diff --git a/kernel/exit.c b/kernel/exit.c
index 733e80f334e7..1f51c27bae59 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1474,7 +1474,7 @@ static long do_wait(struct wait_opts *wo)
 	return retval;
 }
 
-static struct pid *pidfd_get_pid(unsigned int fd)
+static struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags)
 {
 	struct fd f;
 	struct pid *pid;
@@ -1484,8 +1484,10 @@ static struct pid *pidfd_get_pid(unsigned int fd)
 		return ERR_PTR(-EBADF);
 
 	pid = pidfd_pid(f.file);
-	if (!IS_ERR(pid))
+	if (!IS_ERR(pid)) {
 		get_pid(pid);
+		*flags = f.file->f_flags;
+	}
 
 	fdput(f);
 	return pid;
@@ -1498,6 +1500,7 @@ static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
 	struct pid *pid = NULL;
 	enum pid_type type;
 	long ret;
+	unsigned int f_flags = 0;
 
 	if (options & ~(WNOHANG|WNOWAIT|WEXITED|WSTOPPED|WCONTINUED|
 			__WNOTHREAD|__WCLONE|__WALL))
@@ -1531,9 +1534,10 @@ static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
 		if (upid < 0)
 			return -EINVAL;
 
-		pid = pidfd_get_pid(upid);
+		pid = pidfd_get_pid(upid, &f_flags);
 		if (IS_ERR(pid))
 			return PTR_ERR(pid);
+
 		break;
 	default:
 		return -EINVAL;
@@ -1544,7 +1548,12 @@ static long kernel_waitid(int which, pid_t upid, struct waitid_info *infop,
 	wo.wo_flags	= options;
 	wo.wo_info	= infop;
 	wo.wo_rusage	= ru;
+	if (f_flags & O_NONBLOCK)
+		wo.wo_flags |= WNOHANG;
+
 	ret = do_wait(&wo);
+	if (!ret && !(options & WNOHANG) && (f_flags & O_NONBLOCK))
+		ret = -EAGAIN;
 
 	put_pid(pid);
 	return ret;