119  * Update expiry time from increment, and increase overrun count,
151 /* Check whether all cache entries contain U64_MAX, i.e. eternal expiry time */
267  * Called from sys_getitimer() to calculate the expiry time of an active
307 		 * The POSIX timer interface allows for absolute time expiry  in thread_group_start_cputime()
399 	 * If posix timer expiry is handled in task work context then  in posix_cpu_timer_create()
402 	 * lock class key otherwise regular posix timer expiry would record  in posix_cpu_timer_create()
666 	 * Disarm any old timer after extracting its expiry time.  in posix_cpu_timer_set()
682 	 * timer, we need a sample to balance the thread expiry  in posix_cpu_timer_set()
731 	 * Install the new expiry time (or zero).  in posix_cpu_timer_set()
809 	 * Sample the clock to take the difference with the expiry time.  in posix_cpu_timer_get()
1032 		/* Update the expiry cache */  in check_process_timers()
1066 	 * Fetch the current sample and update the timer's expiry time.  in posix_cpu_timer_rearm()
1076 	 * Now re-arm for the new expiry time.  in posix_cpu_timer_rearm()
1132 	 * no other thread in the group is already handling expiry for  in fastpath_timer_check()
1136 	 * acquire the sighand lock to handle timer expiry.  in fastpath_timer_check()
1182 	/* Has the handling task completed expiry already? */  in posix_cpu_timer_wait_running()
1190 	/* Wait on the expiry mutex */  in posix_cpu_timer_wait_running()
1355 		 * The above timer checks have updated the expiry cache and  in handle_posix_cpu_timers()
1361 		 * If timer expiry runs in the timer interrupt context then  in handle_posix_cpu_timers()
1367 		 * If timer expiry is deferred to task work context then  in handle_posix_cpu_timers()
1380 		 *   expiry checks. posix_cpu_timers_enable_work() takes  in handle_posix_cpu_timers()
1381 		 *   care of that and eventually lets the expiry checks  in handle_posix_cpu_timers()
1407 		 * expiry context. If expiry happens in hard interrupt  in handle_posix_cpu_timers()
1441 	 * If the actual expiry is deferred to task work context and the  in run_posix_cpu_timers()
1493 	 * expiry cache is also used by RLIMIT_CPU!.  in set_process_cpu_timer()