Linux 6.2/6.15: del_timer_sync() renamed to timer_delete_sync()

Renamed in 6.2, and the compat wrapper removed in 6.15. No signature or
functional change apart from that, so a very minimal update for us.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Pavel Snajdr <snajpa@snajpa.net>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17229
(cherry picked from commit 841be1d049)

module/os/linux/spl/spl-taskq.c

@@ -38,6 +38,11 @@
 #include <sys/kstat.h>
 #include <linux/cpuhotplug.h>
 
+/* Linux 6.2 renamed timer_delete_sync(); point it at its old name for those. */
+#ifndef HAVE_TIMER_DELETE_SYNC
+#define	timer_delete_sync(t)	del_timer_sync(t)
+#endif
+
 typedef struct taskq_kstats {
 	/* static values, for completeness */
 	kstat_named_t tqks_threads_max;
@@ -633,7 +638,7 @@ taskq_cancel_id(taskq_t *tq, taskqid_t id)
 		 */
 		if (timer_pending(&t->tqent_timer)) {
 			spin_unlock_irqrestore(&tq->tq_lock, flags);
-			del_timer_sync(&t->tqent_timer);
+			timer_delete_sync(&t->tqent_timer);
 			spin_lock_irqsave_nested(&tq->tq_lock, flags,
 			    tq->tq_lock_class);
 		}