Andreas Kling 259cca456f Kernel: Make PhysicalRegion::return_page() do arithmetic instead of loop ...

Most of the time, we will be freeing physical pages within the
full-sized zones. We can do some simple math to find the right zone
immediately instead of looping through the zones, checking each one.

We still do loop through the slack/remainder zones at the end.
There's probably an even nicer way to solve this, but this is already a
nice improvement. :^)

2021-12-11 20:13:32 +01:00

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