On Mon, Oct 16, 2017 at 09:37:17PM +1100, Tobin C. Harding wrote:

What is the correct way to write code that is conditionally compiled depending on 32/64 bit?

Not to write code that is dependent on such a thing in the first place
:)

I found

CONFIG_X86_64
CONFIG_64BIT

Do we still support other word sizes?

No, but those are not what you should be looking for, it all depends on
the architecture and where in the kernel you need to do this (arch
specific code, driver, kernel, networking, etc.)

Any specific hints on why you think you need this?

thanks,

greg k-h