[PATCH] time/tracing: Make jiffies_64_to_clock_t() notrace

[PATCH] time/tracing: Make jiffies_64_to_clock_t() notrace

[Steven Rostedt]

From: Steven Rostedt <rostedt@goodmis.org>

The trace_clock_jiffies() function that handles the "uptime" clock for
tracing calls jiffies_64_to_clock_t(). This causes the function tracer to
constantly recurse when the tracing clock is set to "uptime". Mark it
notrace to prevent unnecessary recursion when using the "uptime" clock.

Fixes: 58d4e21e50ff3 ("tracing: Fix wraparound problems in "uptime" trace clock")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---
 kernel/time/time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/time.c b/kernel/time/time.c
index 36fd2313ae7e..0d832317d576 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -697,7 +697,7 @@ EXPORT_SYMBOL(clock_t_to_jiffies);
  *
  * Return: jiffies_64 value converted to 64-bit "clock_t" (CLOCKS_PER_SEC)
  */
-u64 jiffies_64_to_clock_t(u64 x)
+notrace u64 jiffies_64_to_clock_t(u64 x)
 {
 #if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0
 # if HZ < USER_HZ
-- 
2.51.0

[tip: timers/urgent] time/jiffies: Mark jiffies_64_to_clock_t() notrace

[tip-bot2 for Steven Rostedt]

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

Commit-ID:     755a648e78f12574482d4698d877375793867fa1
Gitweb:        https://git.kernel.org/tip/755a648e78f12574482d4698d877375793867fa1
Author:        Steven Rostedt <rostedt@goodmis.org>
AuthorDate:    Fri, 06 Mar 2026 21:24:03 -05:00
Committer:     Thomas Gleixner <tglx@kernel.org>
CommitterDate: Wed, 11 Mar 2026 10:33:12 +01:00

time/jiffies: Mark jiffies_64_to_clock_t() notrace

The trace_clock_jiffies() function that handles the "uptime" clock for
tracing calls jiffies_64_to_clock_t(). This causes the function tracer to
constantly recurse when the tracing clock is set to "uptime". Mark it
notrace to prevent unnecessary recursion when using the "uptime" clock.

Fixes: 58d4e21e50ff3 ("tracing: Fix wraparound problems in "uptime" trace clock")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260306212403.72270bb2@robin
---
 kernel/time/time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/time.c b/kernel/time/time.c
index 36fd231..0d83231 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -697,7 +697,7 @@ EXPORT_SYMBOL(clock_t_to_jiffies);
  *
  * Return: jiffies_64 value converted to 64-bit "clock_t" (CLOCKS_PER_SEC)
  */
-u64 jiffies_64_to_clock_t(u64 x)
+notrace u64 jiffies_64_to_clock_t(u64 x)
 {
 #if (TICK_NSEC % (NSEC_PER_SEC / USER_HZ)) == 0
 # if HZ < USER_HZ