Liav A.

This is not stale.

This is not stale.

Relies on #16802.

> These changes don't look right. We can't guard address space mutation with a mutex, as mutexes can only be taken in contexts where we're able to block the current...

This is not stale.

In the commit message please change to the following pharses: `it possible to partially parse the DSTS table in my computer/qemu.` => `it possible to partially parse the DSDT table...

Rebased this on the latest master commit now :)

> Generally a "not a fan" from me. Utilities are much smaller than the kernel, and not worrying about accidentally changing settings from anywhere else was `SetOnce`s main selling point...

> I had the same reaction as Tim. These books are currently set once, but in many cases that just happens to be this way and it's neither a strong...

> I'm also not seeing the benefit of using this in the Utilities. Have we ever had a bug in them which this would have prevented? > > If being...