自己编译的linux内核，nfs挂载不了文件系统，求指点

蜕变

ok6410A-256MDDR+nandflash 4G 的开发板，自己根据网上编译的linux3.2.53的内核，根据网上修改了arch/arm/mach-s3c64xx/mach-ok6410.c文件添加了nand结构和dm9000结构体相关的东西，编译也通过了，启动内核出现以下信息，用官方给的内核可以挂载成功说明nfs配置没问题，内核启动的信息真心看不懂，菜鸟一枚闷头搞了一周了，请求各位大神指点


SMDK6410 # tftp c0008000 uImage
Found DM9000 ID:90000a46 at address 18000300 !
DM9000 work in 16 bus width
bd->bi_entaddr: 00:40:5c:26:0a:5b
[eth_init]MAC:0:40:5c:26:a:5b:
TFTP from server 192.168.2.100; our IP address is 192.168.2.111
Filename 'uImage'.
Load address: 0xc0008000
Loading: T T T #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #################################################################
         #####################
done
Bytes transferred = 2432872 (251f68 hex)
SMDK6410 # bootm c0008000
## Booting image at c0008000 ...
   Image Name:   Linux-3.2.53
   Created:      2013-12-05  13:19:22 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    2432808 Bytes =  2.3 MB
   Load Address: 50008000
   Entry Point:  50008000
   Verifying Checksum ... OK
OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.
Linux version 3.2.53 (root@ubuntu) (gcc version 4.3.2 (Sourcery G++ Lite 2008q3-72) ) #7 Thu Dec 5 21:18:57 CST 2013
CPU: ARMv6-compatible processor [410fb766] revision 6 (ARMv7), cr=00c5387d
CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
Machine: SMDK6410
Memory policy: ECC disabled, Data cache writeback
CPU S3C6410 (id 0x36410101)
S3C24XX Clocks, Copyright 2004 Simtec Electronics
camera: no parent clock specified
S3C64XX: PLL settings, A=532000000, M=532000000, E=24000000
S3C64XX: HCLK2=266000000, HCLK=133000000, PCLK=66500000
mout_apll: source is fout_apll (1), rate is 532000000
mout_epll: source is epll (1), rate is 24000000
mout_mpll: source is mpll (1), rate is 532000000
mmc_bus: source is mout_epll (0), rate is 24000000
mmc_bus: source is mout_epll (0), rate is 24000000
mmc_bus: source is mout_epll (0), rate is 24000000
usb-bus-host: source is clk_48m (0), rate is 48000000
uclk1: source is dout_mpll (1), rate is 66500000
spi-bus: source is mout_epll (0), rate is 24000000
spi-bus: source is mout_epll (0), rate is 24000000
audio-bus: source is mout_epll (0), rate is 24000000
audio-bus: source is mout_epll (0), rate is 24000000
audio-bus: source is mout_epll (0), rate is 24000000
irda-bus: source is mout_epll (0), rate is 24000000
camera: no parent clock specified
CPU: found DTCM0 8k @ 00000000, not enabled
CPU: moved DTCM0 8k to fffe8000, enabled
CPU: found DTCM1 8k @ 00000000, not enabled
CPU: moved DTCM1 8k to fffea000, enabled
CPU: found ITCM0 8k @ 00000000, not enabled
CPU: moved ITCM0 8k to fffe0000, enabled
CPU: found ITCM1 8k @ 00000000, not enabled
CPU: moved ITCM1 8k to fffe2000, enabled
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024
Kernel command line: root=/dev/nfs nfsroot=192.168.2.100:/nfs/FileSystem-Yaffs2

ip=192.168.2.111:192.168.2.100:192.168.2.1:255.255.255.0:witech.com.cn:eth0:off console=ttySAC0,115200
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 256MB = 256MB total
Memory: 254888k/254888k available, 7256k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    DTCM    : 0xfffe8000 - 0xfffec000   (  16 kB)
    ITCM    : 0xfffe0000 - 0xfffe4000   (  16 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    vmalloc : 0xd0800000 - 0xf6000000   ( 600 MB)
    lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .text : 0xc0008000 - 0xc0449d48   (4360 kB)
      .init : 0xc044a000 - 0xc046e000   ( 144 kB)
      .data : 0xc046e000 - 0xc049d3a0   ( 189 kB)
       .bss : 0xc049e024 - 0xc04d4604   ( 218 kB)
SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:246
VIC @f6000000: id 0x00041192, vendor 0x41
VIC @f6010000: id 0x00041192, vendor 0x41
Console: colour dummy device 80x30
Calibrating delay loop... 528.79 BogoMIPS (lpj=2643968)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
NET: Registered protocol family 16
s3c64xx_dma_init: Registering DMA channels
PL080: IRQ 73, at d0804000, channels 0..8
PL080: IRQ 74, at d0806000, channels 8..16
S3C6410: Initialising architecture
bio: create slab <bio-0> at 0
usbcore: registered new inte**ce driver usbfs
usbcore: registered new inte**ce driver hub
usbcore: registered new device driver usb
s3c-i2c s3c2440-i2c.0: slave address 0x10
s3c-i2c s3c2440-i2c.0: bus frequency set to 64 KHz
s3c-i2c s3c2440-i2c.0: i2c-0: S3C I2C adapter
s3c-i2c s3c2440-i2c.1: slave address 0x10
s3c-i2c s3c2440-i2c.1: bus frequency set to 64 KHz
s3c-i2c s3c2440-i2c.1: i2c-1: S3C I2C adapter
cfg80211: Calling CRDA to update world regulatory domain
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 5, 163840 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
UDP hash table entries: 128 (order: 0, 6144 bytes)
UDP-Lite hash table entries: 128 (order: 0, 6144 bytes)
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
nfs4filelayout_init: NFSv4 File Layout Driver Registering...
ROMFS MTD (C) 2007 Red Hat, Inc.
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
start plist test
end plist test
s3c-fb s3c-fb: window 0: fb
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
s3c6400-uart.0: ttySAC0 at MMIO 0x7f005000 (irq = 69) is a S3C6400/10
console [ttySAC0] enabled
s3c6400-uart.1: ttySAC1 at MMIO 0x7f005400 (irq = 70) is a S3C6400/10
s3c6400-uart.2: ttySAC2 at MMIO 0x7f005800 (irq = 71) is a S3C6400/10
s3c6400-uart.3: ttySAC3 at MMIO 0x7f005c00 (irq = 72) is a S3C6400/10
brd: module loaded
loop: module loaded
S3C24XX NAND Driver, (c) 2004 Simtec Electronics
dm9000 Ethernet Driver, V1.31
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
usbcore: registered new inte**ce driver rt73usb
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
s3c2410-ohci s3c2410-ohci: S3C24XX OHCI
s3c2410-ohci s3c2410-ohci: new USB bus registered, assigned bus number 1
s3c2410-ohci s3c2410-ohci: irq 79, io mem 0x74300000
s3c2410-ohci s3c2410-ohci: init err (00000000 0000)
ohci_hcd: can't start s3c24xx
s3c2410-ohci s3c2410-ohci: startup error -75
s3c2410-ohci s3c2410-ohci: USB bus 1 deregistered
s3c2410-ohci: probe of s3c2410-ohci failed with error -75
mousedev: PS/2 mouse device common for all mice
S3C24XX RTC, (c) 2004,2006 Simtec Electronics
s3c-rtc s3c64xx-rtc: rtc disabled, re-enabling
s3c-rtc s3c64xx-rtc: rtc core: registered s3c as rtc0
i2c /dev entries driver
sdhci: Secure Digital Host Controller Inte**ce driver
sdhci: Copyright(c) Pierre Ossman
s3c-sdhci s3c-sdhci.0: clock source 0: hsmmc (133000000 Hz)
s3c-sdhci s3c-sdhci.0: clock source 1: hsmmc (133000000 Hz)
s3c-sdhci s3c-sdhci.0: clock source 2: mmc_bus (24000000 Hz)
mmc0: SDHCI controller on samsung-hsmmc [s3c-sdhci.0] using ADMA
mmc0: mmc_rescan_try_freq: trying to init card at 400000 Hz
usbcore: registered new inte**ce driver usbhid
usbhid: USB HID core driver
TCP cubic registered
lib80211: common routines for IEEE802.11 drivers
Registering the dns_resolver key type
VFP support v0.3: implementor 41 architecture 1 part 20 variant b rev 5
mmc0: mmc_rescan_try_freq: trying to init card at 300000 Hz
s3c-rtc s3c64xx-rtc: setting system clock to 2000-02-25 23:43:09 UTC (951522189)
mmc0: mmc_rescan_try_freq: trying to init card at 200000 Hz
mmc0: mmc_rescan_try_freq: trying to init card at 100000 Hz
VFS: Unable to mount root fs via NFS, trying floppy.
VFS: Cannot open root device "nfs" or unknown-block(2,0)
Please append a correct "root=" boot option; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[<c0013b70>] (unwind_backtrace+0x0/0xf8) from [<c0338ff8>] (panic+0x58/0x1a0)
[<c0338ff8>] (panic+0x58/0x1a0) from [<c044ad50>] (mount_block_root+0x16c/0x224)
[<c044ad50>] (mount_block_root+0x16c/0x224) from [<c044ae88>] (mount_root+0x80/0x100)
[<c044ae88>] (mount_root+0x80/0x100) from [<c044b014>] (prepare_namespace+0x10c/0x1cc)
[<c044b014>] (prepare_namespace+0x10c/0x1cc) from [<c044a2a0>] (kernel_init+0xfc/0x140)
[<c044a2a0>] (kernel_init+0xfc/0x140) from [<c000ef7c>] (kernel_thread_exit+0x0/0x8)