Re: [PATCH v2 3/5] rust: enable `clippy::ptr_cast_constness` lint

On Sun Mar 9, 2025 at 5:00 PM CET, Tamir Duberstein wrote:

In Rust 1.72.0, Clippy introduced the `ptr_cast_constness` lint [1]:

...

Though `as` casts between raw pointers are not terrible, `pointer::cast_mut` and `pointer::cast_const` are safer because they cannot accidentally cast the pointer to another type.

There are only 2 affected sites:

• `*mut T as *const U as *mut U` becomes `(*mut T).cast()`
• `&self as *const Self as *mut Self` becomes a reference-to-pointer coercion + `(*const Self).cast()`.

Apply these changes and enable the lint -- no functional change intended.

Link: https://rust-lang.github.io/rust-clippy/master/index.html#ptr_cast_constness [1] Signed-off-by: Tamir Duberstein tamird@gmail.com

Reviewed-by: Benno Lossin benno.lossin@proton.me

--- Cheers, Benno

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Makefile | 1 + rust/kernel/block/mq/request.rs | 5 +++-- 2 files changed, 4 insertions(+), 2 deletions(-)