Unable To Mount Root FS on Unknown Block (0,0)

[ajay ss]

Hi,I have an appliance which is running FreeBSD. I wanted to boot WindRiver 
Linux when I reboot the appliance.There are more than one partition in the disk 
based on GPT. In partition 3, FreeBSD is kept (UFS). Windriver Linux is kept on 
partition 5 (EXT2).I installed GRUB 2.0 and made the entries in grub.cfg as 
below.menuentry "FreeBSD" {    insmod ufs2    set 
root=(hd0,3)    kfreebsd /boot/loader}menuentry "Linux " 
{    set root=(hd0,5)    echo "loading 
kernel"    echo 
"###############################################################" 
   linux /boot/bzImage-4.1.21-WR8.0.0.10_standard root=/dev/mfid0p5  
  echo "#####################LOADED 
KERNEL#############################"GRUB menu shows up the options FreeBSD 
& Linux on reboot.When I select "Linux", I could see, kernel is 
fetched and decompressed.But kernel panic happens by giving er
 ror.VFS : Unable to mount root fs on unknown-block(0,0)User configuration 
error - no valid root filesystem foundKernel panic - not syncing: Invalid 
configuration from end user prevents continuingNote: I am not using separate 
"initrd.img" as the linux image 
("bzImage-4.1.21-WR8.0.0.10_standard") is built with rootfs.Could you 
please help me in figuring out the issue.Thanks,Ajay