diff options
| -rw-r--r-- | kernel/time/timekeeping.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 2ad78fbdc9ff..d88d19fb794c 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -975,9 +975,14 @@ time64_t ktime_get_real_seconds(void) EXPORT_SYMBOL_GPL(ktime_get_real_seconds); /** - * __ktime_get_real_seconds - The same as ktime_get_real_seconds - * but without the sequence counter protect. This internal function - * is called just when timekeeping lock is already held. + * __ktime_get_real_seconds - Unprotected access to CLOCK_REALTIME seconds + * + * The same as ktime_get_real_seconds() but without the sequence counter + * protection. This function is used in restricted contexts like the x86 MCE + * handler and in KGDB. It's unprotected on 32-bit vs. concurrent half + * completed modification and only to be used for such critical contexts. + * + * Returns: Racy snapshot of the CLOCK_REALTIME seconds value */ noinstr time64_t __ktime_get_real_seconds(void) { |