1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/sched.h b/include/linux/sched.h
index e194ec75833d..e3539c14e47e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1209,9 +1209,10 @@ extern void wait_task_inactive(task_t * p);
 #define while_each_thread(g, t) \
         while ((t = next_thread(t)) != g)
 
-#define thread_group_leader(p)  (p->pid == p->tgid)
+/* de_thread depends on thread_group_leader not being a pid based check */
+#define thread_group_leader(p)  (p == p->group_leader)
 
-static inline task_t *next_thread(task_t *p)
+static inline task_t *next_thread(const task_t *p)
 {
         return list_entry(rcu_dereference(p->thread_group.next),
                                 task_t, thread_group);