s390/topology: reduce per_cpu() invocations

Each per_cpu() invocation generates extra code. Since there are a lot
of similiar calls in the topology code we can avoid a lot of them.

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 bf05e7f..40b8102 100644 (file)
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -84,6 +84,7 @@ static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
                                          struct mask_info *socket,
                                          int one_socket_per_cpu)
 {
+       struct cpu_topology_s390 *topo;
        unsigned int core;
 
        for_each_set_bit(core, &tl_core->mask[0], TOPOLOGY_CORE_BITS) {
@@ -95,15 +96,16 @@ static struct mask_info *add_cpus_to_mask(struct topology_core *tl_core,
                if (lcpu < 0)
                        continue;
                for (i = 0; i <= smp_cpu_mtid; i++) {
-                       per_cpu(cpu_topology, lcpu + i).book_id = book->id;
-                       per_cpu(cpu_topology, lcpu + i).core_id = rcore;
-                       per_cpu(cpu_topology, lcpu + i).thread_id = lcpu + i;
+                       topo = &per_cpu(cpu_topology, lcpu + i);
+                       topo->book_id = book->id;
+                       topo->core_id = rcore;
+                       topo->thread_id = lcpu + i;
                        cpumask_set_cpu(lcpu + i, &book->mask);
                        cpumask_set_cpu(lcpu + i, &socket->mask);
                        if (one_socket_per_cpu)
-                               per_cpu(cpu_topology, lcpu + i).socket_id = rcore;
+                               topo->socket_id = rcore;
                        else
-                               per_cpu(cpu_topology, lcpu + i).socket_id = socket->id;
+                               topo->socket_id = socket->id;
                        smp_cpu_set_polarization(lcpu + i, tl_core->pp);
                }
                if (one_socket_per_cpu)
@@ -247,17 +249,19 @@ int topology_set_cpu_management(int fc)
 
 static void update_cpu_masks(void)
 {
+       struct cpu_topology_s390 *topo;
        int cpu;
 
        for_each_possible_cpu(cpu) {
-               per_cpu(cpu_topology, cpu).thread_mask = cpu_thread_map(cpu);
-               per_cpu(cpu_topology, cpu).core_mask = cpu_group_map(&socket_info, cpu);
-               per_cpu(cpu_topology, cpu).book_mask = cpu_group_map(&book_info, cpu);
+               topo = &per_cpu(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);
                if (!MACHINE_HAS_TOPOLOGY) {
-                       per_cpu(cpu_topology, cpu).thread_id = cpu;
-                       per_cpu(cpu_topology, cpu).core_id = cpu;
-                       per_cpu(cpu_topology, cpu).socket_id = cpu;
-                       per_cpu(cpu_topology, cpu).book_id = cpu;
+                       topo->thread_id = cpu;
+                       topo->core_id = cpu;
+                       topo->socket_id = cpu;
+                       topo->book_id = cpu;
                }
        }
        numa_update_cpu_topology();