Squashfs: Add XZ compression configuration option

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>

1 files changed, 15 insertions, 0 deletions

diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
index e5f63da64d04..50cc4edbca06 100644
--- a/fs/squashfs/Kconfig
+++ b/fs/squashfs/Kconfig
@@ -53,6 +53,21 @@ config SQUASHFS_LZO
 
           If unsure, say N.
 
+config SQUASHFS_XZ
+        bool "Include support for XZ compressed file systems"
+        depends on SQUASHFS
+        select XZ_DEC
+        help
+          Saying Y here includes support for reading Squashfs file systems
+          compressed with XZ compresssion.  XZ gives better compression than
+          the default zlib compression, at the expense of greater CPU and
+          memory overhead.
+
+          XZ 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