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From: Keith Owens <kaos@ocs.com.au>
To: tomas szepe <kala@pinerecords.com>
Cc: kbuild-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org
Subject: Re: kbuild 2.5 release 2.4
In-Reply-To: Your message of "Fri, 03 May 2002 17:45:54 +0200."
             <20020503154554.GB15883@louise.pinerecords.com> 
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Date: Sat, 04 May 2002 01:57:26 +1000
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On Fri, 3 May 2002 17:45:54 +0200, 
tomas szepe <kala@pinerecords.com> wrote:
>$ make -f Makefile-2.5 menuconfig
>[enable RAMDISK support, tweak ramdisk size, enable initrd]
>...
>
>Now, issuing "M installable" will result in nearly all files getting rebuilt.
>The same happens when switching ramdisk off again. How's that?
>
>I tried enabling/disabling many other config options and doing rebuilds but
>couldn't find anything as damaging buildtime-wise as the ramdisk stuff.

CONFIG_BLK_DEV_INITRD is tested in include/linux/fs.h.  Because of the
messy kernel include files, a config change to fs.h affects hundreds of
other files and forces lots of rebuilds.  This is a separate problem
from kbuild, other people are looking at cleaning up the include files.