Kernel / loop-aes compiling problem: how could that happen?

Hi,
nothing terrible, but I would like to resolve the question. It takes some 
reconstruction, which goes right here:

0. there is kernel tree in /usr/src/linux-1
1. mv /usr/src/linux-1 /usr/src/linux-1-patched
2. ln -s /usr/src/linux /usr/src/linux-1-patched
3. cd /usr/src/linux-1-patched
4. patch -p1 <x.patch
5. make mrproper
6. make menuconfig
7. make
8. make modules_install
9. cp arch/x86.../bzImage ...
10. cd /path/to/loop-aes
11. make clean
12. make LINUX_SRC=/usr/src/linux-1-patched

and this one gives me a bunch of errors, which complain about undefined things 
and mention /usr/src/linux-1!

How so?

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Linux-crypto:  cryptography in and on the Linux system
Archive:       http://mail.nl.linux.org/linux-crypto/