padata: Initialize the padata queues only for the used cpus

padata_alloc_pd set up queues for all possible cpus.
This patch changes this to set up the queues just for
the used cpus.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 5 insertions, 9 deletions

diff --git a/kernel/padata.c b/kernel/padata.c
index 5fa6ba6f11bd..fc9f19a00ae4 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -358,17 +358,15 @@ static struct parallel_data *padata_alloc_pd(struct padata_instance *pinst,
         if (!alloc_cpumask_var(&pd->cpumask, GFP_KERNEL))
                 goto err_free_queue;
 
-        for_each_possible_cpu(cpu) {
+        cpumask_and(pd->cpumask, cpumask, cpu_active_mask);
+
+        for_each_cpu(cpu, pd->cpumask) {
                 queue = per_cpu_ptr(pd->queue, cpu);
 
                 queue->pd = pd;
 
-                if (cpumask_test_cpu(cpu, cpumask)
-                    && cpumask_test_cpu(cpu, cpu_active_mask)) {
-                        queue->cpu_index = cpu_index;
-                        cpu_index++;
-                } else
-                        queue->cpu_index = -1;
+                queue->cpu_index = cpu_index;
+                cpu_index++;
 
                 INIT_LIST_HEAD(&queue->reorder.list);
                 INIT_LIST_HEAD(&queue->parallel.list);
@@ -382,8 +380,6 @@ static struct parallel_data *padata_alloc_pd(struct padata_instance *pinst,
                 atomic_set(&queue->num_obj, 0);
         }
 
-        cpumask_and(pd->cpumask, cpumask, cpu_active_mask);
-
         num_cpus = cpumask_weight(pd->cpumask);
         pd->max_seq_nr = (MAX_SEQ_NR / num_cpus) * num_cpus - 1;