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authorTejun Heo <tj@kernel.org>2011-02-16 17:11:09 +0100
committerTejun Heo <tj@kernel.org>2011-02-16 17:11:09 +0100
commita844ef46fa3055165c28feede6114a711b8375ad (patch)
treefcbe0deaa1d743bef8ebeed4d37b7089a561d91b /arch/x86/mm/numa_64.c
parent56e827fbde9a3cb886a2fe138db0d99e98efbfb1 (diff)
downloadop-kernel-dev-a844ef46fa3055165c28feede6114a711b8375ad.zip
op-kernel-dev-a844ef46fa3055165c28feede6114a711b8375ad.tar.gz
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>
Diffstat (limited to 'arch/x86/mm/numa_64.c')
-rw-r--r--arch/x86/mm/numa_64.c19
1 files changed, 19 insertions, 0 deletions
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 @@ void __init numa_emu_cmdline(char *str)
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;
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