将WiFi驱动交叉编译成ko文件
原厂提供驱动，默认是x86平台编译
修改Makefile文件
在顶层Makefile中开头增加以下三个变量
KERNEL_OBJ_PATH 是内核文件路径
CROSS_COMPILE 交叉编译工具链
ARCH 架构
KERNEL_OBJ_PATH := /home/sdk/kernel
CROSS_COMPILE :=/opt/arm-linux-gnueabihf-
ARCH := arm编译
make clean
make遇到问题WARNING: "ieee80211_beacon_get_tim" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_beacon_get_tim" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_unregister_hw" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_scan_completed" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_stop_queues" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_tx_status" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_free_txskb" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_wake_queues" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_rx" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_stop_tx_ba_cb_irqsafe" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_find_sta" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_restart_hw" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_register_hw" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_start_tx_ba_session" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_alloc_hw" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_free_hw" [/home/ssv6x5x/ssv6x5x.ko] undefined!
WARNING: "ieee80211_start_tx_ba_cb_irqsafe" [/home/ssv6x5x/ssv6x5x.ko] undefined!
CC /home/ssv6x5x/ssv6x5x.mod.o
LD [M] /home/ssv6x5x/ssv6x5x.ko