linux-kernel - [tip: timers/core] time/sched_clock: Use ACCESS

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Message-ID: <176832451368.510.9081222014514031930.tip-bot2@tip-bot2>
Date: Tue, 13 Jan 2026 17:15:13 -0000
From: "tip-bot2 for Thomas Gleixner" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: kernel test robot <lkp@...el.com>, Thomas Gleixner <tglx@...nel.org>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: timers/core] time/sched_clock: Use ACCESS_PRIVATE() to evaluate
 hrtimer::function

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

Commit-ID:     3db5306b0bd562ac0fe7eddad26c60ebb6f5fdd4
Gitweb:        https://git.kernel.org/tip/3db5306b0bd562ac0fe7eddad26c60ebb6f5fdd4
Author:        Thomas Gleixner <tglx@...nel.org>
AuthorDate:    Tue, 13 Jan 2026 17:47:37 +01:00
Committer:     Thomas Gleixner <tglx@...nel.org>
CommitterDate: Tue, 13 Jan 2026 18:08:57 +01:00

time/sched_clock: Use ACCESS_PRIVATE() to evaluate hrtimer::function

This dereference of sched_clock_timer::function was missed when the
hrtimer callback function pointer was marked private.

Fixes: 04257da0c99c ("hrtimers: Make callback function pointer private")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Thomas Gleixner <tglx@...nel.org>
Link: https://patch.msgid.link/875x95jw7q.ffs@tglx
Closes: https://lore.kernel.org/oe-kbuild-all/202601131713.KsxhXQ0M-lkp@intel.com/
---
 kernel/time/sched_clock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c
index f391118..f3aaef6 100644
--- a/kernel/time/sched_clock.c
+++ b/kernel/time/sched_clock.c
@@ -215,7 +215,7 @@ void sched_clock_register(u64 (*read)(void), int bits, unsigned long rate)
 
 	update_clock_read_data(&rd);
 
-	if (sched_clock_timer.function != NULL) {
+	if (ACCESS_PRIVATE(&sched_clock_timer, function) != NULL) {
 		/* update timeout for clock wrap */
 		hrtimer_start(&sched_clock_timer, cd.wrap_kt,
 			      HRTIMER_MODE_REL_HARD);