From 0f5878834d6ce97426219b64c02a2c4081419d53 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Mon, 13 Oct 2025 02:14:22 +0200 Subject: [PATCH] rust: bitmap: clean Rust 1.92.0 `unused_unsafe` warning Starting with Rust 1.92.0 (expected 2025-12-11), Rust allows to safely take the address of a union field [1][2]: CLIPPY L rust/kernel.o error: unnecessary `unsafe` block --> rust/kernel/bitmap.rs:169:13 | 169 | unsafe { core::ptr::addr_of!(self.repr.bitmap) } | ^^^^^^ unnecessary `unsafe` block | = note: `-D unused-unsafe` implied by `-D warnings` = help: to override `-D warnings` add `#[allow(unused_unsafe)]` error: unnecessary `unsafe` block --> rust/kernel/bitmap.rs:185:13 | 185 | unsafe { core::ptr::addr_of_mut!(self.repr.bitmap) } | ^^^^^^ unnecessary `unsafe` block Thus allow both instances to clean the warning in newer compilers. Link: https://github.com/rust-lang/rust/issues/141264 [1] Link: https://github.com/rust-lang/rust/pull/141469 [2] Signed-off-by: Miguel Ojeda Reviewed-by: Alice Ryhl Signed-off-by: Yury Norov (NVIDIA) --- rust/kernel/bitmap.rs | 2 ++ 1 file changed, 2 insertions(+) diff --git a/rust/kernel/bitmap.rs b/rust/kernel/bitmap.rs index f45915694454..711b8368b38f 100644 --- a/rust/kernel/bitmap.rs +++ b/rust/kernel/bitmap.rs @@ -166,6 +166,7 @@ impl core::ops::Deref for BitmapVec { fn deref(&self) -> &Bitmap { let ptr = if self.nbits <= BITS_PER_LONG { // SAFETY: Bitmap is represented inline. + #[allow(unused_unsafe, reason = "Safe since Rust 1.92.0")] unsafe { core::ptr::addr_of!(self.repr.bitmap) } } else { // SAFETY: Bitmap is represented as array of `unsigned long`. @@ -182,6 +183,7 @@ impl core::ops::DerefMut for BitmapVec { fn deref_mut(&mut self) -> &mut Bitmap { let ptr = if self.nbits <= BITS_PER_LONG { // SAFETY: Bitmap is represented inline. + #[allow(unused_unsafe, reason = "Safe since Rust 1.92.0")] unsafe { core::ptr::addr_of_mut!(self.repr.bitmap) } } else { // SAFETY: Bitmap is represented as array of `unsigned long`. -- 2.47.3