rt2x00: Fix broken recover-on-error path

[linux-2.6] / kernel / exit.c

diff --git a/kernel/exit.c b/kernel/exit.c
index 413c81ec858e6ea5ef989d9a55ce5d706d15b522..d3ad54677f9c0257fa0a373f8ce1b4774e947722 100644 (file)
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -334,13 +334,11 @@ void __set_special_pids(struct pid *pid)
        pid_t nr = pid_nr(pid);
 
        if (task_session(curr) != pid) {
-               detach_pid(curr, PIDTYPE_SID);
-               attach_pid(curr, PIDTYPE_SID, pid);
+               change_pid(curr, PIDTYPE_SID, pid);
                set_task_session(curr, nr);
        }
        if (task_pgrp(curr) != pid) {
-               detach_pid(curr, PIDTYPE_PGID);
-               attach_pid(curr, PIDTYPE_PGID, pid);
+               change_pid(curr, PIDTYPE_PGID, pid);
                set_task_pgrp(curr, nr);
        }
 }
@@ -698,7 +696,7 @@ 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 +863,8 @@ 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);
@@ -877,6 +875,7 @@ 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)
@@ -1268,8 +1267,7 @@ 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;