linux-kernel - [patch] Re: Linux 3.0-rc3 (APM fix)

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Date:	Tue, 14 Jun 2011 12:45:10 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>, len.brown@...el.com
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andy Whitcroft <apw@...onical.com>,
	Ben Hutchings <ben@...adent.org.uk>
Subject: [patch] Re: Linux 3.0-rc3 (APM fix)

On Mon, 13 Jun 2011 16:01:26 -0700 Linus Torvalds wrote:

> .. and this time even with a timely tar-ball, since I'm not traveling any more.


ERROR: "pm_idle" [arch/x86/kernel/apm.ko] undefined!
ERROR: "default_idle" [arch/x86/kernel/apm.ko] undefined!


Fix was posted by Andy Whitcroft on June 8 and Ben Hutchings on June 9.
https://lkml.org/lkml/2011/6/8/170
https://lkml.org/lkml/2011/6/9/679

Below is Andy's patch since it was posted first.
Please merge some fix.


---
The commit below removed the export for pm_idle/default_idle unless the
apm module was modularised and CONFIG_APM_CPU_IDLE was set.  The apm
module uses pm_idle/default_idle unconditionally, CONFIG_APM_CPU_IDLE
only affects the bios idle threshold.  Adjust the export accordingly.

    commit 06ae40ce073daf233607a3c54a489f2c1e44683e
    Author: Len Brown <len.brown@...el.com>
    Date:   Fri Apr 1 15:28:09 2011 -0400

	x86 idle: EXPORT_SYMBOL(default_idle, pm_idle) only when APM demands it

Signed-off-by: Andy Whitcroft <apw@...onical.com>
---
 arch/x86/kernel/process.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 2e4928d..b8265d0 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -337,7 +337,7 @@ EXPORT_SYMBOL(boot_option_idle_override);
  * Powermanagement idle function, if any..
  */
 void (*pm_idle)(void);
-#if defined(CONFIG_APM_MODULE) && defined(CONFIG_APM_CPU_IDLE)
+#if defined(CONFIG_APM_MODULE)
 EXPORT_SYMBOL(pm_idle);
 #endif
 
@@ -399,7 +399,7 @@ void default_idle(void)
 		cpu_relax();
 	}
 }
-#if defined(CONFIG_APM_MODULE) && defined(CONFIG_APM_CPU_IDLE)
+#if defined(CONFIG_APM_MODULE)
 EXPORT_SYMBOL(default_idle);
 #endif
 
-- 
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