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-rw-r--r--kernel/padata.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/kernel/padata.c b/kernel/padata.c
index ff8de1b71e4e..e7d723a3e31d 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -485,6 +485,11 @@ static void padata_flush_queues(struct parallel_data *pd)
485 BUG_ON(atomic_read(&pd->refcnt) != 0); 485 BUG_ON(atomic_read(&pd->refcnt) != 0);
486} 486}
487 487
488static void __padata_start(struct padata_instance *pinst)
489{
490 pinst->flags |= PADATA_INIT;
491}
492
488/* Replace the internal control stucture with a new one. */ 493/* Replace the internal control stucture with a new one. */
489static void padata_replace(struct padata_instance *pinst, 494static void padata_replace(struct padata_instance *pinst,
490 struct parallel_data *pd_new) 495 struct parallel_data *pd_new)
@@ -619,11 +624,20 @@ EXPORT_SYMBOL(padata_remove_cpu);
619 * 624 *
620 * @pinst: padata instance to start 625 * @pinst: padata instance to start
621 */ 626 */
622void padata_start(struct padata_instance *pinst) 627int padata_start(struct padata_instance *pinst)
623{ 628{
629 int err = 0;
630
624 mutex_lock(&pinst->lock); 631 mutex_lock(&pinst->lock);
625 pinst->flags |= PADATA_INIT; 632
633 if (pinst->flags & PADATA_INVALID)
634 err =-EINVAL;
635
636 __padata_start(pinst);
637
626 mutex_unlock(&pinst->lock); 638 mutex_unlock(&pinst->lock);
639
640 return err;
627} 641}
628EXPORT_SYMBOL(padata_start); 642EXPORT_SYMBOL(padata_start);
629 643