1 # SPDX-License-Identifier: GPL-2.0-only
2 config ROMFS_FS
3 tristate "ROM file system support"
4 depends on BLOCK || MTD
5 help
6 This is a very small read-only file
7 initial ram disks of installation di
8 other read-only media as well. Read
9 <file:Documentation/filesystems/romf
10
11 To compile this file system support
12 module will be called romfs. Note t
13 root partition (the one containing t
14 module.
15
16 If you don't know whether you need i
17 answer N.
18
19 #
20 # Select the backing stores to be supported
21 #
22 choice
23 prompt "RomFS backing stores"
24 depends on ROMFS_FS
25 default ROMFS_BACKED_BY_BLOCK
26 help
27 Select the backing stores to be supp
28
29 config ROMFS_BACKED_BY_BLOCK
30 bool "Block device-backed ROM file sys
31 depends on BLOCK
32 help
33 This permits ROMFS to use block devi
34 cache as the medium from which to re
35 direct mapping of the medium.
36
37 If unsure, answer Y.
38
39 config ROMFS_BACKED_BY_MTD
40 bool "MTD-backed ROM file system suppo
41 depends on MTD=y || (ROMFS_FS=m && MTD
42 help
43 This permits ROMFS to use MTD based
44 intercession of the block layer (whi
45 also allows direct mapping of MTD de
46 NOMMU conditions if the underlying d
47 the CPU.
48
49 If unsure, answer Y.
50
51 config ROMFS_BACKED_BY_BOTH
52 bool "Both the above"
53 depends on BLOCK && (MTD=y || (ROMFS_F
54 endchoice
55
56
57 config ROMFS_ON_BLOCK
58 bool
59 default y if ROMFS_BACKED_BY_BLOCK ||
60 select BUFFER_HEAD
61
62 config ROMFS_ON_MTD
63 bool
64 default y if ROMFS_BACKED_BY_MTD || RO
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