linux-kernel - Re: [update5] [PATCH] init: bzip2 or lzma -compressed kernels and initrds

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Message-ID: <48D94C72.5020708@zytor.com>
Date:	Tue, 23 Sep 2008 13:07:14 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Alain Knaff <alain@...ff.lu>
CC:	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	w@....eu
Subject: Re: [update5] [PATCH] init: bzip2 or lzma -compressed kernels and
 initrds

Alain Knaff wrote:
> H. Peter Anvin wrote:
>> Just did so, and it broke my first test build.
>>
>> arch/x86/boot/compressed/head_64.o: In function `relocated':
>> (.text+0x28): undefined reference to `_end'
>> make[3]: *** [arch/x86/boot/compressed/vmlinux] Error 1
>> make[2]: *** [arch/x86/boot/compressed/vmlinux] Error 2
>> make[1]: *** [bzImage] Error 2
>> make: *** [sub-make] Error 2
>>
>>     -hpa
> 
> Just leave the changes in head_64.S away; this was only about improved
> memory management. It is not strictly needed, as the change in
> /include/asm-x86/boot.h still makes sure that the heap is big enough,
> even for bzip2
> 

OK, this kind of underscores something I have been thinking already: 
this is a really large patch and should be broken down into a patchset. 
  Presumably something like:

- Cleanups to inflate library code
- Use existing library code for initramfs
- Add bzip2 library code
- Add lzma library code
- Add support for bzip2/lzma initrd
- Add support for bzip2/lzma bzImage

	-hpa
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