6.12-stable review patch. If anyone has any objections, please let me know.
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From: Miguel Ojeda ojeda@kernel.org
commit c28bfe76e4ba707775a205b0274710de7aa1e31c upstream.
In Rust 1.67.0, Clippy added the `unnecessary_safety_comment` lint [1], which is the "inverse" of `undocumented_unsafe_blocks`: it finds places where safe code has a `// SAFETY` comment attached.
The lint currently finds 3 places where we had such mistakes, thus it seems already quite useful.
Thus clean those and enable it.
Link: https://rust-lang.github.io/rust-clippy/master/index.html#/unnecessary_safet... [1] Reviewed-by: Alice Ryhl aliceryhl@google.com Reviewed-by: Trevor Gross tmgross@umich.edu Reviewed-by: Vincenzo Palazzo vincenzopalazzodev@gmail.com Tested-by: Gary Guo gary@garyguo.net Reviewed-by: Gary Guo gary@garyguo.net Link: https://lore.kernel.org/r/20240904204347.168520-6-ojeda@kernel.org Signed-off-by: Miguel Ojeda ojeda@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- Makefile | 1 + rust/kernel/sync/arc.rs | 2 +- rust/kernel/workqueue.rs | 4 ++-- 3 files changed, 4 insertions(+), 3 deletions(-)
--- a/Makefile +++ b/Makefile @@ -459,6 +459,7 @@ export rust_common_flags := --edition=20 -Aclippy::needless_lifetimes \ -Wclippy::no_mangle_with_rust_abi \ -Wclippy::undocumented_unsafe_blocks \ + -Wclippy::unnecessary_safety_comment \ -Wrustdoc::missing_crate_level_docs
KBUILD_HOSTCFLAGS := $(KBUILD_USERHOSTCFLAGS) $(HOST_LFS_CFLAGS) \ --- a/rust/kernel/sync/arc.rs +++ b/rust/kernel/sync/arc.rs @@ -338,7 +338,7 @@ impl<T: 'static> ForeignOwnable for Arc< }
unsafe fn borrow<'a>(ptr: *const core::ffi::c_void) -> ArcBorrow<'a, T> { - // SAFETY: By the safety requirement of this function, we know that `ptr` came from + // By the safety requirement of this function, we know that `ptr` came from // a previous call to `Arc::into_foreign`. let inner = NonNull::new(ptr as *mut ArcInner<T>).unwrap();
--- a/rust/kernel/workqueue.rs +++ b/rust/kernel/workqueue.rs @@ -526,7 +526,7 @@ where T: HasWork<T, ID>, { unsafe extern "C" fn run(ptr: *mut bindings::work_struct) { - // SAFETY: The `__enqueue` method always uses a `work_struct` stored in a `Work<T, ID>`. + // The `__enqueue` method always uses a `work_struct` stored in a `Work<T, ID>`. let ptr = ptr as *mut Work<T, ID>; // SAFETY: This computes the pointer that `__enqueue` got from `Arc::into_raw`. let ptr = unsafe { T::work_container_of(ptr) }; @@ -573,7 +573,7 @@ where T: HasWork<T, ID>, { unsafe extern "C" fn run(ptr: *mut bindings::work_struct) { - // SAFETY: The `__enqueue` method always uses a `work_struct` stored in a `Work<T, ID>`. + // The `__enqueue` method always uses a `work_struct` stored in a `Work<T, ID>`. let ptr = ptr as *mut Work<T, ID>; // SAFETY: This computes the pointer that `__enqueue` got from `Arc::into_raw`. let ptr = unsafe { T::work_container_of(ptr) };