2 tristate "ROM file system support"
3 depends on BLOCK || MTD
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.
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
15 If you don't know whether you need it, then you don't need it:
19 # Select the backing stores to be supported
22 prompt "RomFS backing stores"
24 default ROMFS_BACKED_BY_BLOCK
26 Select the backing stores to be supported.
28 config ROMFS_BACKED_BY_BLOCK
29 bool "Block device-backed ROM file system support"
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.
38 config ROMFS_BACKED_BY_MTD
39 bool "MTD-backed ROM file system support"
40 depends on MTD=y || (ROMFS_FS=m && MTD)
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
50 config ROMFS_BACKED_BY_BOTH
52 depends on BLOCK && (MTD=y || (ROMFS_FS=m && MTD))
58 default y if ROMFS_BACKED_BY_BLOCK || ROMFS_BACKED_BY_BOTH
62 default y if ROMFS_BACKED_BY_MTD || ROMFS_BACKED_BY_BOTH