Is it possible to map a process to memory without displaying a kernel?

Question

The OSDev wiki says that:

It is traditional and generally good for your kernel to appear in every user process.

Why is this? Could a process be matched only with memory? What are the benefits of kernel mapping and isn't it a waste of space?

Also, is it possible to access kernel space from user space and why should I do this?

Answer 1

It is traditional and generally good for your kernel to appear in every user process.

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