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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-12-25 13:37:57 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-12-25 13:38:07 +0100
commit5439050f9f1aa92381ab9beccbea6ddf0c687c2b (patch)
treeff60baccf42c58a4268463ad841f806e4048ae26 /arch/s390/kernel/topology.c
parent4a6908a3a050aacc9c3a2f36b276b46c0629ad91 (diff)
downloadop-kernel-dev-5439050f9f1aa92381ab9beccbea6ddf0c687c2b.zip
op-kernel-dev-5439050f9f1aa92381ab9beccbea6ddf0c687c2b.tar.gz
[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>
Diffstat (limited to 'arch/s390/kernel/topology.c')
-rw-r--r--arch/s390/kernel/topology.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index a947899..586c5e3 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);
}
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