7  *  1997-11-02  Modified for POSIX.1b signals by Richard Henderson
11  *		to allow signals to be sent reliably.
93 	/* Only allow kernel generated signals to this kthread */  in sig_task_ignored()
104 	 * Blocked signals are never ignored, since the  in sig_ignored()
124  * signals, globally pending signals, and blocked signals.
193 	/* Have any signals or users of TIF_SIGPENDING been delayed  in calculate_sigpending()
218 	 * synchronous signals that need to be dequeued first.  in next_signal()
468  * Flush all pending signals for this kthread.
628 	/* We only dequeue private signals from ourselves, we don't let  in dequeue_signal()
717 		/* Synchronous signals have a postive si_code */  in dequeue_synchronous_signal()
769  * Remove signals in mask from the pending set and queue.
770  * Returns 1 if any signals were found.
885  * Handle magic process-wide effects of stop/continue signals. Unlike
889  * signals. The process stop is done as a signal action for SIG_DFL.
917 		 * Remove all stop signals from all queues, wake all threads.  in prepare_signal()
963  * have pending signals.  Such threads will dequeue from the shared queue
1000 		 * It will dequeue unblocked signals before it runs again.  in complete_signal()
1060 static inline bool legacy_queue(struct sigpending *signals, int sig)  in legacy_queue()  argument
1062 	return (sig < SIGRTMIN) && sigismember(&signals->signal, sig);  in legacy_queue()
1081 	 * Short-circuit ignored signals and support queuing  in __send_signal()
1097 	 * Real-time signals must be queued if sent by sigqueue, or  in __send_signal()
1161 	/* Let multiprocess signals appear after on-going forks */  in __send_signal()
1213 		/* Don't ignore kernel generated signals */  in send_signal()
1270 __setup("print-fatal-signals=", setup_print_fatal_signals);
1798  * These functions support sending signals using preallocated sigqueue
2245 	 * Queued signals ignored us while we were stopped for tracing.  in ptrace_stop()
2278  * do_signal_stop - handle group stop for SIGSTOP and other stop signals
2321 		 * usual behavior as two consecutive stop signals can't  in do_signal_stop()
2617 		 * Signals generated by the execution of an instruction  in get_signal()
2618 		 * need to be delivered before any other pending signals  in get_signal()
2637 		/* Trace actually delivered signals. */  in get_signal()
2659 		 * Global init gets no signals it doesn't want.  in get_signal()
2660 		 * Container-init gets no signals it doesn't want from same  in get_signal()
2675 			 * the thread group.  The job control signals  in get_signal()
2686 				/* signals can be posted during this window */  in get_signal()
2732 		 * Death signals, no core dump.  in get_signal()
2749  * delivered. It updates the blocked signals accordingly (@ksig->ka.sa.sa_mask
2781  * the shared signals in @which since we will not.
2799 		/* Remove the signals this thread can handle. */  in retarget_shared_pending()
2829 	 * From now this task is not visible for group-wide signals,  in exit_signals()
2882 		/* A set of now blocked but previously unblocked signals. */  in __set_task_blocked()
2921  * (or permanently) block certain signals.
2924  * interface happily blocks "unblockable" signals like SIGKILL
3004  *  sys_rt_sigprocmask - change the list of currently blocked signals
3005  *  @how: whether to add, remove, or set signals
3006  *  @nset: stores pending signals
3079  *  @uset: stores pending signals
3427  *  do_sigtimedwait - wait for queued signals specified in @which
3428  *  @which: queued signals to wait for
3448 	 * Invert the set of allowed signals to get those we want to block.  in do_sigtimedwait()
3483  *  sys_rt_sigtimedwait - synchronously wait for queued signals specified
3485  *  @uthese: queued signals to wait for
3697  * The syscall currently only signals via PIDTYPE_PID which covers
3744 		/* Only allow sending arbitrary signals to yourself. */  in SYSCALL_DEFINE4()
3841 	/* Not even root can pretend to send signals from the kernel.  in do_rt_sigqueueinfo()
3888 	/* Not even root can pretend to send signals from the kernel.  in do_rt_tgsigqueueinfo()
4138  *  sys_sigpending - examine pending signals
4171  *  sys_sigprocmask - examine and change blocked signals
4172  *  @how: whether to add, remove, or set signals
4173  *  @nset: signals to add or remove (if non-null)
4580  * kdb_send_sig - Allows kdb to send signals without exposing