linux/usr
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
..
.gitignore gitignore usr/initramfs_data.cpio.bz2 and usr/initramfs_data.cpio.lzma 2009-09-20 12:27:42 +02:00
Kconfig decompressors: add boot-time XZ support 2011-01-13 08:03:25 -08:00
Makefile decompressors: add boot-time XZ support 2011-01-13 08:03:25 -08:00
gen_init_cpio.c gen_init_cpio: checkpatch fixes 2011-01-05 23:49:53 +01:00
initramfs_data.S initramfs: Really fix build break on symbol-prefixed archs 2010-12-01 13:13:21 +01:00