[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>

diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index a947899dcba1d55f56f8e00af05ab738293df6a3..586c5e33b3f4d131047a38eb965f0e9551dd4e54 100644 (file)
--- 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);
 }