Andreas Kling 143443e0b6 LibGfx: Make Gfx::Bitmap::set_nonvolatile() report allocation failure ...

Making a bitmap non-volatile after being volatile may fail to allocate
physical pages after the kernel stole the old pages in a purge.

This is different from the pages being purged, but reallocated. In that
case, they are simply replaced with zero-fill-on-demand pages as if
they were freshly allocated.

2021-07-25 14:39:25 +02:00

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