Nfs root mounting problem!

Hi All,
I am working on Samsung S3C2510+uClinux-2.4.20 Platform. From last 10 days I
am trying to configure NFS   but Iam unable to setup it up.
I have invoked NFS support in kernel configuration & I change setup.c to
solve the command_line problem,
like..

#ifndef CONFIG_CMDLINE
// #define CONFIG_CMDLINE "root=/dev/rom0"
#define CONFIG_CMDLINE "root=/dev/nfs  rw
nfsroot=192.168.1.5:/home/umesh/uClinux/romfs
nfsaddrs=192.168.1.104:192.168.1.5:192.168.1.7:255.255.255.0::eth0:none"

and

//static char command_line[COMMAND_LINE_SIZE] = "root=/dev/rom0"
static char command_line[COMMAND_LINE_SIZE] = "root=/dev/nfs  rw
nfsroot=192.168.1.5:/home/umesh/uClinux/romfs
nfsaddrs=192.168.1.104:192.168.1.5:192.168.1.7:255.255.255.0::eth0:none";

But I am  still getting error:
I checked, my command line is parsing properly, even during booting I print
value of root device from  root_dev_setup() function  & it prints
root device = nfs. Please have a look on my boot log , It show
IP-config -complete with correct data. I dont know where I am missing
something even I serach the whole list archive and followed some help but I
am unable to get it work.


Linux version 2.4.20-uc0 ([email protected]) (gcc version 3.2.1) #200
Thu A
ug 12 18:32:56 KST 2004
ENVM: Loading ENV Memory.
Processor: Samsung Arm940T revision 2
Architecture: 2510REF-AN
Warning: bad configuration page, trying to continue
On node 0 totalpages: 8192
zone(0): 0 pages.
zone(1): 8192 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/nfs
nfsroot=192.168.1.5:/home/umesh/uClinux/romfs
 nfsaddrs=192.168.1.104:192.168.1.5:192.168.1.7:255.255.255.0::eth0:any
 we r in root_dev_setup func and *line=/dev/nfs
 we r in root_dev_setup func and ROOT_DEV= 255
  root device= nfs
Calibrating delay loop... 82.94 BogoMIPS
Memory: 32MB = 32MB total
Memory: 30992KB available (973K code, 342K data, 52K init)
Dentry cache hash table entries: 4096 (order: 3, 32768 bytes)
Inode cache hash table entries: 2048 (order: 2, 16384 bytes)
Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
Buffer-cache hash table entries: 1024 (order: 0, 4096 bytes)
Page-cache hash table entries: 8192 (order: 3, 32768 bytes)
POSIX conformance testing by UNIFIX
ENVM: Register envm driver.
board detection: 2510REF board
S3C2510 PCI Host Controller Initializing...
S3C2510 PCI host initialized
Found 00:00 [144d/a510] 000600 00
Found 00:08 [1260/3890] 000280 00
PCI: bus0: Fast back to back transfers enabled
  got res[c0000000:c0001fff] for resource 0 of PCI device 1260:3890 (Harris
Semi
conductor)
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd
S3C2510 Serial I/O driver
ttyS0: at 0xf0060000 (IRQs: Tx=11 Rx=12) is a builtin Console UART
ttyS1: at 0xf0070000 (IRQs: Tx=07 Rx=08) is a builtin High-Speed UART
ttyS2: at 0xf0080000 (IRQs: Tx=09 Rx=10) is a builtin High-Speed UART
s3c2510.c: Revision: 2.0 Date: 2004.Jan.02
ethaddr0==00:09:30:28:12:22
eth0: Auto-negotiation
eth0: found at f00a0000
ethaddr1==00:09:30:28:12:24
eth1: 100Mbps, Full-duplex fixed
eth1: found at f00c0000
Blkmem copyright 1998,1999 D. Jeff Dionne
Blkmem copyright 1998 Kenneth Albanowski
Blkmem 1 disk images:
0: 80020000-8301FFFF [VIRTUAL 80020000-8301FFFF] (RO)
IEEE 802.2 LLC for Linux 2.1 (c) 1996 Tim Alpaerts
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP, IGMP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 2048 bind 4096)
eth0: link up, 10Mbps, half-duplex, lpa 0x0021
IP-Config: Complete:
      device=eth0, addr=192.168.1.104, mask=255.255.255.0, gw=192.168.1.7,
     host=192.168.1.104, domain=, nis-domain=(none),
     bootserver=192.168.1.5, rootserver=192.168.1.5, rootpath=
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
NET4: Ethernet Bridge 008 for NET4.0
we r in mount_root function
we r in mount_root's  #if CONFIG_ROOT_NFS  block
we r  in  "mount_block_root" before "get_fs_names(fs_names)" , fs_names =
/dev/root
 we r  in  "mount_block_root" after "get_fs_names(fs_names)" fs_name= <NULL>
 in  mount_block_root=
Kernel panic: VFS: Unable to mount root fs on 1f:00

I dont know why it is unable to mount nfsroot  even I checked my nfs server
is working properly for other linux boxes.

If  somebody faced the similar problem Please help me Out.

I am very very sorry for long messege.

RegardS!!

Umesh