How to make the kernel support NTFS?

well, previously you didn't mention about "make oldconfig", but then
you said you did "make oldconfig". Which one is right?

It may be an inaccurate expression. 'make oldconfig' are next to
Coping .config, and they are two steps. I mean I don't do them at all.

The only way "make oldconfig" find the old .config file is AFAIK by
placing it in top source directory of extracted linux kernel.

When I invoking 'make oldconfig' withou a .config in /usr/src/linux ,
I get these messages:

root [ /usr/src/linux ]# make oldconfig
scripts/kconfig/conf -o arch/x86/Kconfig
#
# using defaults found in /boot/config-2.6.34
#
#
# configuration written to .config
#

So, I think 'make' should get a copy of /boot/.config-2.6.34 into
/usr/src/linux.