[tip: timers/ptp] timekeeping: Cleanup kernel doc of __ktime_get_real_seconds()

[tip-bot2 for Thomas Gleixner]

The following commit has been merged into the timers/ptp branch of tip:

Commit-ID:     506a54a0316ee4854b0ed113a8001477f5211d50
Gitweb:        https://git.kernel.org/tip/506a54a0316ee4854b0ed113a8001477f5211d50
Author:        Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate:    Mon, 19 May 2025 10:33:16 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Thu, 19 Jun 2025 14:28:22 +02:00

timekeeping: Cleanup kernel doc of __ktime_get_real_seconds()



Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: John Stultz <jstultz@xxxxxxxxxx>
Link: https://lore.kernel.org/all/20250519083025.715836017@xxxxxxxxxxxxx

---
 kernel/time/timekeeping.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index 2ad78fb..d88d19f 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)
 {