linux-kernel - Re: [patch] power, xen64: fix PM_SLEEP build dependencies (was: Re: [PATCH 00 of 55] xen64: implement 64-bit Xen support)

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Date:	Wed, 9 Jul 2008 21:47:53 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	LKML <linux-kernel@...r.kernel.org>, x86@...nel.org,
	Stephen Tweedie <sct@...hat.com>,
	Eduardo Habkost <ehabkost@...hat.com>,
	Mark McLoughlin <markmc@...hat.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [patch] power, xen64: fix PM_SLEEP build dependencies (was:
	Re: [PATCH 00 of 55] xen64: implement 64-bit Xen support)


-tip testing found another PM/PM_SLEEP victim:

 arch/x86/kernel/built-in.o: In function `suspend':
 apm_32.c:(.text+0xedb5): undefined reference to `save_processor_state'
 apm_32.c:(.text+0xedd0): undefined reference to `restore_processor_state'

with this config:
 
 http://redhat.com/~mingo/misc/config-Wed_Jul__9_18_53_45_CEST_2008.bad

havent figured out yet what it's about, but the core scenario seems to 
be this combination (and only this combination) of config values:

  # CONFIG_PM is not set
  CONFIG_PM_SLEEP=y
  CONFIG_APM=y
  CONFIG_PARAVIRT=y
  CONFIG_XEN=y

( accordingly, this build failure only hit two testsystems - the others
  were able to do 250 successful builds without ever hitting this. It
  needs to be fixed nevertheless, to keep the tests going. )

	Ingo
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