diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 0c37d99..7f05f3a 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -25,6 +25,12 @@
 #include <linux/hw_breakpoint.h>
 
 
+static int ptrace_trapping_sleep_fn(void *flags)
+{
+	schedule();
+	return 0;
+}
+
 /*
  * ptrace a task: make the debugger its new parent and
  * move it to the ptrace list.
@@ -270,8 +276,8 @@
 	mutex_unlock(&task->signal->cred_guard_mutex);
 out:
 	if (!retval)
-		wait_event(current->signal->wait_chldexit,
-			   !(task->jobctl & JOBCTL_TRAPPING));
+		wait_on_bit(&task->jobctl, JOBCTL_TRAPPING_BIT,
+			    ptrace_trapping_sleep_fn, TASK_UNINTERRUPTIBLE);
 	return retval;
 }
 
diff --git a/kernel/signal.c b/kernel/signal.c
index 9ab91c5..172a4c7 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -272,8 +272,7 @@
 {
 	if (unlikely(task->jobctl & JOBCTL_TRAPPING)) {
 		task->jobctl &= ~JOBCTL_TRAPPING;
-		__wake_up_sync_key(&task->parent->signal->wait_chldexit,
-				   TASK_UNINTERRUPTIBLE, 1, task);
+		wake_up_bit(&task->jobctl, JOBCTL_TRAPPING_BIT);
 	}
 }