--- /dev/null
+Index: backports-v4.18-rc7/backport-include/net/rsi_91x.h
+===================================================================
+--- /dev/null
++++ backports-v4.18-rc7/backport-include/net/rsi_91x.h
+@@ -0,0 +1,61 @@
++#ifndef __BACKPORT_NET_RSI_9X_H
++#define __BACKPORT_NET_RSI_9X_H
++
++#if LINUX_VERSION_IS_LESS(4,18,0)
++/*
++ * Copyright (c) 2017 Redpine Signals Inc.
++ *
++ * Permission to use, copy, modify, and/or distribute this software for any
++ * purpose with or without fee is hereby granted, provided that the above
++ * copyright notice and this permission notice appear in all copies.
++ *
++ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
++ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
++ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
++ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
++ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
++ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
++ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
++ */
++
++#include <linux/skbuff.h>
++
++/* HAL queue information */
++#define RSI_COEX_Q 0x0
++#define RSI_BT_Q 0x2
++#define RSI_WLAN_Q 0x3
++#define RSI_WIFI_MGMT_Q 0x4
++#define RSI_WIFI_DATA_Q 0x5
++#define RSI_BT_MGMT_Q 0x6
++#define RSI_BT_DATA_Q 0x7
++
++enum rsi_coex_queues {
++ RSI_COEX_Q_INVALID = -1,
++ RSI_COEX_Q_COMMON = 0,
++ RSI_COEX_Q_BT,
++ RSI_COEX_Q_WLAN
++};
++
++enum rsi_host_intf {
++ RSI_HOST_INTF_SDIO = 0,
++ RSI_HOST_INTF_USB
++};
++
++struct rsi_proto_ops {
++ int (*coex_send_pkt)(void *priv, struct sk_buff *skb, u8 hal_queue);
++ enum rsi_host_intf (*get_host_intf)(void *priv);
++ void (*set_bt_context)(void *priv, void *context);
++};
++
++struct rsi_mod_ops {
++ int (*attach)(void *priv, struct rsi_proto_ops *ops);
++ void (*detach)(void *priv);
++ int (*recv_pkt)(void *priv, const u8 *msg);
++};
++
++extern const struct rsi_mod_ops rsi_bt_ops;
++
++#else
++#include_next <net/rsi_91x.h>
++#endif
++#endif /* __BACKPORT_NET_RSI_9X_H */