该文件是rt_linux

				#				# Block device driver configuration				#				mainmenu_option next_comment				comment 'Acorn-specific block devices'								if [ "$CONFIG_ARCH_ARC" = "y" -o "$CONFIG_ARCH_A5K" = "y" ]; then				   tristate 'Old Archimedes floppy (1772) support' CONFIG_BLK_DEV_FD1772				   tristate 'MFM harddisk support' CONFIG_BLK_DEV_MFM				   if [ "$CONFIG_BLK_DEV_MFM" != "n" ]; then				      bool '  Autodetect hard drive geometry' CONFIG_BLK_DEV_MFM_AUTODETECT				   fi				fi								endmenu