Re: [PATCH 5/5] shallow: use struct 'shallow_lock' for additional safety

> [...]
> This patch introduces that type as a thin wrapper around 'struct
> lockfile', and updates the two aforementioned functions and their
> callers to use it.
>
> Signed-off-by: Taylor Blau <me@ttaylorr.com>
> ---
> diff --git a/shallow.h b/shallow.h
> @@ -10,12 +10,22 @@ void set_alternate_shallow_file(struct repository *r, const char *path, int over
> +/*
> + * shallow_lock is a thin wrapper around 'struct lock_file' in order to restrict
> + * which locks can be used with '{commit,rollback}_shallow_file()'.
> + */
> +struct shallow_lock {
> +       struct lock_file lk;
> +};