linux-kernel - Re: [PATCH 0/3] Update LZO compression

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Date:	Thu, 11 Oct 2012 11:41:27 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	"Markus F.X.J. Oberhumer" <markus@...rhumer.com>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>,
	Johannes Stezenbach <js@...21.net>,
	"richard -rw- weinberger" <richard.weinberger@...il.com>,
	linux-btrfs@...r.kernel.org, linux-crypto@...r.kernel.org,
	Artem Bityutskiy <dedekind1@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Phillip Lougher <phillip@...ashfs.org.uk>,
	Dan Magenheimer <dan.magenheimer@...cle.com>,
	Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH 0/3] Update LZO compression

On Tuesday 09 October 2012, Markus F.X.J. Oberhumer wrote:
> > 
> > : This commit updates the kernel LZO code to the current upsteam version
> > : which features a significant speed improvement - benchmarking the Calgary
> > : and Silesia test corpora typically shows a doubled performance in
> > : both compression and decompression on modern i386/x86_64/powerpc machines.
> > 
> > There are significant clients of the LZO library - crypto, btrfs,
> > jffs2, ubifs, squashfs and zcache.  So let's give all those people a cc
> > and ask that they test the LZO changes once they land in linux-next. 
> > For correctness and performance, please.
> 
> The core compression and decompression code has been thoroughly tested, so I
> do not expect major problems.
> 
> Good testing after the merge and feedback about build or performance issues
> (and improvements!) is highly appreciated.

The addition of the lzo tree to linux-next caused this problem for ARM
imx_v6_v7_defconfig:

In file included from /home/arnd/linux-arm/arch/arm/boot/compressed/decompress.c:40:0:
/home/arnd/linux-arm/arch/arm/boot/compressed/../../../../lib/decompress_unlzo.c:34:34: fatal error: lzo/lzo1x_decompress.c: No such file or directory

Since the file was renamed, anything including it needs to be updated to the
new file name.

Signed-off-by: Arnd Bergmann <arnd@...db.de>

diff --git a/lib/decompress_unlzo.c b/lib/decompress_unlzo.c
index 4531294..960183d 100644
--- a/lib/decompress_unlzo.c
+++ b/lib/decompress_unlzo.c
@@ -31,7 +31,7 @@
  */
 
 #ifdef STATIC
-#include "lzo/lzo1x_decompress.c"
+#include "lzo/lzo1x_decompress_safe.c"
 #else
 #include <linux/decompress/unlzo.h>
 #endif
--
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