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Commit | Line | Data |
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1 | config 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 | # | |
21 | choice | |
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 | ||
28 | config 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 | ||
38 | config 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 | ||
50 | config ROMFS_BACKED_BY_BOTH | |
51 | bool "Both the above" | |
52 | depends on BLOCK && (MTD=y || (ROMFS_FS=m && MTD)) | |
53 | endchoice | |
54 | ||
55 | ||
56 | config ROMFS_ON_BLOCK | |
57 | bool | |
58 | default y if ROMFS_BACKED_BY_BLOCK || ROMFS_BACKED_BY_BOTH | |
59 | ||
60 | config ROMFS_ON_MTD | |
61 | bool | |
62 | default y if ROMFS_BACKED_BY_MTD || ROMFS_BACKED_BY_BOTH |