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Commit 4b676d2d authored by Phillip Lougher's avatar Phillip Lougher
Browse files

Squashfs: update Kconfig and documentation for LZO 



Update compression types supported and add some help text for
the LZO Kconfig option.

Also add missing "default n" line and make some trivial whitespace
cleanups too.

Signed-off-by: default avatarPhillip Lougher <phillip@lougher.demon.co.uk>
parent f3065f60

Documentation/filesystems/squashfs.txt

+1 −1
Original line number Diff line number Diff line
@@ -2,7 +2,7 @@ SQUASHFS 4.0 FILESYSTEM 
=======================



Squashfs is a compressed read-only filesystem for Linux.

It uses zlib compression to compress files, inodes and directories.

It uses zlib/lzo compression to compress files, inodes and directories.

Inodes in the system are very small and all blocks are packed to minimise

data overhead. Block sizes greater than 4K are supported up to a maximum

of 1Mbytes (default block size 128K).

fs/squashfs/Kconfig

+14 −4
Original line number Diff line number Diff line
@@ -5,7 +5,7 @@ config SQUASHFS 
	help

	  Saying Y here includes support for SquashFS 4.0 (a Compressed

	  Read-Only File System).  Squashfs is a highly compressed read-only

	  filesystem for Linux.  It uses zlib compression to compress both

	  filesystem for Linux.  It uses zlib/lzo compression to compress both

	  files, inodes and directories.  Inodes in the system are very small

	  and all blocks are packed to minimise data overhead. Block sizes

	  greater than 4K are supported up to a maximum of 1 Mbytes (default
@@ -40,10 +40,20 @@ config SQUASHFS_XATTR 
config SQUASHFS_LZO

	bool "Include support for LZO compressed file systems"

	depends on SQUASHFS

	default n

	select LZO_DECOMPRESS

	help

	  Saying Y here includes support for reading Squashfs file systems

	  compressed with LZO compresssion.  LZO compression is mainly

	  aimed at embedded systems with slower CPUs where the overheads

	  of zlib are too high.



config SQUASHFS_EMBEDDED

	  LZO is not the standard compression used in Squashfs and so most

	  file systems will be readable without selecting this option.



	  If unsure, say N.



config SQUASHFS_EMBEDDED

	bool "Additional option for memory-constrained systems"

	depends on SQUASHFS

	default n