gcc/testsuite/gcc.c-torture/compile/pr68538.c

   1 struct percpu_counter {
   2         signed long long count;
   3 };
   4 struct blkg_rwstat {
   5         struct percpu_counter cpu_cnt[4];
   6 };
   7 struct cfq_group {
   8         struct blkg_rwstat service_time;
   9 };
  10 struct cfq_queue {
  11         struct cfq_group *group;
  12 };
  13 struct request {
  14         struct cfq_queue *active_queue;
  15         unsigned long long cmd_flags;
  16         void *priv;
  17 };
  18 static void blkg_rwstat_add(struct blkg_rwstat *rwstat, int rw, unsigned long long val)
  19 {
  20         struct percpu_counter *cnt;
  21         if (rw & 1)
  22                 cnt = &rwstat->cpu_cnt[1];
  23         else
  24                 cnt = &rwstat->cpu_cnt[0];
  25         cnt->count += val;
  26         if (rw & 2)
  27                 cnt = &rwstat->cpu_cnt[2];
  28         else
  29                 cnt = &rwstat->cpu_cnt[3];
  30         cnt->count += val;
  31 }
  32 extern unsigned long long rq_start_time_ns(void);
  33 extern unsigned long long rq_io_start_time_ns(void);
  34 extern int rq_is_sync(void);
  35 extern void cfq_arm_slice_timer(void);
  36 void cfq_completed_request(struct request *rq)
  37 {
  38         struct cfq_queue *queue = rq->priv;
  39         int sync = rq_is_sync();
  40         struct cfq_group *group = queue->group;
  41         long long start_time = rq_start_time_ns();
  42         long long io_start_time = rq_io_start_time_ns();
  43         int rw = rq->cmd_flags;
  44
  45         if (io_start_time < 1)
  46                 blkg_rwstat_add(&group->service_time, rw, 1 - io_start_time);
  47         blkg_rwstat_add(0, rw, io_start_time - start_time);
  48
  49         if (rq->active_queue == queue && sync)
  50                 cfq_arm_slice_timer();
  51 }
  52