x86-64, NUMA: Add common find_node_by_addr()
srat_64.c and amdtopology_64.c had their own versions of
find_node_by_addr() which were basically the same. Add common one in
numa_64.c and remove the duplicates.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
index 20aa1d3..681bc0d 100644
--- a/arch/x86/mm/numa_64.c
+++ b/arch/x86/mm/numa_64.c
@@ -430,6 +430,25 @@
cmdline = str;
}
+int __init find_node_by_addr(unsigned long addr)
+{
+ int ret = NUMA_NO_NODE;
+ int i;
+
+ for_each_node_mask(i, mem_nodes_parsed) {
+ /*
+ * Find the real node that this emulated node appears on. For
+ * the sake of simplicity, we only use a real node's starting
+ * address to determine which emulated node it appears on.
+ */
+ if (addr >= numa_nodes[i].start && addr < numa_nodes[i].end) {
+ ret = i;
+ break;
+ }
+ }
+ return ret;
+}
+
static int __init setup_physnodes(unsigned long start, unsigned long end)
{
int ret = 0;