sched/core: Remove the pointless BUG_ON(!task) from wake_up_q()

container_of() can never return NULL - so don't check for it pointlessly.

[ mingo: Twiddled the changelog. ]

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20210510161522.GA32644@redhat.com

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 5226cc2..61d1d85 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -585,7 +585,6 @@ void wake_up_q(struct wake_q_head *head)
                struct task_struct *task;
 
                task = container_of(node, struct task_struct, wake_q);
-               BUG_ON(!task);
                /* Task can safely be re-inserted now: */
                node = node->next;
                task->wake_q.next = NULL;