Andreas Kling 5b2447a27b Kernel: Track user accessibility per Region. ...

Region now has is_user_accessible(), which informs the memory manager how
to map these pages. Previously, we were just passing a "bool user_allowed"
to various functions and I'm not at all sure that any of that was correct.

All the Region constructors are now hidden, and you must go through one of
these helpers to construct a region:

- Region::create_user_accessible(...)
- Region::create_kernel_only(...)

That ensures that we don't accidentally create a Region without specifying
user accessibility. :^)

2019-07-19 16:11:52 +02:00

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