struct diff_filespec;
struct userdiff_driver;
struct sha1_array;
+struct commit;
typedef void (*change_fn_t)(struct diff_options *options,
unsigned old_mode, unsigned new_mode,
extern void diff_tree_combined(const unsigned char *sha1, const struct sha1_array *parents, int dense, struct rev_info *rev);
-extern void diff_tree_combined_merge(const unsigned char *sha1, int, struct rev_info *);
+extern void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);