Re: Mainline loongarch64 defconfig+Rust build error

[hev]

On Tue, Dec 9, 2025 at 6:58 PM Miguel Ojeda
<miguel.ojeda.sandonis@xxxxxxxxx> wrote:
>
> Hi all,
>
> I am seeing in mainline loongarch64 defconfig+Rust the following build
> error [1].
>
> Cheers,
> Miguel
>
> [1]
>
>  error[E0425]: cannot find value `compat_ptr_ioctl` in crate `bindings`
>      --> drivers/android/binder/rust_binder_main.rs:317:38
>       |
> 317   |         compat_ioctl: Some(bindings::compat_ptr_ioctl),

It looks like the rust binder driver also needs to handle
!CONFIG_COMPAT. Here's a reference for that:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/rust/kernel/miscdevice.rs?h=v6.18#n410

>       |                                      ^^^^^^^^^^^^^^^^ help: a
> function with a similar name exists: `compat_sys_ioctl`
>       |
>      ::: /__w/quick/quick/linux/rust/bindings/bindings_generated.rs:78264:5
>       |
> 78264 |     pub fn compat_sys_ioctl(fd: ffi::c_uint, cmd: ffi::c_uint,
> arg: compat_ulong_t) -> ffi::c_long;
>       |     ----------------------------------------------------------------------------------------------
> similarly named function `compat_sys_ioctl` defined here
>

--
hev