71 		struct task_struct *tsk = pid_task(pid, PIDTYPE_PID);  in pid_for_clock()  local
72 		return (tsk && same_thread_group(tsk, current)) ? pid : NULL;  in pid_for_clock()
267 void thread_group_sample_cputime(struct task_struct *tsk, u64 *samples)  in thread_group_sample_cputime()  argument
269 	struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;  in thread_group_sample_cputime()
270 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;  in thread_group_sample_cputime()
289 static void thread_group_start_cputime(struct task_struct *tsk, u64 *samples)  in thread_group_start_cputime()  argument
291 	struct thread_group_cputimer *cputimer = &tsk->signal->cputimer;  in thread_group_start_cputime()
292 	struct posix_cputimers *pct = &tsk->signal->posix_cputimers;  in thread_group_start_cputime()
294 	lockdep_assert_task_sighand_held(tsk);  in thread_group_start_cputime()
305 		thread_group_cputime(tsk, &sum);  in thread_group_start_cputime()
320 static void __thread_group_cputime(struct task_struct *tsk, u64 *samples)  in __thread_group_cputime()  argument
324 	thread_group_cputime(tsk, &ct);  in __thread_group_cputime()
355 	struct task_struct *tsk;  in posix_cpu_clock_get()  local
359 	tsk = pid_task(pid_for_clock(clock, true), clock_pid_type(clock));  in posix_cpu_clock_get()
360 	if (!tsk) {  in posix_cpu_clock_get()
366 		t = cpu_clock_sample(clkid, tsk);  in posix_cpu_clock_get()
368 		t = cpu_clock_sample_group(clkid, tsk, false);  in posix_cpu_clock_get()
411 					      struct task_struct *tsk)  in timer_base()  argument
416 		return tsk->posix_cputimers.bases + clkidx;  in timer_base()
418 		return tsk->signal->posix_cputimers.bases + clkidx;  in timer_base()
428 					struct task_struct *tsk)  in trigger_base_recalc_expires()  argument
430 	struct posix_cputimer_base *base = timer_base(timer, tsk);  in trigger_base_recalc_expires()
537 void posix_cpu_timers_exit(struct task_struct *tsk)  in posix_cpu_timers_exit()  argument
539 	cleanup_timers(&tsk->posix_cputimers);  in posix_cpu_timers_exit()
541 void posix_cpu_timers_exit_group(struct task_struct *tsk)  in posix_cpu_timers_exit_group()  argument
543 	cleanup_timers(&tsk->signal->posix_cputimers);  in posix_cpu_timers_exit_group()
864 static inline void check_dl_overrun(struct task_struct *tsk)  in check_dl_overrun()  argument
866 	if (tsk->dl.dl_overrun) {  in check_dl_overrun()
867 		tsk->dl.dl_overrun = 0;  in check_dl_overrun()
868 		__group_send_sig_info(SIGXCPU, SEND_SIG_PRIV, tsk);  in check_dl_overrun()
891 static void check_thread_timers(struct task_struct *tsk,  in check_thread_timers()  argument
894 	struct posix_cputimers *pct = &tsk->posix_cputimers;  in check_thread_timers()
898 	if (dl_task(tsk))  in check_thread_timers()
899 		check_dl_overrun(tsk);  in check_thread_timers()
904 	task_sample_cputime(tsk, samples);  in check_thread_timers()
910 	soft = task_rlimit(tsk, RLIMIT_RTTIME);  in check_thread_timers()
913 		unsigned long rttime = tsk->rt.timeout * (USEC_PER_SEC / HZ);  in check_thread_timers()
914 		unsigned long hard = task_rlimit_max(tsk, RLIMIT_RTTIME);  in check_thread_timers()
924 			tsk->signal->rlim[RLIMIT_RTTIME].rlim_cur = soft;  in check_thread_timers()
929 		tick_dep_clear_task(tsk, TICK_DEP_BIT_POSIX_TIMER);  in check_thread_timers()
941 static void check_cpu_itimer(struct task_struct *tsk, struct cpu_itimer *it,  in check_cpu_itimer()  argument
955 				    task_tgid(tsk), cur_time);  in check_cpu_itimer()
956 		__group_send_sig_info(signo, SEND_SIG_PRIV, tsk);  in check_cpu_itimer()
968 static void check_process_timers(struct task_struct *tsk,  in check_process_timers()  argument
971 	struct signal_struct *const sig = tsk->signal;  in check_process_timers()
1000 	check_cpu_itimer(tsk, &sig->it[CPUCLOCK_PROF],  in check_process_timers()
1003 	check_cpu_itimer(tsk, &sig->it[CPUCLOCK_VIRT],  in check_process_timers()
1007 	soft = task_rlimit(tsk, RLIMIT_CPU);  in check_process_timers()
1010 		unsigned long hard = task_rlimit_max(tsk, RLIMIT_CPU);  in check_process_timers()
1109 static inline bool fastpath_timer_check(struct task_struct *tsk)  in fastpath_timer_check()  argument
1111 	struct posix_cputimers *pct = &tsk->posix_cputimers;  in fastpath_timer_check()
1117 		task_sample_cputime(tsk, samples);  in fastpath_timer_check()
1122 	sig = tsk->signal;  in fastpath_timer_check()
1149 	if (dl_task(tsk) && tsk->dl.dl_overrun)  in fastpath_timer_check()
1155 static void handle_posix_cpu_timers(struct task_struct *tsk);
1174 	struct task_struct *tsk = rcu_dereference(timr->it.cpu.handling);  in posix_cpu_timer_wait_running()  local
1177 	if (!tsk)  in posix_cpu_timer_wait_running()
1181 	get_task_struct(tsk);  in posix_cpu_timer_wait_running()
1185 	mutex_lock(&tsk->posix_cputimers_work.mutex);  in posix_cpu_timer_wait_running()
1187 	mutex_unlock(&tsk->posix_cputimers_work.mutex);  in posix_cpu_timer_wait_running()
1189 	put_task_struct(tsk);  in posix_cpu_timer_wait_running()
1237 static inline bool posix_cpu_timers_work_scheduled(struct task_struct *tsk)  in posix_cpu_timers_work_scheduled()  argument
1239 	return tsk->posix_cputimers_work.scheduled;  in posix_cpu_timers_work_scheduled()
1242 static inline void __run_posix_cpu_timers(struct task_struct *tsk)  in __run_posix_cpu_timers()  argument
1244 	if (WARN_ON_ONCE(tsk->posix_cputimers_work.scheduled))  in __run_posix_cpu_timers()
1248 	tsk->posix_cputimers_work.scheduled = true;  in __run_posix_cpu_timers()
1249 	task_work_add(tsk, &tsk->posix_cputimers_work.work, TWA_RESUME);  in __run_posix_cpu_timers()
1252 static inline bool posix_cpu_timers_enable_work(struct task_struct *tsk,  in posix_cpu_timers_enable_work()  argument
1263 		tsk->posix_cputimers_work.scheduled = false;  in posix_cpu_timers_enable_work()
1281 	if (start != jiffies && fastpath_timer_check(tsk))  in posix_cpu_timers_enable_work()
1284 		tsk->posix_cputimers_work.scheduled = false;  in posix_cpu_timers_enable_work()
1290 static inline void __run_posix_cpu_timers(struct task_struct *tsk)  in __run_posix_cpu_timers()  argument
1293 	handle_posix_cpu_timers(tsk);  in __run_posix_cpu_timers()
1309 static inline bool posix_cpu_timers_work_scheduled(struct task_struct *tsk)  in posix_cpu_timers_work_scheduled()  argument
1314 static inline bool posix_cpu_timers_enable_work(struct task_struct *tsk,  in posix_cpu_timers_enable_work()  argument
1321 static void handle_posix_cpu_timers(struct task_struct *tsk)  in handle_posix_cpu_timers()  argument
1327 	if (!lock_task_sighand(tsk, &flags))  in handle_posix_cpu_timers()
1344 		check_thread_timers(tsk, &firing);  in handle_posix_cpu_timers()
1346 		check_process_timers(tsk, &firing);  in handle_posix_cpu_timers()
1378 	} while (!posix_cpu_timers_enable_work(tsk, start));  in handle_posix_cpu_timers()
1388 	unlock_task_sighand(tsk, &flags);  in handle_posix_cpu_timers()
1430 	struct task_struct *tsk = current;  in run_posix_cpu_timers()  local
1438 	if (posix_cpu_timers_work_scheduled(tsk))  in run_posix_cpu_timers()
1445 	if (!fastpath_timer_check(tsk))  in run_posix_cpu_timers()
1448 	__run_posix_cpu_timers(tsk);  in run_posix_cpu_timers()
1455 void set_process_cpu_timer(struct task_struct *tsk, unsigned int clkid,  in set_process_cpu_timer()  argument
1463 	nextevt = &tsk->signal->posix_cputimers.bases[clkid].nextevt;  in set_process_cpu_timer()
1464 	now = cpu_clock_sample_group(clkid, tsk, true);  in set_process_cpu_timer()
1492 	tick_dep_set_signal(tsk, TICK_DEP_BIT_POSIX_TIMER);  in set_process_cpu_timer()