Remove all usages of physunmap
Physunmap only specifies the start address, which imposes unnecessary bookkeeping by the kernel. This MR converts all physunmaps to funmaps, and aligns sizes to the page size.
Physunmap only specifies the start address, which imposes unnecessary bookkeeping by the kernel. This MR converts all physunmaps to funmaps, and aligns sizes to the page size.