[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 <y-goto@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@cs.washington.edu>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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 @@
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 @@
#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 @@
{
return -EINVAL;
}
-#endif
+EXPORT_SYMBOL_GPL(remove_memory);
#endif
struct kmem_cache *pgd_cache;