linux-master/kernel/exit.c

1352  * -ECHILD should be in ->notask_error before the first call.
1355  * then ->notask_error is 0 if @p is an eligible child,
1379 		 * we should clear notask_error, debugger will notify us.
1382 			wo->notask_error = 0;
1417 		 * falling through.  Clearing of notask_error is complex.
1421 		 * If WEXITED is set, notask_error should naturally be
1433 		 * Clear notask_error if WCONTINUED | WEXITED.
1436 			wo->notask_error = 0;
1442 		wo->notask_error = 0;
1464  * -ECHILD should be in ->notask_error before the first call.
1467  * ->notask_error is 0 if there were any eligible children,
1574 	 * We will clear ->notask_error to zero if we see any child that
1578 	wo->notask_error = -ECHILD;
1608 	retval = wo->notask_error;