1 # SPDX-License-Identifier: GPL-2.0-only <<
2 config CRAMFS 1 config CRAMFS
3 tristate "Compressed ROM file system s 2 tristate "Compressed ROM file system support (cramfs)"
>> 3 depends on BLOCK
4 select ZLIB_INFLATE 4 select ZLIB_INFLATE
5 help 5 help
6 Saying Y here includes support for C 6 Saying Y here includes support for CramFs (Compressed ROM File
7 System). CramFs is designed to be a 7 System). CramFs is designed to be a simple, small, and compressed
8 file system for ROM based embedded s 8 file system for ROM based embedded systems. CramFs is read-only,
9 limited to 256MB file systems (with 9 limited to 256MB file systems (with 16MB files), and doesn't support
10 16/32 bits uid/gid, hard links and t 10 16/32 bits uid/gid, hard links and timestamps.
11 11
12 See <file:Documentation/filesystems/ !! 12 See <file:Documentation/filesystems/cramfs.txt> and
13 <file:fs/cramfs/README> for further 13 <file:fs/cramfs/README> for further information.
14 14
15 To compile this as a module, choose 15 To compile this as a module, choose M here: the module will be called
16 cramfs. Note that the root file sys 16 cramfs. Note that the root file system (the one containing the
17 directory /) cannot be compiled as a 17 directory /) cannot be compiled as a module.
18 <<
19 This filesystem is limited in capabi <<
20 purpose to remain small and low on R <<
21 for small embedded systems. If you h <<
22 consider a more capable compressed f <<
23 which is much better in terms of per <<
24 <<
25 If unsure, say N. <<
26 <<
27 config CRAMFS_BLOCKDEV <<
28 bool "Support CramFs image over a regu <<
29 depends on CRAMFS && BLOCK <<
30 default y <<
31 help <<
32 This option allows the CramFs driver <<
33 block device such a disk partition o <<
34 <<
35 config CRAMFS_MTD <<
36 bool "Support CramFs image directly ma <<
37 depends on CRAMFS && CRAMFS <= MTD <<
38 default y if !CRAMFS_BLOCKDEV <<
39 help <<
40 This option allows the CramFs driver <<
41 a linear addressed memory range (usu <<
42 like flash) instead of going through <<
43 This saves some memory since no inte <<
44 necessary. <<
45 <<
46 The location of the CramFs image is <<
47 MTD device capable of direct memory <<
48 the 'physmap' map driver or a result <<
49 For example, this would mount the cr <<
50 the MTD partition named "xip_fs" on <<
51 <<
52 mount -t cramfs mtd:xip_fs /mnt <<
53 18
54 If unsure, say N. 19 If unsure, say N.
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