prev_wait_start 876 kernel/sched/fair.c u64 wait_start, prev_wait_start; prev_wait_start 882 kernel/sched/fair.c prev_wait_start = schedstat_val(se->statistics.wait_start); prev_wait_start 885 kernel/sched/fair.c likely(wait_start > prev_wait_start)) prev_wait_start 886 kernel/sched/fair.c wait_start -= prev_wait_start;