ksud: fix clippy

userspace/ksud/src/sepolicy.rs

@@ -376,19 +376,14 @@ const CMD_TYPE_TRANSITION: u32 = 7;
 const CMD_TYPE_CHANGE: u32 = 8;
 const CMD_GENFSCON: u32 = 9;
 
-#[derive(Debug)]
+#[derive(Debug, Default)]
 enum PolicyObject {
     All, // for "*", stand for all objects, and is NULL in ffi
     One([u8; SEPOLICY_MAX_LEN]),
+    #[default]
     None,
 }
 
-impl Default for PolicyObject {
-    fn default() -> Self {
-        PolicyObject::None
-    }
-}
-
 impl TryFrom<&str> for PolicyObject {
     type Error = anyhow::Error;
     fn try_from(s: &str) -> Result<Self> {

userspace/ksud/src/utils.rs

@@ -101,7 +101,7 @@ pub fn get_zip_uncompressed_size(zip_path: &str) -> Result<u64> {
 pub fn switch_mnt_ns(pid: i32) -> Result<()> {
     use anyhow::ensure;
     use std::os::fd::AsRawFd;
-    let path = format!("/proc/{}/ns/mnt", pid);
+    let path = format!("/proc/{pid}/ns/mnt");
     let fd = std::fs::File::open(path)?;
     let ret = unsafe { libc::setns(fd.as_raw_fd(), libc::CLONE_NEWNS) };
     ensure!(ret == 0, "switch mnt ns failed");