Cannot open kernel menu configuration

Question

In both architectures, when I go to /usr/src/linux and enter a:
make menuconfig
This is what I get:
scripts/kconfig/mconf arch/i386/Kconfig
drivers/crypto/Kconfig:44: can't open file "arch/s390/crypto/Kconfig"
make[1]: *** [menuconfig] Error 1
make: *** [menuconfig] Error 2
The same happens if I enter a make oldconfig.
The symlink (linux -> linux-2.6-blah-blah) is correctly placed as is the .config file.
Both are where they are supposed to be.
This did work normally on previous versions of the kernel.
What has changed now?

Answer 1

I see.
In the past, when the tree was still full, and it could be done, I had taken a glimpse inside Arch kernel configuration.
You see, I do not need to compile my own kernel as the stock works perfectly.
But as an old Gentoo user, for educational purposes, I do look inside kernel configurations from time to time.
Is there any way to see the configuration? (I am not so familiar with reading directly the .config file)
A package perhaps containing the full source tree, or perhaps something in the abs tree?