Re: [PATCH] rust/drm/gem: initialize callbacks with ..pin_init::zeroed()

[Gary Guo]

On Tue Sep 8, 2026 at 6:54 PM BST, Klara Modin wrote:
> When the commit b67d2d039f64 ("drm/gem: Add callback for when handle
> count goes to 0") added the handle_free callback, it did not update the
> rust abstraction, which will cause a build failure when that is enabled.
> Rather than just adding another None initializer, use
> ..pin_init::zeroed() to make all unlisted callbacks None, and remove the
> existing None-initializations.
>
> Fixes: b67d2d039f64 ("drm/gem: Add callback for when handle count goes to 0")
> Reported-by: Thorsten Leemhuis <linux@xxxxxxxxxxxxx>
> Closes: https://lore.kernel.org/all/aaef18cd-ab55-4fb8-8563-ca3a5ea9cbc6@xxxxxxxxxxxxx
> Suggested-by: Gary Guo <gary@xxxxxxxxxxx>
> Signed-off-by: Klara Modin <klarasmodin@xxxxxxxxx>
> ---
>  rust/kernel/drm/gem/mod.rs | 12 +-----------
>  1 file changed, 1 insertion(+), 11 deletions(-)
>
> diff --git a/rust/kernel/drm/gem/mod.rs b/rust/kernel/drm/gem/mod.rs
> index 80d8f524f9d5..af8274134a71 100644
> --- a/rust/kernel/drm/gem/mod.rs
> +++ b/rust/kernel/drm/gem/mod.rs
> @@ -266,18 +266,8 @@ impl<T: DriverObject, Ctx: DeviceContext> Object<T, Ctx> {
>          free: Some(Self::free_callback),
>          open: Some(open_callback::<T>),
>          close: Some(close_callback::<T>),
> -        print_info: None,
> -        export: None,
> -        pin: None,
> -        unpin: None,
> -        get_sg_table: None,
> -        vmap: None,
> -        vunmap: None,
> -        mmap: None,
> -        status: None,
>          vm_ops: core::ptr::null_mut(),

This line can be gone too.

Best,
Gary

> -        evict: None,
> -        rss: None,
> +        ..pin_init::zeroed()
>      };
>  
>      /// Returns the `Device` that owns this GEM object.