the exact same limits apply to amd64 kernels as well.
> on amd64 you have much more address space to work with, so that 2G of
> kernel space can be moved to far more locations
you're wrong, the kernel image cannot be at arbitrary addresses, it *must* be in the top 2GB of the 64 bit virtual address space. i suggest you study the amd64 ABI and in particular -mcmodel=kernel.
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