blkcg: drop stuff unused after per-queue policy activation update

* All_q_list is unused.  Drop all_q_{mutex|list}.

* @for_root of blkg_lookup_create() is always %false when called from
  outside blk-cgroup.c proper.  Factor out __blkg_lookup_create() so
  that it doesn't check whether @q is bypassing and use the
  underscored version for the @for_root callsite.

* blkg_destroy_all() is used only from blkcg proper and @destroy_root
  is always %true.  Make it static and drop @destroy_root.

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, 1 insertions, 5 deletions

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 66253a7c8ff4..222063d36355 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -115,7 +115,6 @@ extern int blkcg_activate_policy(struct request_queue *q,
                                  const struct blkio_policy_type *pol);
 extern void blkcg_deactivate_policy(struct request_queue *q,
                                     const struct blkio_policy_type *pol);
-extern void blkg_destroy_all(struct request_queue *q, bool destroy_root);
 
 void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
                        u64 (*prfill)(struct seq_file *, void *, int),
@@ -334,8 +333,6 @@ static inline int blkcg_activate_policy(struct request_queue *q,
                                         const struct blkio_policy_type *pol) { return 0; }
 static inline void blkcg_deactivate_policy(struct request_queue *q,
                                            const struct blkio_policy_type *pol) { }
-static inline void blkg_destroy_all(struct request_queue *q,
-                                    bool destory_root) { }
 
 static inline void *blkg_to_pdata(struct blkio_group *blkg,
                                 struct blkio_policy_type *pol) { return NULL; }
@@ -354,8 +351,7 @@ extern struct blkio_cgroup *bio_blkio_cgroup(struct bio *bio);
 extern struct blkio_group *blkg_lookup(struct blkio_cgroup *blkcg,
                                        struct request_queue *q);
 struct blkio_group *blkg_lookup_create(struct blkio_cgroup *blkcg,
-                                       struct request_queue *q,
-                                       bool for_root);
+                                       struct request_queue *q);
 #else
 struct cgroup;
 static inline struct blkio_cgroup *