Allow unsafe_op_in_unsafe_fn

Because stdarch has a really large number of unsafe functions with
single-line calls, `unsafe_op_in_unsafe_fn` would end up adding a lot of
noise, so for now we will allow it to migrate to 2024.

library/stdarch/crates/core_arch/src/lib.rs

@@ -3,6 +3,7 @@
 #![allow(dead_code)]
 #![allow(unused_features)]
 #![allow(internal_features)]
+#![allow(unsafe_op_in_unsafe_fn)]
 #![deny(rust_2018_idioms)]
 #![feature(
     custom_inner_attributes,

library/stdarch/crates/std_detect/src/lib.rs

@@ -18,6 +18,7 @@
 #![feature(staged_api, doc_cfg, allow_internal_unstable)]
 #![deny(rust_2018_idioms)]
 #![allow(clippy::shadow_reuse)]
+#![allow(unsafe_op_in_unsafe_fn)]
 #![cfg_attr(test, allow(unused_imports))]
 #![no_std]
 #![allow(internal_features)]

library/stdarch/examples/connect5.rs

@@ -29,6 +29,7 @@
 //! each move.
 
 #![allow(internal_features)]
+#![allow(unsafe_op_in_unsafe_fn)]
 #![feature(avx512_target_feature)]
 #![cfg_attr(target_arch = "x86", feature(stdarch_x86_avx512, stdarch_internal))]
 #![cfg_attr(target_arch = "x86_64", feature(stdarch_x86_avx512, stdarch_internal))]

library/stdarch/examples/hex.rs

@@ -29,6 +29,7 @@
     clippy::cast_sign_loss,
     clippy::missing_docs_in_private_items
 )]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 use std::{
     io::{self, Read},

library/stdarch/examples/wasm.rs

@@ -1,6 +1,7 @@
 //! A simple slab allocator for pages in wasm
 
 #![cfg(target_arch = "wasm32")]
+#![allow(unsafe_op_in_unsafe_fn)]
 
 use std::ptr;