Re: [PATCH v4] rust: sync: Accept errors for Lock payload data

["Gary Guo" <gary@garyguo.net>]

On Fri Oct 23, 2026 at 12:07 AM CST, Philipp Stanner wrote:
> The `Lock` baseclass currently does not allow for fallible user-data.
> This can cause conflicts when used with other primitives, for example
> when a lock shall be pin-initialized with payload data that is fallible.
>
> Add support for the lock base class so that it works with
> try_pin_init!(). Adjust spinlock and mutex accordingly.
>
> Signed-off-by: Philipp Stanner <phasta@kernel.org>

Reviewed-by: Gary Guo <gary@garyguo.net>

> ---
> Changes in v4:
>   - Do imports at appropriate places. (Gary)
>   - Remove unnecessary changes from pin_init to try_pin_init. (Gary)
>   - re-run rustfmt.
>
> Changes in v3:
>   - Vertical formatting for imports
>
> Changes in v2:
>   - Don't import prelude in doctests. (Gary)
>   - Keep using pin_init! over try_pin_init! in Lock::new(). (Gary)
> ---
>  rust/kernel/sync/lock.rs          | 28 +++++++++++++++++++++-------
>  rust/kernel/sync/lock/spinlock.rs |  5 +----
>  2 files changed, 22 insertions(+), 11 deletions(-)