13 Mar, 2010
2 commits
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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 -
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
14 Jan, 2010
1 commit
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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
12 Jan, 2010
1 commit
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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
05 Jan, 2009
1 commit
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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 projectThis 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 compressionSigned-off-by: Alain Knaff
Signed-off-by: H. Peter Anvin
12 Oct, 2007
1 commit
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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
11 Oct, 2007
1 commit
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Signed-off-by: Denys Vlasenko
Acked-by: Michael Chan
Signed-off-by: David S. Miller
08 May, 2007
1 commit
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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
01 Aug, 2006
1 commit
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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
28 Jun, 2006
1 commit
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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
27 Jun, 2006
1 commit
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The place in the documentation of the Linux kernel to acknowledge
contributions is the CREDITS file.Give Mark Adler an entry there instead of including a string in the
kernel image.Signed-off-by: Adrian Bunk
23 Jun, 2006
1 commit
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Upgrade the zlib_inflate implementation in the kernel from a patched
version 1.1.3/4 to a patched 1.2.3.The code in the kernel is about seven years old and I noticed that the
external zlib library's inflate performance was significantly faster (~50%)
than the code in the kernel on ARM (and faster again on x86_32).For comparison the newer deflate code is 20% slower on ARM and 50% slower
on x86_32 but gives an approx 1% compression ratio improvement. I don't
consider this to be an improvement for kernel use so have no plans to
change the zlib_deflate code.Various changes have been made to the zlib code in the kernel, the most
significant being the extra functions/flush option used by ppp_deflate.
This update reimplements the features PPP needs to ensure it continues to
work.This code has been tested on ARM under both JFFS2 (with zlib compression
enabled) and ppp_deflate and on x86_32. JFFS2 sees an approx. 10% real
world file read speed improvement.This patch also removes ZLIB_VERSION as it no longer has a correct value.
We don't need version checks anyway as the kernel's module handling will
take care of that for us. This removal is also more in keeping with the
zlib author's wishes (http://www.zlib.net/zlib_faq.html#faq24) and I've
added something to the zlib.h header to note its a modified version.Signed-off-by: Richard Purdie
Acked-by: Joern Engel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
11 Jan, 2006
1 commit
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This patch contains the following possible cleanups:
- #if 0 the following unused functions:
- zlib_deflate/deflate.c: zlib_deflateSetDictionary
- zlib_deflate/deflate.c: zlib_deflateParams
- zlib_deflate/deflate.c: zlib_deflateCopy
- zlib_inflate/infblock.c: zlib_inflate_set_dictionary
- zlib_inflate/infblock.c: zlib_inflate_blocks_sync_point
- zlib_inflate/inflate_sync.c: zlib_inflateSync
- zlib_inflate/inflate_sync.c: zlib_inflateSyncPoint
- remove the following unneeded EXPORT_SYMBOL's:
- zlib_deflate/deflate_syms.c: zlib_deflateCopy
- zlib_deflate/deflate_syms.c: zlib_deflateParams
- zlib_inflate/inflate_syms.c: zlib_inflateSync
- zlib_inflate/inflate_syms.c: zlib_inflateSyncPointSigned-off-by: Adrian Bunk
Cc: Matt Mackall
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Oct, 2005
1 commit
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There is no need to include module.h in inflate.c
Signed-off-by: Olaf Hering
Cc: Benjamin Herrenschmidt
Cc: Anton Blanchard
Signed-off-by: Andrew Morton
Signed-off-by: Paul Mackerras
18 Aug, 2005
1 commit
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It turns out that empty distance code tables are not an error, and that
a compressed block with only literals can validly have an empty table
and should not be flagged as a data error.Some old versions of gzip had problems with this case, but it does not
affect the zlib code in the kernel.Analysis and explanations thanks to Sergey Vlasov
Signed-off-by: Linus Torvalds
06 Aug, 2005
1 commit
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These bugs have been fixed in the standard zlib for a while.
See for example
a) http://sources.redhat.com/ml/bug-gnu-utils/1999-06/msg00183.html
b) http://bugs.gentoo.org/show_bug.cgi?id=94584Signed-off-by: Tim Yamin
Signed-off-by: Tavis Ormandy
Signed-off-by: Linus Torvalds
17 Apr, 2005
1 commit
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Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.Let it rip!
