---

yaml
---
r: 95152
b: refs/heads/master
c: 53b6f9f
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2800d8d19e51414403df8144eaa214bb03400b87
+refs/heads/master: 53b6f9fbd3b63af14b4f6268e8b5b80d178d05bc

trunk/include/linux/ptrace.h

@@ -98,6 +98,10 @@ extern void ptrace_untrace(struct task_struct *child);
 extern int ptrace_may_attach(struct task_struct *task);
 extern int __ptrace_may_attach(struct task_struct *task);
 
+static inline int ptrace_reparented(struct task_struct *child)
+{
+	return child->real_parent != child->parent;
+}
 static inline void ptrace_link(struct task_struct *child,
 			       struct task_struct *new_parent)
 {

trunk/kernel/exit.c

@@ -698,7 +698,7 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 	if (unlikely(traced)) {
 		/* Preserve ptrace links if someone else is tracing this child.  */
 		list_del_init(&p->ptrace_list);
-		if (p->parent != p->real_parent)
+		if (ptrace_reparented(p))
 			list_add(&p->ptrace_list, &p->real_parent->ptrace_children);
 	} else {
 		/* If this child is being traced, then we're the one tracing it
@@ -865,8 +865,8 @@ static void exit_notify(struct task_struct *tsk, int group_dead)
 	 * only has special meaning to our real parent.
 	 */
 	if (!task_detached(tsk) && thread_group_empty(tsk)) {
-		int signal = (tsk->parent == tsk->real_parent)
-				? tsk->exit_signal : SIGCHLD;
+		int signal = ptrace_reparented(tsk) ?
+				SIGCHLD : tsk->exit_signal;
 		do_notify_parent(tsk, signal);
 	} else if (tsk->ptrace) {
 		do_notify_parent(tsk, SIGCHLD);
@@ -1269,8 +1269,7 @@ static int wait_task_zombie(struct task_struct *p, int noreap,
 		return 0;
 	}
 
-	/* traced means p->ptrace, but not vice versa */
-	traced = (p->real_parent != p->parent);
+	traced = ptrace_reparented(p);
 
 	if (likely(!traced)) {
 		struct signal_struct *psig;