Re: [PATCH] poll: rust: allow poll_table ptrs to be null

["Benno Lossin" <lossin@kernel.org>]

On Fri Jun 20, 2025 at 1:49 PM CEST, Alice Ryhl wrote:
>      ///
>      /// # Safety
>      ///
> -    /// The caller must ensure that for the duration of `'a`, the pointer will point at a valid poll
> -    /// table (as defined in the type invariants).
> -    ///
> -    /// The caller must also ensure that the `poll_table` is only accessed via the returned
> -    /// reference for the duration of `'a`.
> -    pub unsafe fn from_ptr<'a>(ptr: *mut bindings::poll_table) -> &'a mut PollTable {

Returning `Option<&'a mut PollTable>` is not an option? I'd like to
avoid wrapping raw pointers...

---
Cheers,
Benno

> -        // SAFETY: The safety requirements guarantee the validity of the dereference, while the
> -        // `PollTable` type being transparent makes the cast ok.
> -        unsafe { &mut *ptr.cast() }
> -    }