X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fia64%2Fmm%2Fnuma.c;h=4e5c8b36ad93ea91fa72674c3fe0fec44c593871;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=77118bbf3d8b0096a5d30430652c5decdf73093f;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git

diff --git a/arch/ia64/mm/numa.c b/arch/ia64/mm/numa.c
index 77118bbf3..4e5c8b36a 100644
--- a/arch/ia64/mm/numa.c
+++ b/arch/ia64/mm/numa.c
@@ -47,3 +47,27 @@ paddr_to_nid(unsigned long paddr)
 
 	return (i < num_node_memblks) ? node_memblk[i].nid : (num_node_memblks ? -1 : 0);
 }
+
+#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_NUMA)
+/*
+ * Because of holes evaluate on section limits.
+ * If the section of memory exists, then return the node where the section
+ * resides.  Otherwise return node 0 as the default.  This is used by
+ * SPARSEMEM to allocate the SPARSEMEM sectionmap on the NUMA node where
+ * the section resides.
+ */
+int early_pfn_to_nid(unsigned long pfn)
+{
+	int i, section = pfn >> PFN_SECTION_SHIFT, ssec, esec;
+
+	for (i = 0; i < num_node_memblks; i++) {
+		ssec = node_memblk[i].start_paddr >> PA_SECTION_SHIFT;
+		esec = (node_memblk[i].start_paddr + node_memblk[i].size +
+			((1L << PA_SECTION_SHIFT) - 1)) >> PA_SECTION_SHIFT;
+		if (section >= ssec && section < esec)
+			return node_memblk[i].nid;
+	}
+
+	return 0;
+}
+#endif