Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7c7e9425f114a109b07be2c2c1c6c169e34e9bb3
Commit:     7c7e9425f114a109b07be2c2c1c6c169e34e9bb3
Parent:     080dd51d81c8a9373303e9c344bbc75aacf54dce
Author:     Yasunori Goto <[EMAIL PROTECTED]>
AuthorDate: Fri Dec 22 01:11:13 2006 -0800
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Fri Dec 22 08:55:50 2006 -0800

    [PATCH] memory hotplug: fix compile error for i386 with NUMA config
    
    Fix compile error when config memory hotplug with numa on i386.
    
    The cause of compile error was missing of arch_add_memory(),
    remove_memory(), and memory_add_physaddr_to_nid().
    
    Signed-off-by: Yasunori Goto <[EMAIL PROTECTED]>
    Acked-by: David Rientjes <[EMAIL PROTECTED]>
    Acked-by: Randy Dunlap <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
---
 arch/i386/mm/discontig.c |   28 ++++++++++++++++++++++++++++
 arch/i386/mm/init.c      |   10 ++--------
 2 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/arch/i386/mm/discontig.c b/arch/i386/mm/discontig.c
index 103b76e..e0c390d 100644
--- a/arch/i386/mm/discontig.c
+++ b/arch/i386/mm/discontig.c
@@ -405,3 +405,31 @@ void __init set_highmem_pages_init(int bad_ppro)
        totalram_pages += totalhigh_pages;
 #endif
 }
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+int paddr_to_nid(u64 addr)
+{
+       int nid;
+       unsigned long pfn = PFN_DOWN(addr);
+
+       for_each_node(nid)
+               if (node_start_pfn[nid] <= pfn &&
+                   pfn < node_end_pfn[nid])
+                       return nid;
+
+       return -1;
+}
+
+/*
+ * This function is used to ask node id BEFORE memmap and mem_section's
+ * initialization (pfn_to_nid() can't be used yet).
+ * If _PXM is not defined on ACPI's DSDT, node id must be found by this.
+ */
+int memory_add_physaddr_to_nid(u64 addr)
+{
+       int nid = paddr_to_nid(addr);
+       return (nid >= 0) ? nid : 0;
+}
+
+EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid);
+#endif
diff --git a/arch/i386/mm/init.c b/arch/i386/mm/init.c
index 84697df..60a7e57 100644
--- a/arch/i386/mm/init.c
+++ b/arch/i386/mm/init.c
@@ -673,16 +673,10 @@ void __init mem_init(void)
 #endif
 }
 
-/*
- * this is for the non-NUMA, single node SMP system case.
- * Specifically, in the case of x86, we will always add
- * memory to the highmem for now.
- */
 #ifdef CONFIG_MEMORY_HOTPLUG
-#ifndef CONFIG_NEED_MULTIPLE_NODES
 int arch_add_memory(int nid, u64 start, u64 size)
 {
-       struct pglist_data *pgdata = &contig_page_data;
+       struct pglist_data *pgdata = NODE_DATA(nid);
        struct zone *zone = pgdata->node_zones + ZONE_HIGHMEM;
        unsigned long start_pfn = start >> PAGE_SHIFT;
        unsigned long nr_pages = size >> PAGE_SHIFT;
@@ -694,7 +688,7 @@ int remove_memory(u64 start, u64 size)
 {
        return -EINVAL;
 }
-#endif
+EXPORT_SYMBOL_GPL(remove_memory);
 #endif
 
 struct kmem_cache *pgd_cache;
-
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