Fix clippy

src/memory/brk.rs

@@ -26,7 +26,7 @@ pub async fn sys_brk(addr: VA) -> Result<usize, Infallible> {
     // The query case `brk(0)` is special and is handled separately from modifications.
     if addr.is_null() {
         let current_brk_val = vm.current_brk().value();
-        return Ok(current_brk_val as usize);
+        return Ok(current_brk_val);
     }
 
     // For non-null addresses, attempt to resize the break.
@@ -39,7 +39,7 @@ pub async fn sys_brk(addr: VA) -> Result<usize, Infallible> {
         // The contract is to return the current, unchanged break address.
         Err(_) => {
             let current_brk_val = vm.current_brk().value();
-            Ok(current_brk_val as usize)
+            Ok(current_brk_val)
         }
     }
 }

src/process/ptrace.rs

@@ -123,13 +123,10 @@ impl PTrace {
             None => 0,
             Some(PTraceState::Running) => 0,
             // No masking for real signal delivery.
-            Some(PTraceState::SignalTrap { signal, .. }) => {
-                if signal.is_stopping() {
-                    (PTRACE_EVENT_STOP as i32) << 8
-                } else {
-                    0
-                }
+            Some(PTraceState::SignalTrap { signal, .. }) if signal.is_stopping() => {
+                (PTRACE_EVENT_STOP as i32) << 8
             }
+            Some(PTraceState::SignalTrap { .. }) => 0,
             Some(PTraceState::TracePointHit { hit_point, .. }) => match hit_point {
                 TracePoint::SyscallEntry | TracePoint::SyscallExit => {
                     if self.sysgood {