[S390] cpu topology: fix cpu_core_map initialization

Common code doesn't call arch_update_cpu_topology() anymore on
cpu hotplug. But our architecture backend relied on that in order to
update the cpu_core_map. For machines without cpu topology support
this leads uninitialized cpu_core_maps for later on added cpus.

To solve this just initialize the maps with cpu_possible_map, since
that will be always valid for machines without topology support.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index a947899dcba1..586c5e33b3f4 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -78,7 +78,7 @@ cpumask_t cpu_coregroup_map(unsigned int cpu)
 
         cpus_clear(mask);
         if (!machine_has_topology)
-                return cpu_present_map;
+                return cpu_possible_map;
         spin_lock_irqsave(&topology_lock, flags);
         while (core) {
                 if (cpu_isset(cpu, core->mask)) {
@@ -168,7 +168,7 @@ static void topology_update_polarization_simple(void)
         int cpu;
 
         mutex_lock(&smp_cpu_state_mutex);
-        for_each_present_cpu(cpu)
+        for_each_possible_cpu(cpu)
                 smp_cpu_polarization[cpu] = POLARIZATION_HRZ;
         mutex_unlock(&smp_cpu_state_mutex);
 }
@@ -199,7 +199,7 @@ int topology_set_cpu_management(int fc)
                 rc = ptf(PTF_HORIZONTAL);
         if (rc)
                 return -EBUSY;
-        for_each_present_cpu(cpu)
+        for_each_possible_cpu(cpu)
                 smp_cpu_polarization[cpu] = POLARIZATION_UNKNWN;
         return rc;
 }
@@ -208,7 +208,7 @@ static void update_cpu_core_map(void)
 {
         int cpu;
 
-        for_each_present_cpu(cpu)
+        for_each_possible_cpu(cpu)
                 cpu_core_map[cpu] = cpu_coregroup_map(cpu);
 }