blkcg: use @pol instead of @plid in update_root_blkg_pd() and blkcg_print_blkgs()

The two functions were taking "enum blkio_policy_id plid".  Make them
take "const struct blkio_policy_type *pol" instead.

This is to prepare for per-queue policy activation and doesn't cause
any functional difference.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 4 insertions, 3 deletions

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index c772581c9011..26949731108f 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -117,11 +117,12 @@ extern void blkio_policy_register(struct blkio_policy_type *);
 extern void blkio_policy_unregister(struct blkio_policy_type *);
 extern void blkg_destroy_all(struct request_queue *q, bool destroy_root);
 extern void update_root_blkg_pd(struct request_queue *q,
-                                enum blkio_policy_id plid);
+                                const struct blkio_policy_type *pol);
 
 void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
                        u64 (*prfill)(struct seq_file *, void *, int),
-                       int pol, int data, bool show_total);
+                       const struct blkio_policy_type *pol, int data,
+                       bool show_total);
 u64 __blkg_prfill_u64(struct seq_file *sf, void *pdata, u64 v);
 u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
                          const struct blkg_rwstat *rwstat);
@@ -333,7 +334,7 @@ static inline void blkio_policy_unregister(struct blkio_policy_type *blkiop) { }
 static inline void blkg_destroy_all(struct request_queue *q,
                                     bool destory_root) { }
 static inline void update_root_blkg_pd(struct request_queue *q,
-                                       enum blkio_policy_id plid) { }
+                                       const struct blkio_policy_type *pol) { }
 
 static inline void *blkg_to_pdata(struct blkio_group *blkg,
                                 struct blkio_policy_type *pol) { return NULL; }