[PATCH] restore ->pdeath_signal behaviour

Commit b2b2cbc4b2a2f389442549399a993a8306420baf introduced a user-
visible change: ->pdeath_signal is sent only when the entire thread
group exits.

While this change is imho good, it may break things.  So restore the
old behaviour for now.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
To: Albert Cahalan <acahalan@gmail.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Linus Torvalds <torvalds@osdl.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Qi Yong <qiyong@fc-cn.com>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 4 insertions, 4 deletions

diff --git a/kernel/exit.c b/kernel/exit.c
index 46cf6b681460..35401720635b 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -597,6 +597,10 @@ choose_new_parent(struct task_struct *p, struct task_struct *reaper)
 static void
 reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 {
+        if (p->pdeath_signal)
+                /* We already hold the tasklist_lock here.  */
+                group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p);
+
         /* Move the child from its dying parent to the new one.  */
         if (unlikely(traced)) {
                 /* Preserve ptrace links if someone else is tracing this child.  */
@@ -631,10 +635,6 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
         /* We don't want people slaying init.  */
         if (p->exit_signal != -1)
                 p->exit_signal = SIGCHLD;
-                
-        if (p->pdeath_signal)
-                /* We already hold the tasklist_lock here.  */
-                group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p);
 
         /* If we'd notified the old parent about this child's death,
          * also notify the new parent.