linux-kernel - Re: mmotm 2008-09-22-01-36 uploaded (memory

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Message-Id: <20080922125731.0ee87e05.akpm@linux-foundation.org>
Date:	Mon, 22 Sep 2008 12:57:31 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	linux-kernel@...r.kernel.org,
	Badari Pulavarty <pbadari@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Mundt <lethal@...ux-sh.org>
Subject: Re: mmotm 2008-09-22-01-36 uploaded (memory_hotplug)

On Mon, 22 Sep 2008 11:29:18 -0700
Randy Dunlap <randy.dunlap@...cle.com> wrote:

> On Mon, 22 Sep 2008 01:38:58 -0700 akpm@...ux-foundation.org wrote:
> 
> > The mm-of-the-moment snapshot 2008-09-22-01-36 has been uploaded to
> > 
> >    http://userweb.kernel.org/~akpm/mmotm/
> > 
> > It contains the following patches against 2.6.27-rc7:
> 
> 
> mm/built-in.o: In function `remove_memory':
> (.text+0x497ed): multiple definition of `remove_memory'
> arch/x86/mm/built-in.o:(.text+0x3d8): first defined here
> make[1]: *** [vmlinux.o] Error 1
> 
> 
> so it is defined in both mm/memory_hotplug.c and
> arch/x86/mm/init_64.c when CONFIG_MEMORY_HOTREMOVE=y.
> 

OK, thanks, it looks like people are changing things under our feet.

Badari, can you please check this fix against
mm-cleanup-to-make-remove_memory-arch-neutral.patch?



diff -puN arch/sh/mm/init.c~mm-cleanup-to-make-remove_memory-arch-neutral-fix-fix arch/sh/mm/init.c
--- a/arch/sh/mm/init.c~mm-cleanup-to-make-remove_memory-arch-neutral-fix-fix
+++ a/arch/sh/mm/init.c
@@ -293,20 +293,4 @@ int memory_add_physaddr_to_nid(u64 addr)
 EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 
-#ifdef CONFIG_MEMORY_HOTREMOVE
-int remove_memory(u64 start, u64 size)
-{
-	unsigned long start_pfn = start >> PAGE_SHIFT;
-	unsigned long end_pfn = start_pfn + (size >> PAGE_SHIFT);
-	int ret;
-
-	ret = offline_pages(start_pfn, end_pfn, 120 * HZ);
-	if (unlikely(ret))
-		printk("%s: Failed, offline_pages() == %d\n", __func__, ret);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(remove_memory);
-#endif
-
 #endif /* CONFIG_MEMORY_HOTPLUG */
diff -puN arch/x86/mm/init_64.c~mm-cleanup-to-make-remove_memory-arch-neutral-fix-fix arch/x86/mm/init_64.c
--- a/arch/x86/mm/init_64.c~mm-cleanup-to-make-remove_memory-arch-neutral-fix-fix
+++ a/arch/x86/mm/init_64.c
@@ -796,24 +796,6 @@ int memory_add_physaddr_to_nid(u64 start
 EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
 #endif
 
-#ifdef CONFIG_MEMORY_HOTREMOVE
-int remove_memory(u64 start, u64 size)
-{
-	unsigned long start_pfn, end_pfn;
-	unsigned long timeout = 120 * HZ;
-	int ret;
-	start_pfn = start >> PAGE_SHIFT;
-	end_pfn = start_pfn + (size >> PAGE_SHIFT);
-	ret = offline_pages(start_pfn, end_pfn, timeout);
-	if (ret)
-		goto out;
-	/* Arch-specific calls go here */
-out:
-	return ret;
-}
-EXPORT_SYMBOL_GPL(remove_memory);
-#endif /* CONFIG_MEMORY_HOTREMOVE */
-
 #endif /* CONFIG_MEMORY_HOTPLUG */
 
 /*
_

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