Fix clippy warnings and run it on CI

.github/workflows/build.yml

@@ -54,6 +54,15 @@ jobs:
     - name: 'Verify no_std build'
       run: cargo build --target thumbv7em-none-eabihf
 
+  clippy:
+    name: "Clippy"
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+    - uses: actions/checkout@v7
+    - run: rustup component add clippy
+    - run: cargo clippy --all-targets --all-features -- -D warnings
+
   check_formatting:
     name: "Check Formatting"
     runs-on: ubuntu-latest

src/rw_spinlock.rs

@@ -447,14 +447,10 @@ mod tests {
         let lock = RwSpinlock::new(0isize);
         let read_guard = lock.read();
 
-        let write_result = lock.try_write();
-        match write_result {
-            None => (),
-            Some(_) => assert!(
-                false,
-                "try_write should not succeed while read_guard is in scope"
-            ),
-        }
+        assert!(
+            lock.try_write().is_none(),
+            "try_write should not succeed while read_guard is in scope"
+        );
 
         drop(read_guard);
     }