linux-toradex.git/lib/zlib_inflate, branch v3.0.79

inflate_fast: sout is already a short so ptr arith was off by one.

2010-03-12T23:52:44+00:00

inflate_fast() can do either POST INC or PRE INC on its pointers walking
the memory to decompress.  Default is PRE INC.

The sout pointer offset was miscalculated in one case as the calculation
assumed sout was a char * This breaks inflate_fast() iff configured to do
POST INC.

Signed-off-by: Joakim Tjernlund 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

zlib: make new optimized inflate endian independent

2010-03-12T23:52:44+00:00

Commit 6846ee5ca68d81e6baccf0d56221d7a00c1be18b ("zlib: Fix build of
powerpc boot wrapper") made the new optimized inflate only available on
arch's that define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS.

This patch will again enable the optimization for all arch's by defining
our own endian independent version of unaligned access.  As an added
bonus, arch's that define CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS do a
plain load instead.

Signed-off-by: Joakim Tjernlund 
Cc: Anton Blanchard 
Cc: Benjamin Herrenschmidt 
Cc: David Woodhouse 
Cc: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

zlib: Fix build of powerpc boot wrapper

2010-01-14T00:13:39+00:00

Commit ac4c2a3bbe5db5fc570b1d0ee1e474db7cb22585 broke the build
of all powerpc boot wrappers.

It attempts to add an include of autoconf.h but used the wrong
path for it. It also adds -D__KERNEL__ to our boot wrapper, both
things that we pretty much didn't do on purpose so far.

We want our boot wrapper to remain independent enough of the kernel
for various reasons, one of them being that you can "wrap" an existing
kernel at distro install time which allows to ship one kernel image
and a set of boot wrappers for different platforms, the wrappers
don't have to be built out of the same kernel build tree.

It's also incorrect to do what the patch does in our boot environment
since we may not have a proper alignment exception handler which means
we may not be able to fixup the few cases where an unaligned access will
need SW emulation (depends on the core variant, could be when crossing
page or segment boundaries for example).

This patch fixes it by putting the old code back in and using the
new "fancy" variant only when CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
is set, which happens not to be set on powerpc since we don't include
autoconf.h. It also reverts the changes to our boot wrapper Makefile.

This means that x86 should, afaik, keep the optimisations since its
boot wrapper does include autoconf.h and define __KERNEL__ (though I
doubt they make that much different outside of slow embedded processors).

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Linus Torvalds

zlib: optimize inffast when copying direct from output

2010-01-11T17:34:04+00:00

JFFS2 uses lesser compression ratio and inflate always ends up in "copy
direct from output" case.

This patch tries to optimize the direct copy procedure.  Uses
get_unaligned() but only in one place.

The copy loop just above this one can also use this optimization, but I
havn't done so as I have not tested if it is a win there too.

On my MPC8321 this is about 17% faster on my JFFS2 root FS than the
original.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Joakim Tjernlund 
Cc: Roel Kluin 
Cc: Richard Purdie 
Cc: David Woodhouse 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

bzip2/lzma: library support for gzip, bzip2 and lzma decompression

2009-01-04T23:53:34+00:00

Impact: Replaces inflate.c with a wrapper around zlib_inflate; new library code

This is the first part of the bzip2/lzma patch

The bzip patch is based on an idea by Christian Ludwig, includes support for
compressing the kernel with bzip2 or lzma rather than gzip. Both
compressors give smaller sizes than gzip.  Lzma's decompresses faster
than bzip2.

It also supports ramdisks and initramfs' compressed using these two
compressors.

The functionality has been successfully used for a couple of years by
the udpcast project

This version applies to "tip" kernel 2.6.28

This part contains:
- changed inflate.c to accomodate rest of patch
- implementation of bzip2 compression (not used at this stage yet)
- implementation of lzma compression (not used at this stage yet)
- Makefile routines to support bzip2 and lzma kernel compression

Signed-off-by: Alain Knaff 
Signed-off-by: H. Peter Anvin

[ZLIB]: Fix external builds of zlib_inflate code.

2007-10-12T05:17:20+00:00

Move zlib_inflate_blob() out into it's own source file,
infutil.c, so that things like the powerpc zImage builder
in arch/powerpc/boot/Makefile don't end up trying to
compile it.

Signed-off-by: David S. Miller

[ZLIB]: Move bnx2 driver gzip unpacker into zlib.

2007-10-10T23:53:57+00:00

Signed-off-by: Denys Vlasenko 
Acked-by: Michael Chan 
Signed-off-by: David S. Miller

Fix ppp_deflate issues with recent zlib_inflate changes

2007-05-07T19:13:04+00:00

The last zlib_inflate update broke certain corner cases for ppp_deflate
decompression handling.  This patch fixes some logic to make things work
properly again.  Users other than ppp_deflate (the only Z_PACKET_FLUSH
user) should be unaffected.

Fixes bug 8405 (confirmed by Stefan)

Signed-off-by: Richard Purdie 
Cc: Stefan Wenk 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Fix ppc32 zImage inflate

2006-07-31T20:28:37+00:00

The recent zlib update (commit 4f3865fb57a04db7cca068fed1c15badc064a302)
broke ppc32 zImage decompression as it tries to decompress to address zero
and the updated zlib_inflate checks that strm->next_out isn't a null
pointer.

This little patch fixes it.

[rpurdie@rpsys.net: add comment]
Signed-off-by: Peter Korsgaard 
Acked-by: Tom Rini 
Signed-off-by: Richard Purdie 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] zlib inflate: fix function definitions

2006-06-28T00:32:35+00:00

Fix function definitions to be ANSI-compliant:
lib/zlib_inflate/inffast.c:68:1: warning: non-ANSI definition of function 'inflate_fast'
lib/zlib_inflate/inftrees.c:33:1: warning: non-ANSI definition of function 'zlib_inflate_table'

Signed-off-by: Randy Dunlap 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds