+static inline u32 sect_to_clust(fsdata *fsdata, int sect)
+{
+ return (sect - fsdata->data_begin) / fsdata->clust_size;
+}
+
+int file_fat_detectfs(void);
+int fat_exists(const char *filename);
+int fat_size(const char *filename, loff_t *size);
+int file_fat_read_at(const char *filename, loff_t pos, void *buffer,
+ loff_t maxsize, loff_t *actread);
+int file_fat_read(const char *filename, void *buffer, int maxsize);
+int fat_set_blk_dev(struct blk_desc *rbdd, disk_partition_t *info);
+int fat_register_device(struct blk_desc *dev_desc, int part_no);
+
+int file_fat_write(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actwrite);
+int fat_read_file(const char *filename, void *buf, loff_t offset, loff_t len,
+ loff_t *actread);
+int fat_opendir(const char *filename, struct fs_dir_stream **dirsp);
+int fat_readdir(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
+void fat_closedir(struct fs_dir_stream *dirs);
+void fat_close(void);