linux-kernel - Re: [PATCH 1/3] Remove unused dependency

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Message-ID: <20071222143128.GA24659@uranus.ravnborg.org>
Date:	Sat, 22 Dec 2007 15:31:28 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>, trivial@...nel.org,
	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Richard Henderson <rth@...ddle.net>
Subject: Re: [PATCH 1/3] Remove unused dependency

On Sat, Dec 22, 2007 at 12:50:12AM -0800, Joe Perches wrote:
> On Sat, 2007-12-22 at 09:33 +0100, Sam Ravnborg wrote:
> > arch/alpha/boot/mixc.c have:
> > #include "../../../lib/inflate.c"
> 
> Right. thanks.  Sorry for the noise.

It was the removal of the file I objected against - not thremoval of the
dependency.
kbuild will find the dpendency as expressed in the Makefile
all by itself.

> 
> Should the makefiles for the sources that include lib/inflate.c
> have a dependency similar to arm and alpha?
> 
> With:
> arch/alpha/boot/misc.c
> arch/arm/boot/compressed/misc.c
> 
> Without:
> arch/cris/arch-v10/boot/compressed/misc.c
> arch/cris/arch-v32/boot/compressed/misc.c
> arch/h8300/boot/compressed/misc.c
> arch/m32r/boot/compressed/misc.c
> arch/sh/boot/compressed/misc.c
> arch/sh64/boot/compressed/misc.c
> arch/x86/boot/compressed/misc_32.c
> arch/x86/boot/compressed/misc_64.c
> init/do_mounts_rd.c
> init/initramfs.c
>
I looked at how inflate was used:

$ grep inflate */boot/Makefile
alpha/boot/Makefile:$(obj)/misc.o: lib/inflate.c
=> redundandt dependency, can be deleted

powerpc/boot/Makefile:zlib       := inffast.c inflate.c inftrees.c
powerpc/boot/Makefile:zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
powerpc/boot/Makefile:$(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
powerpc/boot/Makefile:$(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
=> I could not see why powerpc had to do so much special magic to
get a working zlib - other archs has less troubles...

Did not llok at all archs but some other had funny stuff to use inflate
and friends too. A cleanup of all this is needed.

	Sam
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