Resolve nightly-2021-10-05 clippy complaints

perf/src/cuda_runtime.rs

@@ -28,12 +28,13 @@ fn pin<T>(_mem: &mut Vec<T>) {
         let err = unsafe {
             (api.cuda_host_register)(ptr as *mut c_void, size, /*flags=*/ 0)
         };
-        if err != CUDA_SUCCESS {
-            panic!(
-                "cudaHostRegister error: {} ptr: {:?} bytes: {}",
-                err, ptr, size,
-            );
-        }
+        assert!(
+            err == CUDA_SUCCESS,
+            "cudaHostRegister error: {} ptr: {:?} bytes: {}",
+            err,
+            ptr,
+            size
+        );
     }
 }
 
@@ -42,9 +43,12 @@ fn unpin<T>(_mem: *mut T) {
         use std::ffi::c_void;
 
         let err = unsafe { (api.cuda_host_unregister)(_mem as *mut c_void) };
-        if err != CUDA_SUCCESS {
-            panic!("cudaHostUnregister returned: {} ptr: {:?}", err, _mem);
-        }
+        assert!(
+            err == CUDA_SUCCESS,
+            "cudaHostUnregister returned: {} ptr: {:?}",
+            err,
+            _mem
+        );
     }
 }
 

perf/src/recycler.rs

@@ -18,7 +18,6 @@ const RECYCLER_SHRINK_WINDOW: usize = 16384;
 #[derive(Debug, Default)]
 struct RecyclerStats {
     total: AtomicUsize,
-    freed: AtomicUsize,
     reuse: AtomicUsize,
     max_gc: AtomicUsize,
 }

perf/src/sigverify.rs

@@ -96,9 +96,7 @@ pub fn init() {
     if let Some(api) = perf_libs::api() {
         unsafe {
             (api.ed25519_set_verbose)(true);
-            if !(api.ed25519_init)() {
-                panic!("ed25519_init() failed");
-            }
+            assert!((api.ed25519_init)(), "ed25519_init() failed");
             (api.ed25519_set_verbose)(false);
         }
     }
@@ -413,7 +411,7 @@ pub fn ed25519_verify_cpu(batches: &mut [Packets]) {
     PAR_THREAD_POOL.install(|| {
         batches
             .into_par_iter()
-            .for_each(|p| p.packets.par_iter_mut().for_each(|p| verify_packet(p)))
+            .for_each(|p| p.packets.par_iter_mut().for_each(verify_packet))
     });
     inc_new_counter_debug!("ed25519_verify_cpu", count);
 }