74         buf: &mut [u8],  in read_at()
76         assert!((buf.len() & 511) == 0);  in read_at()
79         if count * 512 > buf.len() || check_length > 8_usize {  in read_at()
113         let mut buf_ptr = buf as *mut [u8] as *mut usize as usize;  in read_at()
118         let user_buf = verify_area(VirtAddr::new(buf_ptr), buf.len()).is_ok();  in read_at()
120             let x: Vec<u8> = vec![0; buf.len()];  in read_at()
218             buf.copy_from_slice(kbuf);  in read_at()
230         buf: &[u8],  in write_at()
232         assert!((buf.len() & 511) == 0);  in write_at()
235         if count * 512 > buf.len() || check_length > 8 {  in write_at()
276         let mut buf_ptr = buf as *const [u8] as *mut usize as usize;  in write_at()
280         let user_buf = verify_area(VirtAddr::new(buf_ptr), buf.len()).is_ok();  in write_at()
282             let mut x: Vec<u8> = vec![0; buf.len()];  in write_at()
283             x.resize(buf.len(), 0);  in write_at()
284             x.copy_from_slice(buf);  in write_at()
567         buf: &mut [u8],  in read_at_sync()
569         self.inner().read_at(lba_id_start, count, buf)  in read_at_sync()
577         buf: &[u8],  in write_at_sync()
579         self.inner().write_at(lba_id_start, count, buf)  in write_at_sync()