On Wed, Nov 05, 2025 at 03:01:15PM -0800, Mitchell Levy wrote:
> Add bindings necessary to implement a Rust per-CPU variable API,
> specifically per-CPU variable allocation and management of CPU
> preemption.
>
> Signed-off-by: Mitchell Levy <levymitchell0@gmail.com>
Acked-by: Yury Norov (NVIDIA) <yury.norov@gmail.com>
> ---
> rust/helpers/helpers.c | 2 ++
> rust/helpers/percpu.c | 9 +++++++++
> rust/helpers/preempt.c | 14 ++++++++++++++
> 3 files changed, 25 insertions(+)
>
> diff --git a/rust/helpers/helpers.c b/rust/helpers/helpers.c
> index 7cf7fe95e41d..2fc8d26cfe66 100644
> --- a/rust/helpers/helpers.c
> +++ b/rust/helpers/helpers.c
> @@ -31,9 +31,11 @@
> #include "of.c"
> #include "page.c"
> #include "pci.c"
> +#include "percpu.c"
> #include "pid_namespace.c"
> #include "platform.c"
> #include "poll.c"
> +#include "preempt.c"
> #include "property.c"
> #include "rbtree.c"
> #include "rcu.c"
> diff --git a/rust/helpers/percpu.c b/rust/helpers/percpu.c
> new file mode 100644
> index 000000000000..a091389f730f
> --- /dev/null
> +++ b/rust/helpers/percpu.c
> @@ -0,0 +1,9 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/percpu.h>
> +
> +void __percpu *rust_helper_alloc_percpu(size_t sz, size_t align)
> +{
> + return __alloc_percpu(sz, align);
> +}
> +
> diff --git a/rust/helpers/preempt.c b/rust/helpers/preempt.c
> new file mode 100644
> index 000000000000..2c7529528ddd
> --- /dev/null
> +++ b/rust/helpers/preempt.c
> @@ -0,0 +1,14 @@
> +// SPDX-License-Identifier: GPL-2.0
> +
> +#include <linux/preempt.h>
> +
> +void rust_helper_preempt_disable(void)
> +{
> + preempt_disable();
> +}
> +
> +void rust_helper_preempt_enable(void)
> +{
> + preempt_enable();
> +}
> +
>
> --
> 2.34.1