301         len: usize,  in mmap()
330                 len,  in mmap()
340                 len,  in mmap()
450     pub fn munmap(start_vaddr: VirtAddr, len: usize) -> Result<usize, SystemError> {  in munmap()
452         assert!(check_aligned(len, MMArch::PAGE_SIZE));  in munmap()
454         if unlikely(verify_area(start_vaddr, len).is_err()) {  in munmap()
457         if unlikely(len == 0) {  in munmap()
463         let page_count = PageFrameCount::new(len / MMArch::PAGE_SIZE);  in munmap()
482         len: usize,  in mprotect()
486         assert!(check_aligned(len, MMArch::PAGE_SIZE));  in mprotect()
488         if unlikely(verify_area(start_vaddr, len).is_err()) {  in mprotect()
491         if unlikely(len == 0) {  in mprotect()
499         let page_count = PageFrameCount::new(len / MMArch::PAGE_SIZE);  in mprotect()
517         len: usize,  in madvise()
520         if !start_vaddr.check_aligned(MMArch::PAGE_SIZE) || !check_aligned(len, MMArch::PAGE_SIZE) {  in madvise()
524         if unlikely(verify_area(start_vaddr, len).is_err()) {  in madvise()
527         if unlikely(len == 0) {  in madvise()
535         let page_count = PageFrameCount::new(len / MMArch::PAGE_SIZE);  in madvise()
551     pub fn msync(start: VirtAddr, len: usize, flags: usize) -> Result<usize, SystemError> {  in msync()
552         if !start.check_aligned(MMArch::PAGE_SIZE) || !check_aligned(len, MMArch::PAGE_SIZE) {  in msync()
556         if unlikely(verify_area(start, len).is_err()) {  in msync()
559         if unlikely(len == 0) {  in msync()
564         let end = start + len;  in msync()
623                         err = file.write(len, unsafe {  in msync()