1config ROMFS_FS 2 tristate "ROM file system support" 3 depends on BLOCK || MTD 4 ---help--- 5 This is a very small read-only file system mainly intended for 6 initial ram disks of installation disks, but it could be used for 7 other read-only media as well. Read 8 <file:Documentation/filesystems/romfs.txt> for details. 9 10 To compile this file system support as a module, choose M here: the 11 module will be called romfs. Note that the file system of your 12 root partition (the one containing the directory /) cannot be a 13 module. 14 15 If you don't know whether you need it, then you don't need it: 16 answer N. 17 18# 19# Select the backing stores to be supported 20# 21choice 22 prompt "RomFS backing stores" 23 depends on ROMFS_FS 24 default ROMFS_BACKED_BY_BLOCK 25 help 26 Select the backing stores to be supported. 27 28config ROMFS_BACKED_BY_BLOCK 29 bool "Block device-backed ROM file system support" 30 depends on BLOCK 31 help 32 This permits ROMFS to use block devices buffered through the page 33 cache as the medium from which to retrieve data. It does not allow 34 direct mapping of the medium. 35 36 If unsure, answer Y. 37 38config ROMFS_BACKED_BY_MTD 39 bool "MTD-backed ROM file system support" 40 depends on MTD=y || (ROMFS_FS=m && MTD) 41 help 42 This permits ROMFS to use MTD based devices directly, without the 43 intercession of the block layer (which may have been disabled). It 44 also allows direct mapping of MTD devices through romfs files under 45 NOMMU conditions if the underlying device is directly addressable by 46 the CPU. 47 48 If unsure, answer Y. 49 50config ROMFS_BACKED_BY_BOTH 51 bool "Both the above" 52 depends on BLOCK && (MTD=y || (ROMFS_FS=m && MTD)) 53endchoice 54 55 56config ROMFS_ON_BLOCK 57 bool 58 default y if ROMFS_BACKED_BY_BLOCK || ROMFS_BACKED_BY_BOTH 59 60config ROMFS_ON_MTD 61 bool 62 default y if ROMFS_BACKED_BY_MTD || ROMFS_BACKED_BY_BOTH 63