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@intel.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/875x95jw7q.ffs@tglx
Closes: https://lore.kernel.org/oe-kbuild-all/202601131713.KsxhXQ0M-lkp@intel.com/

diff --git a/kernel/time/sched_clock.c b/kernel/time/sched_clock.c
index f39111830ca3636e7f345bdf83d5507d3c6ebbd4..f3aaef695b8cdb21e6335e2ab47fb99319f869c6 100644 (file)
--- 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);