Re: [PATCH] rust: irq: add missing 'static bound to IRQ callback functions

["Danilo Krummrich" <dakr@kernel.org>]

On Tue Feb 17, 2026 at 11:24 PM CET, Cole Leavitt wrote:
> The Registration<T> and ThreadedRegistration<T> structs require
> T: Handler + 'static and T: ThreadedHandler + 'static respectively.
> However, the callback functions that are used with these registrations
> were missing the corresponding 'static bound:
>
>   - handle_irq_callback<T: Handler>
>   - handle_threaded_irq_callback<T: ThreadedHandler>
>   - thread_fn_callback<T: ThreadedHandler>
>
> This bound inconsistency was previously accepted by rustc, but recent
> compiler versions (1.93+) enforce E0310 more strictly when casting
> raw pointers to references in generic contexts. The callbacks cast a
> *mut c_void to a reference of the registration type, which requires
> T to be valid for 'static when the registration struct requires it.
>
> Add the missing 'static bound to all three callback functions to match
> their registration struct requirements and fix compilation with recent
> rustc versions.
>
> Fixes: 135d40523244 ("rust: irq: add threaded handler support")
> Signed-off-by: Cole Leavitt <cole@unwrap.rs>

Thanks for the patch! "Unfortunately", there is already an equivalent fix for
this on the list.

Link: https://lore.kernel.org/all/20260214092740.3201946-1-lossin@kernel.org/