467 pub struct VirtRegion {  struct
473 impl VirtRegion {  argument
476         VirtRegion { start, size }  in new()
499         return Some(VirtRegion::new(start, size));  in between()
505     pub fn intersect(&self, other: &VirtRegion) -> Option<VirtRegion> {  in intersect()  argument
508         return VirtRegion::between(start, end);  in intersect()
537         return VirtRegion::new(self.start, round_up_to_page_size(self.size));  in round_up_size_to_page()
542     pub fn collide(&self, other: &VirtRegion) -> bool {  in collide()
556     pub fn before(self, region: &VirtRegion) -> Option<Self> {  in before()
563     pub fn after(self, region: &VirtRegion) -> Option<Self> {  in after()
573     pub fn rebase(self, vaddr: VirtAddr, new_base: &VirtRegion) -> Option<VirtAddr> {  in rebase()
596 impl PartialOrd for VirtRegion {  implementation
602 impl Ord for VirtRegion {  implementation