linux-kernel - Re: [PATCH 1/6] lib/decompress_*: only include <linux/slab.h> if STATIC is not defined

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Date:	Tue, 4 Aug 2009 18:08:54 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Phillip Lougher <phillip@...gher.demon.co.uk>
Cc:	Albin Tonnerre <albin.tonnerre@...e-electrons.com>,
	sam@...nborg.org, hpa@...or.com, linux@....linux.org.uk,
	alain@...ff.lu, linux-kernel@...r.kernel.org,
	linux-embedded@...r.kernel.org
Subject: Re: [PATCH 1/6] lib/decompress_*: only include <linux/slab.h> if
 STATIC is not defined

On Wed, 05 Aug 2009 01:47:57 +0100 Phillip Lougher <phillip@...gher.demon.co.uk> wrote:

> Andrew Morton wrote:
> > On Mon,  3 Aug 2009 16:58:16 +0200
> > Albin Tonnerre <albin.tonnerre@...e-electrons.com> wrote:
> > 
> >> These includes were added by 079effb6933f34b9b1b67b08bd4fd7fb672d16ef to
> >> fix the build when using kmemtrace. However this is not necessary when
> >> used to create a compressed kernel, and actually creates issues (brings
> >> a lot of things unavailable in the decompression environment), so don't
> >> include it if STATIC is defined.
> >>
> > 
> > The description "actually creates issues (brings a lot of things
> > unavailable in the decompression environment)" is inadequate.  Please
> > describe te problem this patch fixes more completely so that others
> > (ie: me) can decide whether this patch is needed in 2.6.32, 2.6.31. 
> > 2.6.30, ...
> > 
> > 
> > This patch conflicts heavily with
> > 
> > http://userweb.kernel.org/~akpm/mmotm/broken-out/bzip2-lzma-remove-nasty-uncompressed-size-hack-in-pre-boot-environment.patch
> > 
> > 
> > What should we do about that?
> 
> 
> What do you normally do in this situation?

I normally fix the rejects ;)

But I'd like to confirm that the two patches don't fix the same thing
via different means.  Lacking a full description of Albin's "issues",
that's hard to determine.  They do appear to be unrelated.

>  I'm happy to send a revised
> bzip2-lzma-remove-nasty-uncompressed-size-hack-in-pre-boot-environment.patch
> that would apply cleanly on-top of Alvin's patch, but, this will obviously
> create dependencies on his patch being applied.

Reworked
lib-decompress_-only-include-linux-slabh-if-static-is-not-defined.patch:

 lib/decompress_bunzip2.c |    2 +-
 lib/decompress_inflate.c |    2 +-
 lib/decompress_unlzma.c  |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff -puN lib/decompress_bunzip2.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined lib/decompress_bunzip2.c
--- a/lib/decompress_bunzip2.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined
+++ a/lib/decompress_bunzip2.c
@@ -49,10 +49,10 @@
 #define PREBOOT
 #else
 #include <linux/decompress/bunzip2.h>
+#include <linux/slab.h>
 #endif /* STATIC */
 
 #include <linux/decompress/mm.h>
-#include <linux/slab.h>
 
 #ifndef INT_MAX
 #define INT_MAX 0x7fffffff
diff -puN lib/decompress_inflate.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined lib/decompress_inflate.c
--- a/lib/decompress_inflate.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined
+++ a/lib/decompress_inflate.c
@@ -19,11 +19,11 @@
 #include "zlib_inflate/inflate.h"
 
 #include "zlib_inflate/infutil.h"
+#include <linux/slab.h>
 
 #endif /* STATIC */
 
 #include <linux/decompress/mm.h>
-#include <linux/slab.h>
 
 #define GZIP_IOBUF_SIZE (16*1024)
 
diff -puN lib/decompress_unlzma.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined lib/decompress_unlzma.c
--- a/lib/decompress_unlzma.c~lib-decompress_-only-include-linux-slabh-if-static-is-not-defined
+++ a/lib/decompress_unlzma.c
@@ -33,10 +33,10 @@
 #define PREBOOT
 #else
 #include <linux/decompress/unlzma.h>
+#include <linux/slab.h>
 #endif /* STATIC */
 
 #include <linux/decompress/mm.h>
-#include <linux/slab.h>
 
 #define	MIN(a, b) (((a) < (b)) ? (a) : (b))
 
_

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