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Commit 2800d8d1 authored Apr 30, 2008 by Oleg Nesterov Committed by Linus Torvalds Apr 30, 2008

document de_thread() with exit_notify() connection



Add a couple of small comments, it is not easy to see what this code does.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 376e1d25

fs/exec.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -798,7 +798,7 @@ static int de_thread(struct task_struct *tsk)
	if (!thread_group_leader(tsk)) {		if (!thread_group_leader(tsk)) {
	leader = tsk->group_leader;		leader = tsk->group_leader;

	sig->notify_count = -1;		sig->notify_count = -1; /* for exit_notify() */
	for (;;) {		for (;;) {
	write_lock_irq(&tasklist_lock);		write_lock_irq(&tasklist_lock);
	if (likely(leader->exit_state))		if (likely(leader->exit_state))

kernel/exit.c

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -877,6 +877,7 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
	state = EXIT_DEAD;		state = EXIT_DEAD;
	tsk->exit_state = state;		tsk->exit_state = state;

			/* mt-exec, de_thread() is waiting for us */
	if (thread_group_leader(tsk) &&		if (thread_group_leader(tsk) &&
	tsk->signal->notify_count < 0 &&		tsk->signal->notify_count < 0 &&
	tsk->signal->group_exit_task)		tsk->signal->group_exit_task)