const char * const usagestr[]);
extern int handle_revision_arg(const char *arg, struct rev_info *revs,int flags,int cant_be_filename);
+extern void reset_revision_walk(void);
extern int prepare_revision_walk(struct rev_info *revs);
extern struct commit *get_revision(struct rev_info *revs);
extern char *get_revision_mark(const struct rev_info *revs, const struct commit *commit);