# SPDX-License-Identifier: GPL-2.0-only
|
config ROMFS_FS
|
tristate "ROM file system support"
|
depends on BLOCK || MTD
|
help
|
This is a very small read-only file system mainly intended for
|
initial ram disks of installation disks, but it could be used for
|
other read-only media as well. Read
|
<file:Documentation/filesystems/romfs.rst> for details.
|
|
To compile this file system support as a module, choose M here: the
|
module will be called romfs. Note that the file system of your
|
root partition (the one containing the directory /) cannot be a
|
module.
|
|
If you don't know whether you need it, then you don't need it:
|
answer N.
|
|
#
|
# Select the backing stores to be supported
|
#
|
choice
|
prompt "RomFS backing stores"
|
depends on ROMFS_FS
|
default ROMFS_BACKED_BY_BLOCK
|
help
|
Select the backing stores to be supported.
|
|
config ROMFS_BACKED_BY_BLOCK
|
bool "Block device-backed ROM file system support"
|
depends on BLOCK
|
help
|
This permits ROMFS to use block devices buffered through the page
|
cache as the medium from which to retrieve data. It does not allow
|
direct mapping of the medium.
|
|
If unsure, answer Y.
|
|
config ROMFS_BACKED_BY_MTD
|
bool "MTD-backed ROM file system support"
|
depends on MTD=y || (ROMFS_FS=m && MTD)
|
help
|
This permits ROMFS to use MTD based devices directly, without the
|
intercession of the block layer (which may have been disabled). It
|
also allows direct mapping of MTD devices through romfs files under
|
NOMMU conditions if the underlying device is directly addressable by
|
the CPU.
|
|
If unsure, answer Y.
|
|
config ROMFS_BACKED_BY_BOTH
|
bool "Both the above"
|
depends on BLOCK && (MTD=y || (ROMFS_FS=m && MTD))
|
endchoice
|
|
|
config ROMFS_ON_BLOCK
|
bool
|
default y if ROMFS_BACKED_BY_BLOCK || ROMFS_BACKED_BY_BOTH
|
|
config ROMFS_ON_MTD
|
bool
|
default y if ROMFS_BACKED_BY_MTD || ROMFS_BACKED_BY_BOTH
|
