78 		struct task_struct *tsk = pid_task(pid, PIDTYPE_PID);  in pid_for_clock()  local
79 		return (tsk && same_thread_group(tsk, current)) ? pid : NULL;  in pid_for_clock()
273 void thread_group_sample_cputime(struct task_struct *tsk, u64 *samples)  in thread_group_sample_cputime()  argument
275 	struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;  in thread_group_sample_cputime()
276 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;  in thread_group_sample_cputime()
295 static void thread_group_start_cputime(struct task_struct *tsk, u64 *samples)  in thread_group_start_cputime()  argument
297 	struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;  in thread_group_start_cputime()
298 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;  in thread_group_start_cputime()
300 	lockdep_assert_task_sighand_held(tsk);  in thread_group_start_cputime()
311 		thread_group_cputime(tsk, &sum);  in thread_group_start_cputime()
326 static void __thread_group_cputime(struct task_struct *tsk, u64 *samples)  in __thread_group_cputime()  argument
330 	thread_group_cputime(tsk, &ct);  in __thread_group_cputime()
361 	struct task_struct *tsk;  in posix_cpu_clock_get()  local
365 	tsk = pid_task(pid_for_clock(clock, true), clock_pid_type(clock));  in posix_cpu_clock_get()
366 	if (!tsk) {  in posix_cpu_clock_get()
372 		t = cpu_clock_sample(clkid, tsk);  in posix_cpu_clock_get()
374 		t = cpu_clock_sample_group(clkid, tsk, false);  in posix_cpu_clock_get()
417 					      struct task_struct *tsk)  in timer_base()  argument
422 		return tsk->posix_cputimers.bases + clkidx;  in timer_base()
424 		return tsk->signal->posix_cputimers.bases + clkidx;  in timer_base()
434 					struct task_struct *tsk)  in trigger_base_recalc_expires()  argument
436 	struct posix_cputimer_base *base = timer_base(timer, tsk);  in trigger_base_recalc_expires()
543 void posix_cpu_timers_exit(struct task_struct *tsk)  in posix_cpu_timers_exit()  argument
545 	cleanup_timers(&tsk->posix_cputimers);  in posix_cpu_timers_exit()
547 void posix_cpu_timers_exit_group(struct task_struct *tsk)  in posix_cpu_timers_exit_group()  argument
549 	cleanup_timers(&tsk->signal->posix_cputimers);  in posix_cpu_timers_exit_group()
870 static inline void check_dl_overrun(struct task_struct *tsk)  in check_dl_overrun()  argument
872 	if (tsk->dl.dl_overrun) {  in check_dl_overrun()
873 		tsk->dl.dl_overrun = 0;  in check_dl_overrun()
874 		send_signal_locked(SIGXCPU, SEND_SIG_PRIV, tsk, PIDTYPE_TGID);  in check_dl_overrun()
897 static void check_thread_timers(struct task_struct *tsk,  in check_thread_timers()  argument
900 	struct posix_cputimers *pct = &tsk->posix_cputimers;  in check_thread_timers()
904 	if (dl_task(tsk))  in check_thread_timers()
905 		check_dl_overrun(tsk);  in check_thread_timers()
910 	task_sample_cputime(tsk, samples);  in check_thread_timers()
916 	soft = task_rlimit(tsk, RLIMIT_RTTIME);  in check_thread_timers()
919 		unsigned long rttime = tsk->rt.timeout * (USEC_PER_SEC / HZ);  in check_thread_timers()
920 		unsigned long hard = task_rlimit_max(tsk, RLIMIT_RTTIME);  in check_thread_timers()
930 			tsk->signal->rlim[RLIMIT_RTTIME].rlim_cur = soft;  in check_thread_timers()
935 		tick_dep_clear_task(tsk, TICK_DEP_BIT_POSIX_TIMER);  in check_thread_timers()
947 static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,  in check_cpu_itimer()  argument
961 				    task_tgid(tsk), cur_time);  in check_cpu_itimer()
962 		send_signal_locked(signo, SEND_SIG_PRIV, tsk, PIDTYPE_TGID);  in check_cpu_itimer()
974 static void check_process_timers(struct task_struct *tsk,  in check_process_timers()  argument
977 	struct signal_struct *const sig = tsk->signal;  in check_process_timers()
1006 	check_cpu_itimer(tsk, &sig->it[CPUCLOCK_PROF],  in check_process_timers()
1009 	check_cpu_itimer(tsk, &sig->it[CPUCLOCK_VIRT],  in check_process_timers()
1013 	soft = task_rlimit(tsk, RLIMIT_CPU);  in check_process_timers()
1016 		unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU);  in check_process_timers()
1115 static inline bool fastpath_timer_check(struct task_struct *tsk)  in fastpath_timer_check()  argument
1117 	struct posix_cputimers *pct = &tsk->posix_cputimers;  in fastpath_timer_check()
1123 		task_sample_cputime(tsk, samples);  in fastpath_timer_check()
1128 	sig = tsk->signal;  in fastpath_timer_check()
1155 	if (dl_task(tsk) && tsk->dl.dl_overrun)  in fastpath_timer_check()
1161 static void handle_posix_cpu_timers(struct task_struct *tsk);
1180 	struct task_struct *tsk = rcu_dereference(timr->it.cpu.handling);  in posix_cpu_timer_wait_running()  local
1183 	if (!tsk)  in posix_cpu_timer_wait_running()
1187 	get_task_struct(tsk);  in posix_cpu_timer_wait_running()
1191 	mutex_lock(&tsk->posix_cputimers_work.mutex);  in posix_cpu_timer_wait_running()
1193 	mutex_unlock(&tsk->posix_cputimers_work.mutex);  in posix_cpu_timer_wait_running()
1195 	put_task_struct(tsk);  in posix_cpu_timer_wait_running()
1243 static inline bool posix_cpu_timers_work_scheduled(struct task_struct *tsk)  in posix_cpu_timers_work_scheduled()  argument
1245 	return tsk->posix_cputimers_work.scheduled;  in posix_cpu_timers_work_scheduled()
1248 static inline void __run_posix_cpu_timers(struct task_struct *tsk)  in __run_posix_cpu_timers()  argument
1250 	if (WARN_ON_ONCE(tsk->posix_cputimers_work.scheduled))  in __run_posix_cpu_timers()
1254 	tsk->posix_cputimers_work.scheduled = true;  in __run_posix_cpu_timers()
1255 	task_work_add(tsk, &tsk->posix_cputimers_work.work, TWA_RESUME);  in __run_posix_cpu_timers()
1258 static inline bool posix_cpu_timers_enable_work(struct task_struct *tsk,  in posix_cpu_timers_enable_work()  argument
1269 		tsk->posix_cputimers_work.scheduled = false;  in posix_cpu_timers_enable_work()
1287 	if (start != jiffies && fastpath_timer_check(tsk))  in posix_cpu_timers_enable_work()
1290 		tsk->posix_cputimers_work.scheduled = false;  in posix_cpu_timers_enable_work()
1296 static inline void __run_posix_cpu_timers(struct task_struct *tsk)  in __run_posix_cpu_timers()  argument
1299 	handle_posix_cpu_timers(tsk);  in __run_posix_cpu_timers()
1315 static inline bool posix_cpu_timers_work_scheduled(struct task_struct *tsk)  in posix_cpu_timers_work_scheduled()  argument
1320 static inline bool posix_cpu_timers_enable_work(struct task_struct *tsk,  in posix_cpu_timers_enable_work()  argument
1327 static void handle_posix_cpu_timers(struct task_struct *tsk)  in handle_posix_cpu_timers()  argument
1333 	if (!lock_task_sighand(tsk, &flags))  in handle_posix_cpu_timers()
1350 		check_thread_timers(tsk, &firing);  in handle_posix_cpu_timers()
1352 		check_process_timers(tsk, &firing);  in handle_posix_cpu_timers()
1384 	} while (!posix_cpu_timers_enable_work(tsk, start));  in handle_posix_cpu_timers()
1394 	unlock_task_sighand(tsk, &flags);  in handle_posix_cpu_timers()
1436 	struct task_struct *tsk = current;  in run_posix_cpu_timers()  local
1444 	if (posix_cpu_timers_work_scheduled(tsk))  in run_posix_cpu_timers()
1451 	if (!fastpath_timer_check(tsk))  in run_posix_cpu_timers()
1454 	__run_posix_cpu_timers(tsk);  in run_posix_cpu_timers()
1461 void set_process_cpu_timer(struct task_struct *tsk, unsigned int clkid,  in set_process_cpu_timer()  argument
1469 	nextevt = &tsk->signal->posix_cputimers.bases[clkid].nextevt;  in set_process_cpu_timer()
1470 	now = cpu_clock_sample_group(clkid, tsk, true);  in set_process_cpu_timer()
1498 	tick_dep_set_signal(tsk, TICK_DEP_BIT_POSIX_TIMER);  in set_process_cpu_timer()