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s390/topology: use cpu_topology array instead of per cpu variable

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CPU topology information like cpu to node mapping must be setup in
setup_arch already. Topology information is currently made available
with a per cpu variable; this however will not work when the
initialization will be moved to setup_arch, since the generic percpu
setup will be done much later.

Therefore convert back to a cpu_topology array.

Reviewed-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2016-12-02 10:38:37 +01:00
committed by Martin Schwidefsky
parent af51160ebd
commit 30fc4ca2a8
3 changed files with 22 additions and 23 deletions
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18
arch/s390/kernel/topology.c
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@@ -41,15 +41,15 @@ static bool topology_enabled = true;
static DECLARE_WORK(topology_work, topology_work_fn);
/*
* Socket/Book linked lists and per_cpu(cpu_topology) updates are
* Socket/Book linked lists and cpu_topology updates are
* protected by "sched_domains_mutex".
*/
static struct mask_info socket_info;
static struct mask_info book_info;
static struct mask_info drawer_info;
DEFINE_PER_CPU(struct cpu_topology_s390, cpu_topology);
EXPORT_PER_CPU_SYMBOL_GPL(cpu_topology);
struct cpu_topology_s390 cpu_topology[NR_CPUS];
EXPORT_SYMBOL_GPL(cpu_topology);
static cpumask_t cpu_group_map(struct mask_info *info, unsigned int cpu)
{
@@ -97,7 +97,7 @@ static void add_cpus_to_mask(struct topology_core *tl_core,
if (lcpu < 0)
continue;
for (i = 0; i <= smp_cpu_mtid; i++) {
topo = &per_cpu(cpu_topology, lcpu + i);
topo = &cpu_topology[lcpu + i];
topo->drawer_id = drawer->id;
topo->book_id = book->id;
topo->socket_id = socket->id;
@@ -220,7 +220,7 @@ static void update_cpu_masks(void)
int cpu;
for_each_possible_cpu(cpu) {
topo = &per_cpu(cpu_topology, cpu);
topo = &cpu_topology[cpu];
topo->thread_mask = cpu_thread_map(cpu);
topo->core_mask = cpu_group_map(&socket_info, cpu);
topo->book_mask = cpu_group_map(&book_info, cpu);
@@ -394,23 +394,23 @@ int topology_cpu_init(struct cpu *cpu)
static const struct cpumask *cpu_thread_mask(int cpu)
{
return &per_cpu(cpu_topology, cpu).thread_mask;
return &cpu_topology[cpu].thread_mask;
}
const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &per_cpu(cpu_topology, cpu).core_mask;
return &cpu_topology[cpu].core_mask;
}
static const struct cpumask *cpu_book_mask(int cpu)
{
return &per_cpu(cpu_topology, cpu).book_mask;
return &cpu_topology[cpu].book_mask;
}
static const struct cpumask *cpu_drawer_mask(int cpu)
{
return &per_cpu(cpu_topology, cpu).drawer_mask;
return &cpu_topology[cpu].drawer_mask;
}
static int __init early_parse_topology(char *p)