress
+ * to fix this up, until that is in place we need to disable preemption
+ * around sched_clock() in this function and set_io_start_time_ns().
+ */
static inline void set_start_time_ns(struct request *req)
{
+ preempt_disable();
req->start_time_ns = sched_clock();
+ preempt_enable();
}
static inline void set_io_start_time_ns(struct request *req)
{
+ preempt_disable();
req->io_start_time_ns = sched_clock();
+ preempt_enable();
}
static inline uint64_t rq_start_time_ns(struct request *req)