document de_thread() with exit_notify() connection

2800d8d1 · Oleg Nesterov <[email protected]> · 2008-04-30 00:53:12 -07:00

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

Signed-off-by: Oleg Nesterov <[email protected]>
Cc: Roland McGrath <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Commit: 2800d8d19e51414403df8144eaa214bb03400b87
Parents: 376e1d25

Changes

2 files changed · +2 −1

File	Status	Add	Del	Content
fs/exec.c	modified	+1	−1	View file
kernel/exit.c	modified	+1	−0	View file

fs/exec.c

View file

diff --git a/fs/exec.c b/fs/exec.c
index 8fccc27..9f9f931 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -798,7 +798,7 @@ static int de_thread(struct task_struct *tsk)
 	if (!thread_group_leader(tsk)) {
 		leader = tsk->group_leader;
 
-		sig->notify_count = -1;
+		sig->notify_count = -1;	/* for exit_notify() */
 		for (;;) {
 			write_lock_irq(&tasklist_lock);
 			if (likely(leader->exit_state))

kernel/exit.c

View file

diff --git a/kernel/exit.c b/kernel/exit.c
index 413c81e..879ed6e 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -877,6 +877,7 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
 		state = EXIT_DEAD;
 	tsk->exit_state = state;
 
+	/* mt-exec, de_thread() is waiting for us */
 	if (thread_group_leader(tsk) &&
 	    tsk->signal->notify_count < 0 &&
 	    tsk->signal->group_exit_task)