dmaengine: ioatdma: constify dca_ops structures

The dca_ops structure is never modified, so declare it as const.

Done with the help of Coccinelle.

Signed-off-by: Julia Lawall <[e-mail]>
Acked-by: Dan Williams <[e-mail]>
Signed-off-by: Vinod Koul <[e-mail]>

drivers/dca/dca-core.c

···
  * @ops - pointer to struct of dca operation function pointers
  * @priv_size - size of extra mem to be added for provider's needs
  */
-struct dca_provider *alloc_dca_provider(struct dca_ops *ops, int priv_size)
+struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
+					int priv_size)
 {
 	struct dca_provider *dca;
 	int alloc_size;

drivers/dma/ioat/dca.c

···
 	return tag;
 }
 
-static struct dca_ops ioat_dca_ops = {
+static const struct dca_ops ioat_dca_ops = {
 	.add_requester		= ioat_dca_add_requester,
 	.remove_requester	= ioat_dca_remove_requester,
 	.get_tag		= ioat_dca_get_tag,

include/linux/dca.h

···
 
 struct dca_provider {
 	struct list_head	node;
-	struct dca_ops		*ops;
+	const struct dca_ops	*ops;
 	struct device 		*cd;
 	int			 id;
 };
···
 	int	(*dev_managed)      (struct dca_provider *, struct device *);
 };
 
-struct dca_provider *alloc_dca_provider(struct dca_ops *ops, int priv_size);
+struct dca_provider *alloc_dca_provider(const struct dca_ops *ops,
+					int priv_size);
 void free_dca_provider(struct dca_provider *dca);
 int register_dca_provider(struct dca_provider *dca, struct device *dev);
 void unregister_dca_provider(struct dca_provider *dca, struct device *dev);