Jacob Keller <jacob.e.kel...@intel.com> writes:

> diff --git a/submodule.c b/submodule.c
> index 1b5cdfb7e784..36f8fd00c3ce 100644
> --- a/submodule.c
> +++ b/submodule.c
> @@ -333,6 +333,73 @@ static void print_submodule_summary(struct rev_info 
> *rev, FILE *f,
>       strbuf_release(&sb);
>  }
>  
> +void show_submodule_diff(FILE *f, const char *path,
> +             const char *line_prefix,
> +             unsigned char one[20], unsigned char two[20],
> +             unsigned dirty_submodule, const char *meta,
> +             const char *a_prefix, const char *b_prefix,
> +             const char *reset)
> +{
> +     struct child_process cp = CHILD_PROCESS_INIT;
> +     struct strbuf sb = STRBUF_INIT;
> +     struct strbuf submodule_git_dir = STRBUF_INIT;
> +     const char *git_dir, *message = NULL;
> +     int create_dirty_diff = 0;
> +     FILE *diff;
> +     char c;

The variables message, diff and c are not used, are they?
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