suse man page for tracehook_notify_jctl

TRACEHOOK_NOTIFY_JCT(9) 					 Kernel Internals					   TRACEHOOK_NOTIFY_JCT(9)

NAME
       tracehook_notify_jctl - report about job control stop/continue

SYNOPSIS
       int tracehook_notify_jctl(int notify, int why);

ARGUMENTS
       notify
	   zero, CLD_STOPPED or CLD_CONTINUED

       why

	   CLD_STOPPED or CLD_CONTINUED

DESCRIPTION
       This is called when we might call do_notify_parent_cldstop.

       notify is zero if we would not ordinarily send a SIGCHLD, or is the CLD_STOPPED or CLD_CONTINUED .si_code for SIGCHLD.

       why is CLD_STOPPED when about to stop for job control; we are already in TASK_STOPPED state, about to call schedule. It might also be that
       we have just exited (check PF_EXITING), but need to report that a group-wide stop is complete.

       why is CLD_CONTINUED when waking up after job control stop and ready to make a delayed notify report.

       Return the CLD_* value for SIGCHLD, or zero to generate no signal.

       Called with the siglock held.

Kernel Hackers Manual 2.6.					     July 2010						   TRACEHOOK_NOTIFY_JCT(9)