112  * Update expiry time from increment, and increase overrun count,
144 /* Check whether all cache entries contain U64_MAX, i.e. eternal expiry time */
261  * Called from sys_getitimer() to calculate the expiry time of an active
301 		 * The POSIX timer interface allows for absolute time expiry  in thread_group_start_cputime()
393 	 * If posix timer expiry is handled in task work context then  in posix_cpu_timer_create()
396 	 * lock class key otherwise regular posix timer expiry would record  in posix_cpu_timer_create()
660 	 * Disarm any old timer after extracting its expiry time.  in posix_cpu_timer_set()
676 	 * timer, we need a sample to balance the thread expiry  in posix_cpu_timer_set()
725 	 * Install the new expiry time (or zero).  in posix_cpu_timer_set()
803 	 * Sample the clock to take the difference with the expiry time.  in posix_cpu_timer_get()
1024 		/* Update the expiry cache */  in check_process_timers()
1058 	 * Fetch the current sample and update the timer's expiry time.  in posix_cpu_timer_rearm()
1068 	 * Now re-arm for the new expiry time.  in posix_cpu_timer_rearm()
1124 	 * no other thread in the group is already handling expiry for  in fastpath_timer_check()
1128 	 * acquire the sighand lock to handle timer expiry.  in fastpath_timer_check()
1277 		 * The above timer checks have updated the expiry cache and  in handle_posix_cpu_timers()
1283 		 * If timer expiry runs in the timer interrupt context then  in handle_posix_cpu_timers()
1289 		 * If timer expiry is deferred to task work context then  in handle_posix_cpu_timers()
1302 		 *   expiry checks. posix_cpu_timers_enable_work() takes  in handle_posix_cpu_timers()
1303 		 *   care of that and eventually lets the expiry checks  in handle_posix_cpu_timers()
1329 		 * expiry context. If expiry happens in hard interrupt  in handle_posix_cpu_timers()
1361 	 * If the actual expiry is deferred to task work context and the  in run_posix_cpu_timers()
1413 	 * expiry cache is also used by RLIMIT_CPU!.  in set_process_cpu_timer()