[PATCH] powerpc/pseries: Fix build error when NUMA=n

[Michael Ellerman]

As reported by lkp, if NUMA=n we see a build error:

   arch/powerpc/platforms/pseries/hotplug-cpu.c: In function 
'pseries_cpu_hotplug_init':
   arch/powerpc/platforms/pseries/hotplug-cpu.c:1022:8: error: 
'node_to_cpumask_map' undeclared
    1022 |        node_to_cpumask_map[node]);

Use cpumask_of_node() which has an empty stub for NUMA=n, and when
NUMA=y does a lookup from node_to_cpumask_map[].

Fixes: bd1dd4c5f528 ("powerpc/pseries: Prevent free CPU ids being reused on 
another node")
Reported-by: kernel test robot <l...@intel.com>
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
 arch/powerpc/platforms/pseries/hotplug-cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c 
b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 1ef40ef699a6..d646c22e94ab 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -1021,7 +1021,7 @@ static int __init pseries_cpu_hotplug_init(void)
                        /* Record ids of CPU added at boot time */
                        cpumask_or(node_recorded_ids_map[node],
                                   node_recorded_ids_map[node],
-                                  node_to_cpumask_map[node]);
+                                  cpumask_of_node(node));
                }
 
                of_reconfig_notifier_register(&pseries_smp_nb);
-- 
2.25.1