linux-kernel - Re: memory hotplug function redefinition/confusion

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Message-Id: <20061117231515.ADBF.Y-GOTO@jp.fujitsu.com>
Date:	Fri, 17 Nov 2006 23:28:44 +0900
From:	Yasunori Goto <y-goto@...fujitsu.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, akpm <akpm@...l.org>,
	kamezawa.hiroyu@...fujitsu.com, kmannth@...ibm.com
Subject: Re: memory hotplug function redefinition/confusion

Hello.

> include/linux/memory_hotplug.h uses CONFIG_NUMA to decide:
(snip)
> but mm/init.c uses CONFIG_ACPI_NUMA to decide:
(snip)
> (sic: duplicate function above)

Indeed. It is strange. This is a patch for it.

Thanks for your report!

Bye.

--------

This is to fix compile error of x86-64 memory hotplug without
any NUMA option.

  CC      arch/x86_64/mm/init.o
arch/x86_64/mm/init.c:501: error: redefinition of 'memory_add_physaddr_to_nid'
include/linux/memory_hotplug.h:71: error: previous definition of 'memory_add_phys
addr_to_nid' was here
arch/x86_64/mm/init.c:509: error: redefinition of 'memory_add_physaddr_to_nid'
arch/x86_64/mm/init.c:501: error: previous definition of 'memory_add_physaddr_to_
nid' was here
make[1]: *** [arch/x86_64/mm/init.o] Error 1

I confirmed compile completion with !NUMA, (NUMA & !ACPI_NUMA),
or (NUMA & ACPI_NUMA).

This patch is for 2.6.19-rc5-mm2.

Signed-off-by: Yasunori Goto <y-goto@...fujitsu.com>

----

 arch/x86_64/mm/init.c |    9 +--------
 1 files changed, 1 insertion(+), 8 deletions(-)

Index: 19-rc5-mm2/arch/x86_64/mm/init.c
===================================================================
--- 19-rc5-mm2.orig/arch/x86_64/mm/init.c	2006-11-17 22:31:30.000000000 +0900
+++ 19-rc5-mm2/arch/x86_64/mm/init.c	2006-11-17 22:31:40.000000000 +0900
@@ -496,7 +496,7 @@ int remove_memory(u64 start, u64 size)
 }
 EXPORT_SYMBOL_GPL(remove_memory);
 
-#ifndef CONFIG_ACPI_NUMA
+#if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA)
 int memory_add_physaddr_to_nid(u64 start)
 {
 	return 0;
@@ -504,13 +504,6 @@ int memory_add_physaddr_to_nid(u64 start
 EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 
-#ifndef CONFIG_ACPI_NUMA
-int memory_add_physaddr_to_nid(u64 start)
-{
-	return 0;
-}
-#endif
-
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 #ifdef CONFIG_MEMORY_HOTPLUG_RESERVE

-- 
Yasunori Goto 


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