Re: [PATCH 1/2] rust: add a wrapper for the `num_possible_cpus` C function

[Dirk Behme]

On 15.02.2026 21:10, Andreas Hindborg wrote:
> This function returns the max number of CPUs that can be online.
>
> Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxx>
> ---
>   rust/helpers/helpers.c  | 1 +
>   rust/helpers/num_cpus.c | 8 ++++++++
>   rust/kernel/lib.rs      | 6 ++++++
>   3 files changed, 15 insertions(+)
>
> diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
> index 79c72762ad9c4..a19d6562fcb3a 100644
> --- a/rust/helpers/helpers.c
> +++ b/rust/helpers/helpers.c
> @@ -35,6 +35,7 @@
>   #include "maple_tree.c"
>   #include "mm.c"
>   #include "mutex.c"
> +#include "num_cpus.c"
>   #include "of.c"
>   #include "page.c"
>   #include "pci.c"
> diff --git a/rust/helpers/num_cpus.c b/rust/helpers/num_cpus.c
> new file mode 100644
> index 0000000000000..daddacb0418d8
> --- /dev/null
> +++ b/rust/helpers/num_cpus.c
> @@ -0,0 +1,8 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/cpumask.h>
> +
> +unsigned int rust_helper_num_possible_cpus(void)

Should we add `__rust_helper` here?

Thanks

Dirk