finish current clippy lints to make CI green

generic-rt/src/lib.rs

@@ -1,6 +1,5 @@
 #![no_std]
 #![allow(internal_features)]
-#![feature(core_intrinsics)]
 #![deny(unsafe_op_in_unsafe_fn)]
 
 use core::{

redox-rt/src/proc.rs

@@ -713,6 +713,7 @@ impl<'a> MmapGuard<'a> {
 
         Ok(())
     }
+    #[expect(clippy::mut_from_ref)]
     pub unsafe fn map_mut_anywhere(
         fd: &'a FdGuardUpper,
         offset: usize,

redox-rt/src/sys.rs

@@ -953,6 +953,10 @@ impl FdTbl {
     pub const CONTEXT_MAX_FILES: u32 = 65_536;
     pub const DEFAULT_CAPACITY: usize = usize::BITS as usize;
 
+    #[expect(
+        clippy::new_without_default,
+        reason = "default not expected for this type"
+    )]
     pub const fn new() -> Self {
         Self {
             fd: None,
@@ -1267,6 +1271,10 @@ bitflags::bitflags! {
 }
 
 impl PosixFdTbl {
+    #[expect(
+        clippy::new_without_default,
+        reason = "default not expected for this type"
+    )]
     pub const fn new() -> Self {
         Self {
             table: Vec::new(),
@@ -1595,6 +1603,10 @@ pub struct UpperFdTbl {
 }
 
 impl UpperFdTbl {
+    #[expect(
+        clippy::new_without_default,
+        reason = "default not expected for this type"
+    )]
     pub const fn new() -> Self {
         Self {
             table: Vec::new(),

src/c_str.rs

@@ -258,6 +258,7 @@ impl<'a, T: Kind> NulStr<'a, T> {
     /// Scan the string to get its length.
     #[doc(alias = "strlen")]
     #[doc(alias = "wcslen")]
+    #[expect(clippy::len_without_is_empty, reason = "len() signature intentional")]
     pub fn len(self) -> usize {
         self.to_chars().len()
     }

src/macros.rs

@@ -117,6 +117,7 @@ macro_rules! trace_expr {
 
 // log::trace! but functions inside them will
 // not be evaluated or compiled unless enabled
+#[cfg(target_os = "redox")] // currently only used in redox
 macro_rules! trace_log {
     ($($arg:tt)+) => {
         #[cfg(not(feature = "no_trace"))]