linux-kernel - Re: [PATCH] kunit: Fix 'hooks.o' build by recursing into kunit

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Date:   Mon, 27 Feb 2023 16:25:09 -0500
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     David Gow <davidgow@...gle.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        Rae Moar <rmoar@...gle.com>,
        Daniel Latypov <dlatypov@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kunit: Fix 'hooks.o' build by recursing into kunit

On Fri, Feb 24, 2023 at 8:45 PM 'David Gow' via KUnit Development
<kunit-dev@...glegroups.com> wrote:
>
> KUnit's 'hooks.o' file need to be built-in whenever KUnit is enabled
> (even if CONFIG_KUNIT=m). We'd previously attemtped to do this by adding
> 'kunit/hooks.o' to obj-y in lib/Makefile, but this caused hooks.c to be
> rebuilt even when it was unchanged.
>
> Instead, always recurse into lib/kunit using obj-y when KUnit is
> enabled, and add the hooks there.
>
> Fixes: 7170b7ed6acb ("kunit: Add "hooks" to call into KUnit when it's built as a module").
> Reported-by: Linus Torvalds <torvalds@...ux-foundation.org>
> Link: https://lore.kernel.org/linux-kselftest/CAHk-=wiEf7irTKwPJ0jTMOF3CS-13UXmF6Fns3wuWpOZ_wGyZQ@mail.gmail.com/
> Signed-off-by: David Gow <davidgow@...gle.com>

Reviewed-by: Brendan Higgins <brendanhiggins@...gle.com>