create_proc_info_entry

The convenience function

static inline *create_proc_info_entry(
   const char *name,
   mode_t      mode,
   get_info_t *get_info);

is a wrapper to proc_create_entry again:

static inline 
struct proc_dir_entry *create_proc_info_entry(
   const char            *name, 
   mode_t                 mode, 
   struct proc_dir_entry *base, 
   get_info_t            *get_info)
{
   struct proc_dir_entry *res = create_proc_entry(
      name, mode, base);
   if (res) res->get_info=get_info;
   return res;
}

The get_info method itself is a special read method that is not a part of the fops (file operations), it is special in that it is bounded at create time to a defined length; this is visible in the get_info_t type.