linux-kernel - Re: [PATCH v12 03/18] kunit: test: add string_stream a std::stream like string builder

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Message-ID: <20190812233336.GA224410@google.com>
Date:   Mon, 12 Aug 2019 16:33:36 -0700
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     Stephen Boyd <sboyd@...nel.org>
Cc:     frowand.list@...il.com, gregkh@...uxfoundation.org,
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Subject: Re: [PATCH v12 03/18] kunit: test: add string_stream a std::stream
 like string builder

On Mon, Aug 12, 2019 at 03:55:19PM -0700, Stephen Boyd wrote:
> Quoting Brendan Higgins (2019-08-12 11:24:06)
> > +void string_stream_clear(struct string_stream *stream)
> > +{
> > +       struct string_stream_fragment *frag_container, *frag_container_safe;
> > +
> > +       spin_lock(&stream->lock);
> > +       list_for_each_entry_safe(frag_container,
> > +                                frag_container_safe,
> > +                                &stream->fragments,
> > +                                node) {
> > +               list_del(&frag_container->node);
> 
> Shouldn't we free the allocation here? Otherwise, if some test is going
> to add, add, clear, add, it's going to leak until the test is over?

So basically this means I should add a kunit_kfree and
kunit_resource_destroy (respective equivalents to devm_kfree, and
devres_destroy) and use kunit_kfree here?

> > +       }
> > +       stream->length = 0;
> > +       spin_unlock(&stream->lock);
> > +}
> > +