diff options
Diffstat (limited to 'kernel/time/tick-sched.c')
| -rw-r--r-- | kernel/time/tick-sched.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 466e083c8272..4f04c621c922 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -766,15 +766,16 @@ static u64 get_cpu_sleep_time_us(struct tick_sched *ts, ktime_t *sleeptime, *last_update_time = ktime_to_us(now); do { + ktime_t delta = 0; + seq = read_seqcount_begin(&ts->idle_sleeptime_seq); if (tick_sched_flag_test(ts, TS_FLAG_IDLE_ACTIVE) && compute_delta) { - ktime_t delta = ktime_sub(now, ts->idle_entrytime); - - idle = ktime_add(*sleeptime, delta); - } else { - idle = *sleeptime; + if (now > ts->idle_entrytime) + delta = ktime_sub(now, ts->idle_entrytime); } + + idle = ktime_add(*sleeptime, delta); } while (read_seqcount_retry(&ts->idle_sleeptime_seq, seq)); return ktime_to_us(idle); |