本文通过udev机制实现sdio+wifi的挂载，当然，如果是arm处理器核，wifi所需的固件可以和wifi驱动一同编进linux内核；如果wifi驱动不认识你的核，则使用udev加载wifi模块是很好的方式。
udev的支持见《udev详细》一文。udev属于用户级程序，你的文件系统支持就可以了。
首先保证你的文件系统已经支持udev了，当然内核也支持了：
你需要选上MMC/SD卡驱动：
而后是wifi的驱动：
而后：
/ # udev
udevd udevstart
/ # udevd --daemon
/ # udevstart
/ # insmod libertas_sdio.ko
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
libertas_sdio mmc0:0001:1: firmware: requesting sd8686_helper.bin
libertas_sdio mmc0:0001:1: firmware: requesting sd8686.bin
libertas: 00:24:7e:a7:11:9d, fw 9.70.3p24, cap 0x00000303
libertas: wlan0: Marvell WLAN 802.11 adapter
你的nfs需要wirlesstolls工具，里面有iwlist,iwconfig,iwpriv等无线命令。
/ # ifconfig wlan0 up
/ # iwlist wlan0 scanning
wlan0 Scan completed :
Cell 01 - Address: 00:10:18:00:00:B6
ESSID:"wireless"
Mode:Managed
Frequency:2.412 GHz (Channel 1)
Quality=89/100 Signal level=-61 dBm Noise level=-96 dBm
Encryption key:on
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
IE: WPA Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
IE: IEEE 802.11i/WPA2 Version 1
Group Cipher : TKIP
Pairwise Ciphers (1) : TKIP
Authentication Suites (1) : PSK
Cell 02 - Address: 00:21:91:6F:F1:F2
ESSID:"dlink"
Mode:Managed
Frequency:2.437 GHz (Channel 6)
Quality=95/100 Signal level=-55 dBm Noise level=-96 dBm
Encryption key:off
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
9 Mb/s; 12 Mb/s; 48 Mb/s; 18 Mb/s; 24 Mb/s
36 Mb/s; 54 Mb/s
Cell 03 - Address: 00:21:29:8E:C4:3A
ESSID:"cisco-wireless"
Mode:Managed
Frequency:2.442 GHz (Channel 7)
Quality=95/100 Signal level=-55 dBm Noise level=-96 dBm
Encryption key:off
Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
12 Mb/s; 48 Mb/s
/ # iwconfig wlan0 essid dlink
而后配上ip，即可以ping通 热点：
64 bytes from 192.168.1.254: seq=97 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=98 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=99 ttl=64 time=40.000 ms
64 bytes from 192.168.1.254: seq=100 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=101 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=102 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=103 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=104 ttl=64 time=40.000 ms
64 bytes from 192.168.1.254: seq=105 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=106 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=107 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=108 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=109 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=110 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=111 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=112 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=113 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=114 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=115 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=116 ttl=64 time=60.000 ms
64 bytes from 192.168.1.254: seq=117 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=118 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=119 ttl=64 time=60.000 ms
64 bytes from 192.168.1.254: seq=120 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=121 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=122 ttl=64 time=40.000 ms
64 bytes from 192.168.1.254: seq=123 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=124 ttl=64 time=20.000 ms
64 bytes from 192.168.1.254: seq=125 ttl=64 time=20.000 ms
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