diff options
Diffstat (limited to 'kernel/padata.c')
| -rw-r--r-- | kernel/padata.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/padata.c b/kernel/padata.c index 07af2c95dcf..161402f0b51 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); } @@ -113,7 +112,7 @@ int padata_do_parallel(struct padata_instance *pinst, rcu_read_lock_bh(); - pd = rcu_dereference(pinst->pd); + pd = rcu_dereference_bh(pinst->pd); err = -EINVAL; if (!(pinst->flags & PADATA_INIT) || pinst->flags & PADATA_INVALID) @@ -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; |