kernel recompilation for 2.4.21-15ELsmp i686
 

i want to insert generic serial driver as a module . for that i am recompiling the kernel my kernel is
linux 2.4.21-15.ELsmp i have done
1. make mrproper 2.make xconfig 3.make dep
4.make clean 5. make bzimage
6.make modules 7.make module_install
7. make install (is it right)
then reboot IT's GIVING KERNEL PANIC ERROR UNABLE TO MOUNT ROOT FILESYSTEM
can anyone help me .your help will be appriciable.
PLEASE help me

Did you perhaps forget a step(1.5 maybe??); make oldconfig

Try replacing the "root=LABEL=/" portion of the kernel line to use your actual root partition, hint carefully read the top comments section of your /boot/grub/grub.conf file.

it sounds like you forgot to include one of your dependencies - maybe the HD. If you have more error info, or can tell more about what you did before the failure, that would help.