Can't remove CONFIG_GENERIC_CMOS_UPDATE, CONFIG_X86_TSC from kernel configuration

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I want to rebuild linux-3.16.3-200.fc20.x86_64 with options:

But it seams that "make olddefconfig" enables these options again because of dependencies.

I found the "select GENERIC_CMOS_UPDATE" entries in  arch/*/Kconfig files - if I remove them, I am able to build a kernel with CONFIG_GENERIC_CMOS_UPDATE=n.
It's selected by default but does not seam to be necessary isn't it?

I am not able to disable CONFIG_X86_TSC.
It seams that Xen (arch/x86/xen/Kconfig) depends on X86_TSC - so I disabled all the XEN stuff.
May arch/x86/Kconfig.cpu (config X86_TSC - def_bool y) is the reason that CONFIG_X86_TSC is enabled again?
I thought it's just on of multiple clock sources isn't it?

It's my first email to a kernel mailing list so please be clement - feetback welcome. :-)

Mit freundlichen Grüßen/Best regards

Stefan Lauterwasser
Software Engineer 
Transportation Systems 
Thales Deutschland

Email:                  Stefan.Lauterwasser@xxxxxxxxxxxxxxx
Thales Transportation Systems GmbH 
Thalesplatz 1 - 71254 Ditzingen - Germany

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