1config ROMFS_FS 2 tristate "ROM file system support" 3 depends on BLOCK 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 18config ROMFS_ON_BLOCK 19 bool "Block device-backed ROM file system support" if (ROMFS_ON_MTD && EMBEDDED) 20 depends on ROMFS_FS && BLOCK 21 help 22 This permits ROMFS to use block devices buffered through the page 23 cache as the medium from which to retrieve data. It does not allow 24 direct mapping of the medium. 25 26 If unsure, answer Y. 27 28config ROMFS_ON_MTD 29 bool "MTD-backed ROM file system support" 30 depends on ROMFS_FS 31 depends on MTD=y || (ROMFS_FS=m && MTD) 32 help 33 This permits ROMFS to use MTD based devices directly, without the 34 intercession of the block layer (which may have been disabled). It 35 also allows direct mapping of MTD devices through romfs files under 36 NOMMU conditions if the underlying device is directly addressable by 37 the CPU. 38 39 If unsure, answer Y. 40 41