Re: [PATCH v4 03/13] rust: implement `IdArray`, `IdTable` and `RawDeviceId`

[Danilo Krummrich <dakr@kernel.org>]

On Fri, Dec 06, 2024 at 05:14:00PM -0800, Fabien Parent wrote:
> Hi Danilo,
> 
> > +/// Create device table alias for modpost.
> > +#[macro_export]
> > +macro_rules! module_device_table {
> > +    ($table_type: literal, $module_table_name:ident, $table_name:ident) => {
> > +        #[rustfmt::skip]
> > +        #[export_name =
> > +            concat!("__mod_", $table_type,
> > +                    "__", module_path!(),
> > +                    "_", line!(),
> > +                    "_", stringify!($table_name),
> > +                    "_device_table")
> 
> This doesn't work on top of v6.13-rc1. The alias symbol name has been
> renamed by commit 054a9cd395a7 (modpost: rename alias
> symbol for MODULE_DEVICE_TABLE())
> 
> I applied the following change to make it work again:
> -            concat!("__mod_", $table_type,
> +            concat!("__mod_device_table__", $table_type,
>                      "__", module_path!(),
>                      "_", line!(),
> -                    "_", stringify!($table_name),
> -                    "_device_table")
> +                    "_", stringify!($table_name))

Good catch, thanks!

> 
> 
> > +        ]
> > +        static $module_table_name: [core::mem::MaybeUninit<u8>; $table_name.raw_ids().size()] =
> > +            unsafe { core::mem::transmute_copy($table_name.raw_ids()) };
> > +    };
> > +}