linux-kernel - Re: [PATCH] kunit: Move kunit_abort() call out of kunit_do_failed

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Message-ID: <7faac99b-8bb9-4015-9b64-789587542d20@kili.mountain>
Date:   Wed, 31 May 2023 10:50:59 +0300
From:   Dan Carpenter <dan.carpenter@...aro.org>
To:     David Gow <davidgow@...gle.com>
Cc:     Miguel Ojeda <ojeda@...nel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Brendan Higgins <brendan.higgins@...ux.dev>,
        Rae Moar <rmoar@...gle.com>,
        Daniel Latypov <dlatypov@...gle.com>,
        kunit-dev@...glegroups.com, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kunit: Move kunit_abort() call out of
 kunit_do_failed_assertion()

On Wed, May 31, 2023 at 01:21:57PM +0800, David Gow wrote:
> KUnit aborts the current thread when an assertion fails. Currently, this
> is done conditionally as part of the kunit_do_failed_assertion()
> function, but this hides the kunit_abort() call from the compiler
> (particularly if it's in another module). This, in turn, can lead to
> both suboptimal code generation (the compiler can't know if
> kunit_do_failed_assertion() will return), and to static analysis tools
> like smatch giving false positives.
> 
> Moving the kunit_abort() call into the macro should give the compiler
> and tools a better chance at understanding what's going on. Doing so
> requires exporting kunit_abort(), though it's recommended to continue to
> use assertions in lieu of aborting directly.
> 
> In addition, kunit_abort() and kunit_do_failed_assertion() are renamed
> to make it clear they they're intended for internal KUnit use, to:
> __kunit_do_failed_assertion() and __kunit_abort()
> 
> Suggested-by: Dan Carpenter <dan.carpenter@...aro.org>
> Signed-off-by: David Gow <davidgow@...gle.com>

Fantastic!  Thanks so much!

regards,
dan carpenter