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Lasse Collin 3ebe12439b decompressors: add boot-time XZ support 
This implements the API defined in <linux/decompress/generic.h> which is
used for kernel, initramfs, and initrd decompression.  This patch together
with the first patch is enough for XZ-compressed initramfs and initrd;
XZ-compressed kernel will need arch-specific changes.

The buffering requirements described in decompress_unxz.c are stricter
than with gzip, so the relevant changes should be done to the
arch-specific code when adding support for XZ-compressed kernel.
Similarly, the heap size in arch-specific pre-boot code may need to be
increased (30 KiB is enough).

The XZ decompressor needs memmove(), memeq() (memcmp() == 0), and
memzero() (memset(ptr, 0, size)), which aren't available in all
arch-specific pre-boot environments.  I'm including simple versions in
decompress_unxz.c, but a cleaner solution would naturally be nicer.

Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Alain Knaff <alain@knaff.lu>
Cc: Albin Tonnerre <albin.tonnerre@free-electrons.com>
Cc: Phillip Lougher <phillip@lougher.demon.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-13 08:03:25 -08:00
..
basic Make fixdep error handling more explicit 2010-12-22 23:23:28 +01:00
coccinelle scripts/coccinelle: update for compatability with Coccinelle 0.2.4 2010-12-03 12:27:01 +01:00
dtc of/flattree: Update dtc to current mainline. 2011-01-03 16:02:49 -07:00
genksyms scripts/genksyms: fix header usage 2010-11-25 16:25:06 +01:00
kconfig Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-01-10 08:28:17 -08:00
ksymoops
mod modpost: Fix address calculation in reloc_location() 2010-12-28 00:22:58 +01:00
package Merge branch 'packaging' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-01-10 08:28:38 -08:00
rt-tester scripts: change scripts to use system python instead of env 2010-02-02 14:33:56 +01:00
selinux selinux: fix warning in genheaders 2010-03-16 08:47:36 +11:00
tracing tracing, perf: Convert the power tracer into an event tracer 2009-09-19 11:42:12 +02:00
.gitignore gitignore: add scripts/recordmcount 2010-11-25 15:49:50 +01:00
bin2c.c
bloat-o-meter
bootgraph.pl bootgraph: fix for use with dot symbols 2009-02-15 12:50:08 +01:00
checkincludes.pl checkincludes: fix perlcritic warnings 2010-03-07 21:19:57 +01:00
checkkconfigsymbols.sh checkkconfigsymbols.sh: Kconfig symbols sometimes have lowercase letters 2010-06-03 10:39:39 +02:00
checkpatch.pl checkpatch.pl: add "prefer __packed" check 2011-01-13 08:03:11 -08:00
checkstack.pl scripts: improve checkstack 2010-03-07 21:19:09 +01:00
checksyscalls.sh checksyscalls: Fix stand-alone usage 2010-12-20 15:40:33 +01:00
checkversion.pl checkversion: perl cleanup 2010-03-07 21:22:56 +01:00
cleanfile
cleanpatch
coccicheck Coccinelle: Add contextual message 2010-10-28 00:32:23 +02:00
config kbuild: add numeric --set-val option to scripts/config 2010-12-15 15:44:31 +01:00
conmakehash.c Fix all -Wmissing-prototypes warnings in x86 defconfig 2009-09-23 07:39:28 -07:00
decodecode scripts: decodecode: remove bashisms 2010-06-04 10:26:35 +02:00
diffconfig
export_report.pl export_report: fix perl warnings 2010-03-07 21:41:04 +01:00
extract-ikconfig scripts/extract-ikconfig: add support for bzip2, lzma and lzo 2010-10-28 00:22:17 +02:00
gcc-goto.sh jump label: Fix GCC feature check when distcc is used 2010-09-24 09:12:25 +02:00
gcc-version.sh Remove bashisms from scripts 2009-06-09 22:37:54 +02:00
gcc-x86_32-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gcc-x86_64-has-stack-protector.sh stackprotector: fix multi-word cross-builds 2009-02-11 12:17:29 +01:00
gen_initramfs_list.sh decompressors: add boot-time XZ support 2011-01-13 08:03:25 -08:00
get_maintainer.pl scripts/get_maintainer.pl: use --git-fallback more often 2011-01-13 08:03:10 -08:00
gfp-translate scripts: fix gfp-translate for recent changes to gfp.h 2010-11-25 06:50:49 +09:00
headerdep.pl headerdep: perlcritic warning 2010-03-23 12:26:38 +01:00
headers_check.pl headers_check: Fix warning text 2010-12-14 17:05:08 +01:00
headers_install.pl headers_install: check exit status of unifdef 2010-12-14 15:06:04 +01:00
headers.sh kbuild: introduce HDR_ARCH_LIST for headers_install_all 2010-12-14 22:16:19 +01:00
kallsyms.c scripts/kallsyms: Enable error messages while hush up unnecessary warnings 2010-09-29 16:18:27 +02:00
Kbuild.include kbuild: generate modules.builtin 2009-12-12 13:08:16 +01:00
kernel-doc kernel-doc: code reorganization 2011-01-06 09:59:38 -08:00
Lindent
Makefile ftrace/x86: Add support for C version of recordmcount 2010-10-14 16:52:41 -04:00
Makefile.build ftrace: Speed up recordmcount 2010-11-18 17:16:05 -05:00
Makefile.clean kbuild: Really don't clean bounds.h and asm-offsets.h 2010-03-11 11:15:22 +01:00
Makefile.fwinst
Makefile.headersinst kbuild: drop unifdef-y support 2010-08-14 22:26:52 +02:00
Makefile.help Add a target to use the Coccinelle checker 2010-06-12 00:00:29 +02:00
Makefile.host
Makefile.lib decompressors: add XZ decompressor module 2011-01-13 08:03:24 -08:00
Makefile.modbuiltin kbuild: Create output directory in Makefile.modbuiltin 2010-06-10 12:23:08 +02:00
Makefile.modinst Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
Makefile.modpost trivial: fix a typo in a filename 2010-08-03 14:59:50 +02:00
makelst
markup_oops.pl Merge branch 'for-35' of git://repo.or.cz/linux-kbuild 2010-06-01 08:55:52 -07:00
mkcompile_h scripts/mkcompile_h: don't test for hardcoded paths 2010-02-02 14:33:56 +01:00
mkmakefile fixes for using make 3.82 2010-08-17 11:47:40 +02:00
mksysmap Revert "kbuild: strip generated symbols from *.ko" 2009-01-14 21:38:20 +01:00
mkuboot.sh mkuboot.sh: Fail if mkimage is missing 2011-01-07 14:31:01 +01:00
mkversion
module-common.lds linker script: throw away .discard section 2009-06-24 15:13:38 +09:00
namespace.pl Revert "namespace: add source file location exceptions" 2010-10-28 00:59:56 +02:00
patch-kernel
pnmtologo.c fbdev: work around old compiler bug 2009-06-30 18:55:59 -07:00
profile2linkerlist.pl profile2linkerlist: fix perl warnings 2010-03-07 21:39:33 +01:00
recordmcount.c ARM: 6511/1: ftrace: add ARM support for C version of recordmcount 2010-12-04 11:30:27 +00:00
recordmcount.h Merge branches 'ftrace', 'gic', 'io', 'kexec', 'mod', 'sa11x0', 'sh' and 'versatile' into devel 2011-01-05 18:08:10 +00:00
recordmcount.pl ARM: 6319/1: ftrace: add Thumb-2 support to dynamic ftrace 2010-09-02 15:28:43 +01:00
setlocalversion Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2010-10-28 15:13:55 -07:00
show_delta scripts: change scripts to use system python instead of env 2010-02-02 14:33:56 +01:00
tags.sh Merge branch 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2011-01-10 08:29:25 -08:00
unifdef.c unifdef: update to upstream revision 1.190 2009-12-12 13:08:16 +01:00
ver_linux Remove bashisms from scripts 2009-06-09 22:37:54 +02:00
xz_wrap.sh decompressors: add XZ decompressor module 2011-01-13 08:03:24 -08:00