diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/process.c | 11 | ||||
| -rw-r--r-- | arch/um/kernel/time.c | 12 |
2 files changed, 14 insertions, 9 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index 0fcdc374a9a1..a85c48ac2b27 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -205,13 +205,10 @@ void initial_thread_cb(void (*proc)(void *), void *arg) static void um_idle_sleep(void) { - unsigned long long duration = UM_NSEC_PER_SEC; - - if (time_travel_mode != TT_MODE_OFF) { - time_travel_sleep(duration); - } else { - os_idle_sleep(duration); - } + if (time_travel_mode != TT_MODE_OFF) + time_travel_sleep(); + else + os_idle_sleep(); } void arch_cpu_idle(void) diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c index 8dafc3f2add4..8e8eb8ba04a4 100644 --- a/arch/um/kernel/time.c +++ b/arch/um/kernel/time.c @@ -46,6 +46,9 @@ static void time_travel_set_time(unsigned long long ns) if (unlikely(ns < time_travel_time)) panic("time-travel: time goes backwards %lld -> %lld\n", time_travel_time, ns); + else if (unlikely(ns >= S64_MAX)) + panic("The system was going to sleep forever, aborting"); + time_travel_time = ns; } @@ -399,9 +402,14 @@ static void time_travel_oneshot_timer(struct time_travel_event *e) deliver_alarm(); } -void time_travel_sleep(unsigned long long duration) +void time_travel_sleep(void) { - unsigned long long next = time_travel_time + duration; + /* + * Wait "forever" (using S64_MAX because there are some potential + * wrapping issues, especially with the current TT_MODE_EXTERNAL + * controller application. + */ + unsigned long long next = S64_MAX; if (time_travel_mode == TT_MODE_BASIC) os_timer_disable(); |