150     pub fn lookup_gendisk_by_path(&self, path: &str) -> Option<Arc<GenDisk>> {  in lookup_gendisk_by_path()
151         let (devname, partno) = self.path2devname(path)?;  in lookup_gendisk_by_path()
183     fn path2devname<'a>(&self, mut path: &'a str) -> Option<(&'a str, u32)> {  in path2devname()
185         if path.starts_with("/dev/") {  in path2devname()
186             path = path.strip_prefix("/dev/")?;  in path2devname()
191         let mut last_digit = path.len();  in path2devname()
192         while last_digit > 0 && path.chars().nth(last_digit - 1).unwrap().is_ascii_digit() {  in path2devname()
196             return (path, GenDisk::ENTIRE_DISK_IDX).into();  in path2devname()
199         if last_digit < path.len() {  in path2devname()
200             partno = path[last_digit..].parse().ok()?;  in path2devname()
203         let path = &path[..last_digit];  in path2devname()  localVariable
205         Some((path, partno))  in path2devname()