Merge pull request sched-ext#1179 from devnexen/clippy_fix

scx_utils: addressing few clippy build warnings.

rust/scx_stats/src/server.rs

@@ -436,7 +436,7 @@ where
         loop {
             let mut line = String::new();
             stream_reader.read_line(&mut line)?;
-            if line.len() == 0 {
+            if line.is_empty() {
                 return Ok(());
             }
             if exit.load(Ordering::Relaxed) {

rust/scx_utils/src/compat.rs

@@ -124,7 +124,7 @@ pub fn struct_has_field(type_name: &str, field: &str) -> Result<bool> {
         }
     }
 
-    return Ok(false);
+    Ok(false)
 }
 
 pub fn ksym_exists(ksym: &str) -> Result<bool> {

rust/scx_utils/src/cpumask.rs

@@ -305,7 +305,7 @@ pub struct CpumaskIterator<'a> {
     index: usize,
 }
 
-impl<'a> Iterator for CpumaskIterator<'a> {
+impl Iterator for CpumaskIterator<'_> {
     type Item = usize;
 
     fn next(&mut self) -> Option<Self::Item> {

rust/scx_utils/src/misc.rs

@@ -9,7 +9,7 @@ use std::thread::sleep;
 use std::time::Duration;
 
 pub fn monitor_stats<T>(
-    stats_args: &Vec<(String, String)>,
+    stats_args: &[(String, String)],
     intv: Duration,
     mut should_exit: impl FnMut() -> bool,
     mut output: impl FnMut(T) -> Result<()>,
@@ -42,7 +42,7 @@ where
         retry_cnt = 0;
 
         while !should_exit() {
-            let stats = match client.request::<T>("stats", stats_args.clone()) {
+            let stats = match client.request::<T>("stats", stats_args.to_owned()) {
                 Ok(v) => v,
                 Err(e) => match e.downcast_ref::<std::io::Error>() {
                     Some(ioe) => {