Re: [PATCH RFC v2 5/5] last-modified: initialize revision machinery without walk

> In a previous commit we inserted a call to 'prepare_revision_walk()'
> before we started our traversal. This was done when we leveraged the
> revision machinery more (at the time, we were leaning on
> 'log_tree_commit()' which only worked after calling
> 'prepare_revision_walk()').
> 
> But, we have since dropped 'log_tree_commit()', so we don't need most of
> the initialization work of 'prepare_revision_walk()'. Now we ask it to
> do very little work during initialization by setting the '->no_walk'
> flag to '1', which leaves its internal state alone enough that we can
> still function as normal.
> 
> Unfortunately, this means that we now no longer complain about
> non-commit inputs, since the revision machinery check this for us (it
> just silently ignores them).