Update all stdarch crates to Rust 2024

.git-blame-ignore-revs

@@ -0,0 +1,4 @@
+# Use `git config blame.ignorerevsfile .git-blame-ignore-revs` to make `git blame` ignore the following commits.
+
+# format with style edition 2024
+fc87bd98d689590a0b6f5ee4110c5b9f962faa66

crates/assert-instr-macro/Cargo.toml

@@ -2,7 +2,7 @@
 name = "assert-instr-macro"
 version = "0.1.0"
 authors = ["Alex Crichton <[email protected]>"]
-edition = "2021"
+edition = "2024"
 
 [lib]
 proc-macro = true

crates/assert-instr-macro/src/lib.rs

@@ -143,7 +143,7 @@ pub fn assert_instr(
         quote! {
             #attrs
             #maybe_allow_deprecated
-            #[no_mangle]
+            #[unsafe(no_mangle)]
             #[inline(never)]
             pub unsafe extern #abi fn #shim_name(#(#inputs),*) #ret {
                 #name::<#(#const_vals),*>(#(#input_vals),*)
@@ -156,7 +156,7 @@ pub fn assert_instr(
 
             #attrs
             #maybe_allow_deprecated
-            #[no_mangle]
+            #[unsafe(no_mangle)]
             #[inline(never)]
             pub unsafe extern #abi fn #shim_name(#(#inputs),*) #ret {
                 // The compiler in optimized mode by default runs a pass called
@@ -202,7 +202,7 @@ struct Invoc {
 
 impl syn::parse::Parse for Invoc {
     fn parse(input: syn::parse::ParseStream<'_>) -> syn::Result<Self> {
-        use syn::{ext::IdentExt, Token};
+        use syn::{Token, ext::IdentExt};
 
         let mut instr = String::new();
         while !input.is_empty() {

crates/core_arch/Cargo.toml

@@ -13,7 +13,7 @@ readme = "README.md"
 keywords = ["core", "simd", "arch", "intrinsics"]
 categories = ["hardware-support", "no-std"]
 license = "MIT OR Apache-2.0"
-edition = "2021"
+edition = "2024"
 
 [badges]
 is-it-maintained-issue-resolution = { repository = "rust-lang/stdarch" }

crates/core_arch/src/aarch64/mte.rs

@@ -2,7 +2,7 @@
 //!
 //! [ACLE documentation](https://arm-software.github.io/acle/main/acle.html#markdown-toc-mte-intrinsics)
 
-extern "unadjusted" {
+unsafe extern "unadjusted" {
     #[cfg_attr(
         any(target_arch = "aarch64", target_arch = "arm64ec"),
         link_name = "llvm.aarch64.irg"