extern void	pstore_set_kmsg_bytes(int);

  extern void	pstore_get_records(int);

  extern int	pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
  			      char *data, size_t size,

  			      struct timespec time, struct pstore_info *psi);

  extern int	pstore_is_mounted(void);