2 files changed, 2 insertions, 8 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 0cb4f097f76c..39acee2c8929 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2318,11 +2318,6 @@ static inline int thread_group_empty(struct task_struct *p)
 #define delay_group_leader(p) \
                 (thread_group_leader(p) && !thread_group_empty(p))
 
-static inline int task_detached(struct task_struct *p)
-{
-        return p->exit_signal == -1;
-}
-
 /*
  * Protects ->fs, ->files, ->mm, ->group_info, ->comm, keyring
  * subscriptions and synchronises with wait4().  Also used in procfs.  Also
diff --git a/kernel/exit.c b/kernel/exit.c
index 2b1ba8048a14..9fa99702645d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -189,7 +189,6 @@ repeat:
         zap_leader = 0;
         leader = p->group_leader;
         if (leader != p && thread_group_empty(leader) && leader->exit_state == EXIT_ZOMBIE) {
-                BUG_ON(task_detached(leader));
                 /*
                  * If we were the last child thread and the leader has
                  * exited already, and the leader's parent ignores SIGCHLD,
@@ -1231,9 +1230,9 @@ static int wait_task_zombie(struct wait_opts *wo, struct task_struct *p)
         traced = ptrace_reparented(p);
         /*
          * It can be ptraced but not reparented, check
-         * !task_detached() to filter out sub-threads.
+         * thread_group_leader() to filter out sub-threads.
          */
-        if (likely(!traced) && likely(!task_detached(p))) {
+        if (likely(!traced) && thread_group_leader(p)) {
                 struct signal_struct *psig;
                 struct signal_struct *sig;
                 unsigned long maxrss;