Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index e223e26..07875cc 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -35,23 +35,24 @@
 
 	/* Protected by tx_lock */
 	u32 tx_cnt;
-	u32 buf_alloc;
 	u32 peer_fwd_cnt;
 	u32 peer_buf_alloc;
 
 	/* Protected by rx_lock */
 	u32 fwd_cnt;
+	u32 last_fwd_cnt;
 	u32 rx_bytes;
+	u32 buf_alloc;
 	struct list_head rx_queue;
 };
 
 struct virtio_vsock_pkt {
 	struct virtio_vsock_hdr	hdr;
-	struct work_struct work;
 	struct list_head list;
 	/* socket refcnt not held, only use for cancellation */
 	struct vsock_sock *vsk;
 	void *buf;
+	u32 buf_len;
 	u32 len;
 	u32 off;
 	bool reply;