Re: [PATCH v1 0/8] zorro: Improve handling of pointers in zorro_device_id::driver_data

[Geert Uytterhoeven]

Hi Uwe,

On Tue, 26 May 2026 at 16:17, Uwe Kleine-König (The Capable Hub)
<u.kleine-koenig@xxxxxxxxxxxx> wrote:
> this series is about improving the handling of pointers in struct
> zorro_device_id's driver_data.
>
> While it's ok on all current Linux platforms to store a pointer in an
> unsigned long variable, it involves casting that loses type information.
> This can be nicely seen in patch #7 where after profiting from patch #6
> the compiler notices a missing const.
>
> Preparing for that change, all zorro_device_ids are converted to use
> named initializers, which is also a nice cleanup that could stand for
> itself, as it improves readability for humans. (That is necessary
> because an anonymous union can be initialized by name, but not using a
> list initializer.)
>
> My motivation for this series is the CHERI hardware extension. With that
> pointers are bigger than longs and thus you cannot store pointers in
> zorro_device_id::driver_data. So this series is also about getting
> support for CHERI into the mainline, but I hope the clean up effects
> mentioned above are justification enough to accept this series.

Thanks for your series!

> The dependencies in this series are as follows:
>
>  - Patch #5 depends on #1, #2

s/5/6/?

>  - Patches #7 and #8 depend on patch #6.
>
> So if the ata maintainers agreed to merge their patch #1 via scsi, and
> Geert agrees to patch #5 and that it's also merged via scsi, patches #1,

s/5/6/?

> #2, #6 and #7 can go in without further coordination.
>
> Patches #3, #4 and #5 are only about using the same initialization style
> for all zorro_device_id and can go in without coordination.
>
> Best regards
> Uwe
>
> Uwe Kleine-König (The Capable Hub) (8):
>   ata: pata_budda: Use named initializer for zorro_device_id
>   scsi: Use named initializer for zorro_device_id
>   net: Use named initializer for zorro_device_id arrays
>   i2c: icy: Use named initializer for zorro_device_id arrays
>   video: fm2fb: Use named initializer for zorro_device_id array
>   zorro: Simplify storing pointers in device id struct
>   scsi: zorro7xx: Make use of struct zorro_device_id::driver_data_ptr
>   video: cirrusfb: Make use of struct zorro_device_id::driver_data_ptr

Gr{oetje,eeting}s,

                        Geert


--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds