leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

timekeeping: Mark NMI safe time accessors as notrace

Browse Source 
Mark the CLOCK_MONOTONIC fast time accessors as notrace. These functions are
used in tracing to retrieve timestamps, so they should not recurse.

Fixes: 4498e7467e ("time: Parametrize all tk_fast_mono users")
Fixes: f09cb9a180 ("time: Introduce tk_fast_raw")
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20220426175338.3807ca4f@gandalf.local.home/
Link: https://lore.kernel.org/r/20220428062432.61063-1-kurt@linutronix.de
This commit is contained in:
Kurt Kanzenbach 2022-04-28 08:24:32 +02:00 committed by Thomas Gleixner
parent 214cab6f80
commit 2c33d775ef
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
kernel/time/timekeeping.c
View File

@ -482,7 +482,7 @@ static __always_inline u64 __ktime_get_fast_ns(struct tk_fast *tkf)
* of the following timestamps. Callers need to be aware of that and
* deal with it.
*/
u64 ktime_get_mono_fast_ns(void)
u64 notrace ktime_get_mono_fast_ns(void)
{
return __ktime_get_fast_ns(&tk_fast_mono);
}
@ -494,7 +494,7 @@ EXPORT_SYMBOL_GPL(ktime_get_mono_fast_ns);
* Contrary to ktime_get_mono_fast_ns() this is always correct because the
* conversion factor is not affected by NTP/PTP correction.
*/
u64 ktime_get_raw_fast_ns(void)
u64 notrace ktime_get_raw_fast_ns(void)
{
return __ktime_get_fast_ns(&tk_fast_raw);
}