1 files changed, 4 insertions, 5 deletions

diff --git a/kernel/padata.c b/kernel/padata.c
index 07af2c95dcfe..2abd25d79cc8 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -46,6 +46,7 @@ static int padata_index_to_cpu(struct parallel_data *pd, int cpu_index)
 
 static int padata_cpu_hash(struct parallel_data *pd)
 {
+        unsigned int seq_nr;
         int cpu_index;
 
         /*
@@ -53,10 +54,8 @@ static int padata_cpu_hash(struct parallel_data *pd)
          * seq_nr mod. number of cpus in use.
          */
 
-        spin_lock(&pd->seq_lock);
-        cpu_index =  pd->seq_nr % cpumask_weight(pd->cpumask.pcpu);
-        pd->seq_nr++;
-        spin_unlock(&pd->seq_lock);
+        seq_nr = atomic_inc_return(&pd->seq_nr);
+        cpu_index = seq_nr % cpumask_weight(pd->cpumask.pcpu);
 
         return padata_index_to_cpu(pd, cpu_index);
 }
@@ -429,7 +428,7 @@ static struct parallel_data *padata_alloc_pd(struct padata_instance *pinst,
         padata_init_pqueues(pd);
         padata_init_squeues(pd);
         setup_timer(&pd->timer, padata_reorder_timer, (unsigned long)pd);
-        pd->seq_nr = 0;
+        atomic_set(&pd->seq_nr, -1);
         atomic_set(&pd->reorder_objects, 0);
         atomic_set(&pd->refcnt, 0);
         pd->pinst = pinst;