projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ec8f24b7 | 1 | # SPDX-License-Identifier: GPL-2.0-only |
| 41810246 AD |
2 | config ROMFS_FS |
| 3 | tristate "ROM file system support" | |
| f52fd5b7 | 4 | depends on BLOCK || MTD |
| a7f7f624 | 5 | help |
| 41810246 AD |
6 | This is a very small read-only file system mainly intended for |
| 7 | initial ram disks of installation disks, but it could be used for | |
| 8 | other read-only media as well. Read | |
| 0c1bc6b8 | 9 | <file:Documentation/filesystems/romfs.rst> for details. |
| 41810246 AD |
10 | |
| 11 | To compile this file system support as a module, choose M here: the | |
| 12 | module will be called romfs. Note that the file system of your | |
| 13 | root partition (the one containing the directory /) cannot be a | |
| 14 | module. | |
| 15 | ||
| 16 | If you don't know whether you need it, then you don't need it: | |
| 17 | answer N. | |
| da4458bd | 18 | |
| f52fd5b7 DH |
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 supported. | |
| 28 | ||
| 29 | config ROMFS_BACKED_BY_BLOCK | |
| 30 | bool "Block device-backed ROM file system support" | |
| 31 | depends on BLOCK | |
| da4458bd DH |
32 | help |
| 33 | This permits ROMFS to use block devices buffered through the page | |
| 34 | cache as the medium from which to retrieve data. It does not allow | |
| 35 | direct mapping of the medium. | |
| 36 | ||
| 37 | If unsure, answer Y. | |
| 38 | ||
| f52fd5b7 | 39 | config ROMFS_BACKED_BY_MTD |
| da4458bd | 40 | bool "MTD-backed ROM file system support" |
| da4458bd DH |
41 | depends on MTD=y || (ROMFS_FS=m && MTD) |
| 42 | help | |
| 43 | This permits ROMFS to use MTD based devices directly, without the | |
| 44 | intercession of the block layer (which may have been disabled). It | |
| 45 | also allows direct mapping of MTD devices through romfs files under | |
| 46 | NOMMU conditions if the underlying device is directly addressable by | |
| 47 | the CPU. | |
| 48 | ||
| 49 | If unsure, answer Y. | |
| 50 | ||
| f52fd5b7 DH |
51 | config ROMFS_BACKED_BY_BOTH |
| 52 | bool "Both the above" | |
| 53 | depends on BLOCK && (MTD=y || (ROMFS_FS=m && MTD)) | |
| 54 | endchoice | |
| 55 | ||
| 56 | ||
| 57 | config ROMFS_ON_BLOCK | |
| 58 | bool | |
| 59 | default y if ROMFS_BACKED_BY_BLOCK || ROMFS_BACKED_BY_BOTH | |
| 60 | ||
| 61 | config ROMFS_ON_MTD | |
| 62 | bool | |
| 63 | default y if ROMFS_BACKED_BY_MTD || ROMFS_BACKED_BY_BOTH |