487     pub fn end(&self) -> VirtAddr {  in end()  method
494     pub fn between(start: VirtAddr, end: VirtAddr) -> Option<Self> {  in between()
495         if unlikely(end.data() <= start.data()) {  in between()
498         let size = end.data() - start.data();  in between()
507         let end = self.end().min(other.end());  in intersect()  localVariable
508         return VirtRegion::between(start, end);  in intersect()
549             VirtPageFrame::new(self.end()),  in iter_pages()
565         return Self::between(region.end(), self.end());  in after()
584         return self.start() <= addr && addr < self.end();  in contains()
591             VirtPageFrame::new(self.end()),  in pages()
615     let end = addr.add(size);  in verify_area()  localVariable
616     if unlikely(end.data() < addr.data()) {  in verify_area()
620     if !addr.check_user() || !end.check_user() {  in verify_area()