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 21:52:18 +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)


* Ingo Molnar <mingo@...e.hu> wrote:

> -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'

ah, found it - the arch-level power/ directory had a CONFIG_PM-only 
build dependency as well. Fixed via the commit below.

	Ingo

------------->
commit 6666fa5ebb7c78afcab540bf183c7f070c890930
Author: Ingo Molnar <mingo@...e.hu>
Date:   Wed Jul 9 21:45:54 2008 +0200

    power, xen64: fix PM_SLEEP build dependencies, #2
    
    -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
    
    the core scenario is 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
    
    the problem is that the .o file where these symbols live does get built
    on PM_SLEEP=y, but the directory itself was only dependent on CONFIG_PM.
    
    Fix it by adding another rule that also covers the CONFIG_PM_SLEEP case.
    
    Signed-off-by: Ingo Molnar <mingo@...e.hu>

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index fc698f2..4c85d09 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -175,6 +175,7 @@ drivers-$(CONFIG_OPROFILE) += arch/x86/oprofile/
 
 # suspend and hibernation support
 drivers-$(CONFIG_PM) += arch/x86/power/
+drivers-$(CONFIG_PM_SLEEP) += arch/x86/power/
 
 ifeq ($(CONFIG_X86_32),y)
 drivers-$(CONFIG_FB) += arch/x86/video/
--
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