rust: convert raw URLs to Markdown autolinks in comments

Some comments in Rust files use raw URLs (http://example.com) rather
than Markdown autolinks <URL>. This inconsistency makes the
documentation less uniform and harder to maintain.

This patch converts all remaining raw URLs in Rust code comments to use
the Markdown autolink format, maintaining consistency with the rest of
the codebase which already uses this style.

Suggested-by: Miguel Ojeda <ojeda@kernel.org>
Link: #1153
Signed-off-by: Xizhe Yin <xizheyin@smail.nju.edu.cn>
Link: https://lore.kernel.org/r/509F0B66E3C1575D+20250407033441.5567-1-xizheyin@smail.nju.edu.cn
[ Used From form for Signed-off-by. Sorted tags. - Miguel ]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>

Author: xizheyin

rust/kernel/alloc/kbox.rs

@@ -101,7 +101,7 @@ pub type VBox<T> = Box<T, super::allocator::Vmalloc>;
 pub type KVBox<T> = Box<T, super::allocator::KVmalloc>;
 
 // SAFETY: All zeros is equivalent to `None` (option layout optimization guarantee:
-// https://doc.rust-lang.org/stable/std/option/index.html#representation).
+// <https://doc.rust-lang.org/stable/std/option/index.html#representation>).
 unsafe impl<T, A: Allocator> ZeroableOption for Box<T, A> {}
 
 // SAFETY: `Box` is `Send` if `T` is `Send` because the `Box` owns a `T`.

rust/kernel/block/mq/gen_disk.rs

@@ -129,7 +129,7 @@ impl GenDiskBuilder {
             get_unique_id: None,
             // TODO: Set to THIS_MODULE. Waiting for const_refs_to_static feature to
             // be merged (unstable in rustc 1.78 which is staged for linux 6.10)
-            // https://github.com/rust-lang/rust/issues/119618
+            // <https://github.com/rust-lang/rust/issues/119618>
             owner: core::ptr::null_mut(),
             pr_ops: core::ptr::null_mut(),
             free_disk: None,

rust/kernel/std_vendor.rs

@@ -148,7 +148,7 @@ macro_rules! dbg {
     };
     ($val:expr $(,)?) => {
         // Use of `match` here is intentional because it affects the lifetimes
-        // of temporaries - https://stackoverflow.com/a/48732525/1063961
+        // of temporaries - <https://stackoverflow.com/a/48732525/1063961>
         match $val {
             tmp => {
                 $crate::pr_info!("[{}:{}:{}] {} = {:#?}\n",

rust/kernel/sync/arc.rs

@@ -135,7 +135,7 @@ pub struct Arc<T: ?Sized> {
     // meaningful with respect to dropck - but this may change in the future so this is left here
     // out of an abundance of caution.
     //
-    // See https://doc.rust-lang.org/nomicon/phantom-data.html#generic-parameters-and-drop-checking
+    // See <https://doc.rust-lang.org/nomicon/phantom-data.html#generic-parameters-and-drop-checking>
     // for more detail on the semantics of dropck in the presence of `PhantomData`.
     _p: PhantomData<ArcInner<T>>,
 }

scripts/generate_rust_target.rs

@@ -209,7 +209,7 @@ fn main() {
             // target feature of the same name plus the other two target features in
             // `clang/lib/Driver/ToolChains/Arch/X86.cpp`. These should be eventually enabled via
             // `-Ctarget-feature` when `rustc` starts recognizing them (or via a new dedicated
-            // flag); see https://github.com/rust-lang/rust/issues/116852.
+            // flag); see <https://github.com/rust-lang/rust/issues/116852>.
             features += ",+retpoline-external-thunk";
             features += ",+retpoline-indirect-branches";
             features += ",+retpoline-indirect-calls";
@@ -218,7 +218,7 @@ fn main() {
             // The kernel uses `-mharden-sls=all`, which Clang maps to both these target features in
             // `clang/lib/Driver/ToolChains/Arch/X86.cpp`. These should be eventually enabled via
             // `-Ctarget-feature` when `rustc` starts recognizing them (or via a new dedicated
-            // flag); see https://github.com/rust-lang/rust/issues/116851.
+            // flag); see <https://github.com/rust-lang/rust/issues/116851>.
             features += ",+harden-sls-ijmp";
             features += ",+harden-sls-ret";
         }