diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/timekeeping.c | 15 | ||||
| -rw-r--r-- | kernel/time/timer.c | 2 |
2 files changed, 15 insertions, 2 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 4ab9949772d5..8e4b3c32fcf9 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -17,6 +17,7 @@ #include <linux/clocksource.h> #include <linux/jiffies.h> #include <linux/time.h> +#include <linux/timex.h> #include <linux/tick.h> #include <linux/stop_machine.h> #include <linux/pvclock_gtod.h> @@ -2397,6 +2398,20 @@ static int timekeeping_validate_timex(const struct __kernel_timex *txc) return 0; } +/** + * random_get_entropy_fallback - Returns the raw clock source value, + * used by random.c for platforms with no valid random_get_entropy(). + */ +unsigned long random_get_entropy_fallback(void) +{ + struct tk_read_base *tkr = &tk_core.timekeeper.tkr_mono; + struct clocksource *clock = READ_ONCE(tkr->clock); + + if (unlikely(timekeeping_suspended || !clock)) + return 0; + return clock->read(clock); +} +EXPORT_SYMBOL_GPL(random_get_entropy_fallback); /** * do_adjtimex() - Accessor function to NTP __do_adjtimex function diff --git a/kernel/time/timer.c b/kernel/time/timer.c index a0666d948147..717fcb9fb14a 100644 --- a/kernel/time/timer.c +++ b/kernel/time/timer.c @@ -1833,8 +1833,6 @@ void update_process_times(int user_tick) { struct task_struct *p = current; - PRANDOM_ADD_NOISE(jiffies, user_tick, p, 0); - /* Note: this timer irq context must be accounted for as well. */ account_process_tick(p, user_tick); run_local_timers(); |