linux-{,kirkwood-}2.6.31: Add upstream squashfs-4.0 LZMA patches.

Squashfs 4.0 has official LZMA in the works.

"Re: [Squashfs-devel] squashfs 4.0 lzma support"

According to the author "No, I don't anticipate the format
changing.  As far as LZMA is concerned, the format is dictated
by the LZMA code in the kernel".

An updated squashfs-tools with LZMA support will be committed
to OpenEmbedded in a seperate commit.

Signed-off-by: Leon Woestenberg <leon@sidebranch.com>

1 files changed, 186 insertions, 0 deletions

diff --git a/recipes/linux/linux-2.6.31/0007-Squashfs-Make-unlzma-available-to-non-initramfs-ini.patch b/recipes/linux/linux-2.6.31/0007-Squashfs-Make-unlzma-available-to-non-initramfs-ini.patch
new file mode 100644
index 0000000000..2d6fc3af7e
--- /dev/null
+++ b/recipes/linux/linux-2.6.31/0007-Squashfs-Make-unlzma-available-to-non-initramfs-ini.patch
@@ -0,0 +1,186 @@
+From fdf23ed283bc6ef5c25076ce2065f892120ff556 Mon Sep 17 00:00:00 2001
+From: Phillip Lougher <phillip@lougher.demon.co.uk>
+Date: Thu, 22 Oct 2009 04:57:38 +0100
+Subject: [PATCH] Squashfs: Make unlzma available to non initramfs/initrd code
+
+Add a config option DECOMPRESS_LZMA_NEEDED which allows subsystems to
+specify they need the unlzma code.  Normally decompress_unlzma.c is
+compiled with __init and unlzma is not exported to modules.
+
+Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
+---
+ fs/squashfs/Kconfig                   |    1 +
+ include/linux/decompress/bunzip2_mm.h |   12 ++++++++++++
+ include/linux/decompress/inflate_mm.h |   12 ++++++++++++
+ include/linux/decompress/mm.h         |    3 ---
+ include/linux/decompress/unlzma_mm.h  |   20 ++++++++++++++++++++
+ lib/Kconfig                           |    3 +++
+ lib/decompress_bunzip2.c              |    1 +
+ lib/decompress_inflate.c              |    1 +
+ lib/decompress_unlzma.c               |    5 ++++-
+ 9 files changed, 54 insertions(+), 4 deletions(-)
+
+diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
+index 0294aa2..7ec5d7e 100644
+--- a/fs/squashfs/Kconfig
++++ b/fs/squashfs/Kconfig
+@@ -30,6 +30,7 @@ config SQUASHFS_LZMA
+ 	bool "Include support for LZMA compressed file systems"
+ 	depends on SQUASHFS
+ 	select DECOMPRESS_LZMA
++	select DECOMPRESS_LZMA_NEEDED
+ 
+ config SQUASHFS_EMBEDDED
+ 
+diff --git a/include/linux/decompress/bunzip2_mm.h b/include/linux/decompress/bunzip2_mm.h
+new file mode 100644
+index 0000000..cac6fef
+--- /dev/null
++++ b/include/linux/decompress/bunzip2_mm.h
+@@ -0,0 +1,12 @@
++#ifndef BUNZIP2_MM_H
++#define BUNZIP2_MM_H
++
++#ifdef STATIC
++/* Code active when included from pre-boot environment: */
++#define INIT
++#else
++/* Compile for initramfs/initrd code only */
++#define INIT __init
++#endif
++
++#endif
+diff --git a/include/linux/decompress/inflate_mm.h b/include/linux/decompress/inflate_mm.h
+new file mode 100644
+index 0000000..ca4a2ae
+--- /dev/null
++++ b/include/linux/decompress/inflate_mm.h
+@@ -0,0 +1,12 @@
++#ifndef INFLATE_MM_H
++#define INFLATE_MM_H
++
++#ifdef STATIC
++/* Code active when included from pre-boot environment: */
++#define INIT
++#else
++/* Compile for initramfs/initrd code only */
++#define INIT __init
++#endif
++
++#endif
+diff --git a/include/linux/decompress/mm.h b/include/linux/decompress/mm.h
+index 12ff8c3..80f5ba4 100644
+--- a/include/linux/decompress/mm.h
++++ b/include/linux/decompress/mm.h
+@@ -53,8 +53,6 @@ static void free(void *where)
+ 
+ #define set_error_fn(x)
+ 
+-#define INIT
+-
+ #else /* STATIC */
+ 
+ /* Code active when compiled standalone for use when loading ramdisk: */
+@@ -77,7 +75,6 @@ static void free(void *where)
+ static void(*error)(char *m);
+ #define set_error_fn(x) error = x;
+ 
+-#define INIT __init
+ #define STATIC
+ 
+ #include <linux/init.h>
+diff --git a/include/linux/decompress/unlzma_mm.h b/include/linux/decompress/unlzma_mm.h
+new file mode 100644
+index 0000000..859287e
+--- /dev/null
++++ b/include/linux/decompress/unlzma_mm.h
+@@ -0,0 +1,20 @@
++#ifndef UNLZMA_MM_H
++#define UNLZMA_MM_H
++
++#ifdef STATIC
++
++/* Code active when included from pre-boot environment: */
++#define INIT
++
++#elif defined(CONFIG_DECOMPRESS_LZMA_NEEDED)
++
++/* Make it available to non initramfs/initrd code */
++#define INIT
++#include <linux/module.h>
++#else
++
++/* Compile for initramfs/initrd code only */
++#define INIT __init
++#endif
++
++#endif
+diff --git a/lib/Kconfig b/lib/Kconfig
+index bb1326d..25e7f28 100644
+--- a/lib/Kconfig
++++ b/lib/Kconfig
+@@ -117,6 +117,9 @@ config DECOMPRESS_BZIP2
+ config DECOMPRESS_LZMA
+ 	tristate
+ 
++config DECOMPRESS_LZMA_NEEDED
++	 boolean
++
+ #
+ # Generic allocator support is selected if needed
+ #
+diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
+index 600f473..6eb6433 100644
+--- a/lib/decompress_bunzip2.c
++++ b/lib/decompress_bunzip2.c
+@@ -52,6 +52,7 @@
+ #include <linux/slab.h>
+ #endif /* STATIC */
+ 
++#include <linux/decompress/bunzip2_mm.h>
+ #include <linux/decompress/mm.h>
+ 
+ #ifndef INT_MAX
+diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
+index fc686c7..cb6bcab 100644
+--- a/lib/decompress_inflate.c
++++ b/lib/decompress_inflate.c
+@@ -23,6 +23,7 @@
+ 
+ #endif /* STATIC */
+ 
++#include <linux/decompress/inflate_mm.h>
+ #include <linux/decompress/mm.h>
+ 
+ #define GZIP_IOBUF_SIZE (16*1024)
+diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
+index ca82fde..b2fd927 100644
+--- a/lib/decompress_unlzma.c
++++ b/lib/decompress_unlzma.c
+@@ -36,6 +36,7 @@
+ #include <linux/slab.h>
+ #endif /* STATIC */
+ 
++#include <linux/decompress/unlzma_mm.h>
+ #include <linux/decompress/mm.h>
+ 
+ #define	MIN(a, b) (((a) < (b)) ? (a) : (b))
+@@ -531,7 +532,7 @@ static inline void INIT process_bit1(struct writer *wr, struct rc *rc,
+ 
+ 
+ 
+-STATIC inline int INIT unlzma(unsigned char *buf, int in_len,
++STATIC int INIT unlzma(unsigned char *buf, int in_len,
+ 			      int(*fill)(void*, unsigned int),
+ 			      int(*flush)(void*, unsigned int),
+ 			      unsigned char *output,
+@@ -664,4 +665,6 @@ STATIC int INIT decompress(unsigned char *buf, int in_len,
+ {
+ 	return unlzma(buf, in_len - 4, fill, flush, output, posp, error_fn);
+ }
++#elif defined(CONFIG_DECOMPRESS_LZMA_NEEDED)
++EXPORT_SYMBOL(unlzma);
+ #endif
+-- 
+1.5.2.5
+