Re: [PATCH v1 0/3] kunit: Deferred action helpers

[Benjamin Berg]

On Fri, 2023-04-21 at 16:42 +0800, 'David Gow' via KUnit Development wrote:
> This is v1 of the KUnit deferred actions API, which implements an
> equivalent of devm_add_action[1] on top of KUnit managed resources. This
> provides a simple way of scheduling a function to run when the test
> terminates (whether successfully, or with an error). It's therefore very
> useful for freeing resources, or otherwise cleaning up.
> 
> The notable changes since RFCv2[2] are:
> - Got rid of the 'cancellation token' concept. It was overcomplicated,
>   and we can add it back if we need to.
> - kunit_add_action() therefore now returns 0 on success, and an error
>   otherwise (like devm_add_action()). Though you may wish to use:
> - Added kunit_add_action_or_reset(), which will call the deferred
>   function if an error occurs. (See devm_add_action_or_reset()). This
>   also returns an error on failure, which can be asserted safely.
> - Got rid of the function pointer typedef. Personally, I liked it, but
>   it's more typedef-y than most kernel code.
> - Got rid of the 'internal_gfp' argument: all internal state is now
>   allocated with GFP_KERNEL. The main KUnit resource API can be used
>   instead if this doesn't work for your use-case.
> 
> I'd love to hear any further thoughts!

I am happy with it as-is.

Reviewed-By: Benjamin Berg <benjamin.berg@xxxxxxxxx>

> 
> Cheers,
> -- David
> 
> [1]: https://docs.kernel.org/driver-api/basics.html#c.devm_add_action
> [2]: https://patchwork.kernel.org/project/linux-kselftest/list/?series=735720
> 
> 
> David Gow (3):
>   kunit: Add kunit_add_action() to defer a call until test exit
>   kunit: executor_test: Use kunit_add_action()
>   kunit: kmalloc_array: Use kunit_add_action()
> 
>  include/kunit/resource.h  | 76 +++++++++++++++++++++++++++++++
>  include/kunit/test.h      | 10 ++++-
>  lib/kunit/executor_test.c | 11 ++---
>  lib/kunit/kunit-test.c    | 88 +++++++++++++++++++++++++++++++++++-
>  lib/kunit/resource.c      | 95 +++++++++++++++++++++++++++++++++++++++
>  lib/kunit/test.c          | 48 ++++----------------
>  6 files changed, 279 insertions(+), 49 deletions(-)
> 
> -- 
> 2.40.0.634.g4ca3ef3211-goog
>