The common interface to be used with add_memory().
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: linux-s390@xxxxxxxxxxxxxxx
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
arch/s390/numa/numa.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/s390/numa/numa.c b/arch/s390/numa/numa.c
index 06a80434cfe6..8902652ab3e5 100644
--- a/arch/s390/numa/numa.c
+++ b/arch/s390/numa/numa.c
@@ -44,6 +44,18 @@ int numa_pfn_to_nid(unsigned long pfn)
return mode->__pfn_to_nid ? mode->__pfn_to_nid(pfn) : 0;
}
+#ifdef CONFIG_MEMORY_HOTPLUG
+int memory_add_physaddr_to_nid(u64 addr)
+{
+ int nid = numa_pfn_to_nid(PFN_DOWN(addr));
+
+ if (nid < 0)
+ return 0;
+ return nid;
+}
+EXPORT_SYMBOL(memory_add_physaddr_to_nid);
+#endif
+
void numa_update_cpu_topology(void)
{
if (mode->update_cpu_topology)
--
2.17.0
