From 93356e63258fe6fe9417d080f723df7c4c84f53f Mon Sep 17 00:00:00 2001
From: Phillip Lougher <phillip@squashfs.org.uk>
Date: Fri, 22 Jul 2011 03:01:28 +0100
Subject: [PATCH] --- yaml --- r: 259063 b: refs/heads/master c:
 cc6d3497141adedb71de8ddce62bf4cd4817832d h: refs/heads/master i:   259061:
 616ce5f74af109a1fa9d2ce1461e46e6c2c30881   259059:
 5737c983681bd7aadbf8c6c2f092770c6c73326a   259055:
 fb7b98d17be51dd38d49e34f35c3e8afb4869b19 v: v3

---
 [refs]                           |  2 +-
 trunk/fs/squashfs/Kconfig        | 14 +++++++++++++-
 trunk/fs/squashfs/Makefile       |  3 ++-
 trunk/fs/squashfs/decompressor.c |  6 ++++++
 trunk/fs/squashfs/decompressor.h |  4 ++++
 trunk/fs/squashfs/squashfs.h     |  3 ---
 6 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/[refs] b/[refs]
index 6a87e76f8968..63b47933e736 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 812753d66f5a45e59a9e0904c77a661c2410a3b4
+refs/heads/master: cc6d3497141adedb71de8ddce62bf4cd4817832d
diff --git a/trunk/fs/squashfs/Kconfig b/trunk/fs/squashfs/Kconfig
index 7797218d0b30..1360d4f88f41 100644
--- a/trunk/fs/squashfs/Kconfig
+++ b/trunk/fs/squashfs/Kconfig
@@ -1,7 +1,6 @@
 config SQUASHFS
 	tristate "SquashFS 4.0 - Squashed file system support"
 	depends on BLOCK
-	select ZLIB_INFLATE
 	help
 	  Saying Y here includes support for SquashFS 4.0 (a Compressed
 	  Read-Only File System).  Squashfs is a highly compressed read-only
@@ -36,6 +35,19 @@ config SQUASHFS_XATTR
 
 	  If unsure, say N.
 
+config SQUASHFS_ZLIB
+	bool "Include support for ZLIB compressed file systems"
+	depends on SQUASHFS
+	select ZLIB_INFLATE
+	default y
+	help
+	  ZLIB compression is the standard compression used by Squashfs
+	  file systems.  It offers a good trade-off between compression
+	  achieved and the amount of CPU time and memory necessary to
+	  compress and decompress.
+
+	  If unsure, say Y.
+
 config SQUASHFS_LZO
 	bool "Include support for LZO compressed file systems"
 	depends on SQUASHFS
diff --git a/trunk/fs/squashfs/Makefile b/trunk/fs/squashfs/Makefile
index cecf2bea07af..110b0476f3b4 100644
--- a/trunk/fs/squashfs/Makefile
+++ b/trunk/fs/squashfs/Makefile
@@ -4,7 +4,8 @@
 
 obj-$(CONFIG_SQUASHFS) += squashfs.o
 squashfs-y += block.o cache.o dir.o export.o file.o fragment.o id.o inode.o
-squashfs-y += namei.o super.o symlink.o zlib_wrapper.o decompressor.o
+squashfs-y += namei.o super.o symlink.o decompressor.o
 squashfs-$(CONFIG_SQUASHFS_XATTR) += xattr.o xattr_id.o
 squashfs-$(CONFIG_SQUASHFS_LZO) += lzo_wrapper.o
 squashfs-$(CONFIG_SQUASHFS_XZ) += xz_wrapper.o
+squashfs-$(CONFIG_SQUASHFS_ZLIB) += zlib_wrapper.o
diff --git a/trunk/fs/squashfs/decompressor.c b/trunk/fs/squashfs/decompressor.c
index 9f1b0bb96f13..3f6271d86abc 100644
--- a/trunk/fs/squashfs/decompressor.c
+++ b/trunk/fs/squashfs/decompressor.c
@@ -52,6 +52,12 @@ static const struct squashfs_decompressor squashfs_xz_comp_ops = {
 };
 #endif
 
+#ifndef CONFIG_SQUASHFS_ZLIB
+static const struct squashfs_decompressor squashfs_zlib_comp_ops = {
+	NULL, NULL, NULL, ZLIB_COMPRESSION, "zlib", 0
+};
+#endif
+
 static const struct squashfs_decompressor squashfs_unknown_comp_ops = {
 	NULL, NULL, NULL, 0, "unknown", 0
 };
diff --git a/trunk/fs/squashfs/decompressor.h b/trunk/fs/squashfs/decompressor.h
index 8ba70cff09a6..330073e29029 100644
--- a/trunk/fs/squashfs/decompressor.h
+++ b/trunk/fs/squashfs/decompressor.h
@@ -56,4 +56,8 @@ extern const struct squashfs_decompressor squashfs_xz_comp_ops;
 extern const struct squashfs_decompressor squashfs_lzo_comp_ops;
 #endif
 
+#ifdef CONFIG_SQUASHFS_ZLIB
+extern const struct squashfs_decompressor squashfs_zlib_comp_ops;
+#endif
+
 #endif
diff --git a/trunk/fs/squashfs/squashfs.h b/trunk/fs/squashfs/squashfs.h
index e3be6a71cfa7..d1266516ed08 100644
--- a/trunk/fs/squashfs/squashfs.h
+++ b/trunk/fs/squashfs/squashfs.h
@@ -97,6 +97,3 @@ extern const struct inode_operations squashfs_symlink_inode_ops;
 
 /* xattr.c */
 extern const struct xattr_handler *squashfs_xattr_handlers[];
-
-/* zlib_wrapper.c */
-extern const struct squashfs_decompressor squashfs_zlib_comp_ops;