linux-kernel - Uncompressed kernel doesn't build on x86

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Date:	Wed, 13 Nov 2013 11:34:18 -0500
From:	Pavel Roskin <proski@....org>
To:	Christian Ruppert <christian.ruppert@...lis.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Uncompressed kernel doesn't build on x86_64

Hi Christian,

Your recent patch enables uncompressed kernels, but selecting that
option (CONFIG_KERNEL_UNCOMPRESSED) fails on x86_86:

commit 69f0554ec261fd686ac7fa1c598cc9eb27b83a80
Author: Christian Ruppert <christian.ruppert@...lis.com>
Date:   Tue Nov 12 15:11:43 2013 -0800

    init/Kconfig: add option to disable kernel compression

That's how it fails:

  LD      init/built-in.o
  KSYM    .tmp_kallsyms1.o
  KSYM    .tmp_kallsyms2.o
  LD      vmlinux
  SORTEX  vmlinux
  SYSMAP  System.map
  VOFFSET arch/x86/boot/voffset.h
make[4]: *** No rule to make target
  `arch/x86/boot/compressed/vmlinux.bin.', needed by
  `arch/x86/boot/compressed/piggy.S'.  Stop. make[3]: ***
  [arch/x86/boot/compressed/vmlinux] Error 2 make[2]: *** [bzImage]
  Error 2 make[1]: *** [sub-make] Error 2 make: *** [all] Error 2

arch/x86/boot/compressed/Makefile has no provision for uncompressed
files.  There is no definition for suffix-$(CONFIG_KERNEL_UNCOMPRESSED)
so $(suffix-y) evaluates to an empty string and there is no rule to
make vmlinuz.bin.$(suffix-y)

I think the patch should be either reverted or fixed as soon as
possible.

Any suggestions for uncompressed suffix?  I'd go with "copy".  Then the
"compression" could be a symlink.  Alternatively, the "." could be
included in other suffixes, the uncompressed suffix would be empty and
the compression would be an empty statement.

-- 
Regards,
Pavel Roskin
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