blk-cgroup: move struct blkg_stat to bfq

This structure and assorted infrastructure is only used by the bfq I/O
scheduler.  Move it there instead of bloating the common code.

Acked-by: Tejun Heo <tj@kernel.org>
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 56 deletions

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 664c09866839..53b7bd4c7000 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -573,20 +573,6 @@ u64 __blkg_prfill_rwstat(struct seq_file *sf, struct blkg_policy_data *pd,
 EXPORT_SYMBOL_GPL(__blkg_prfill_rwstat);
 
 /**
- * blkg_prfill_stat - prfill callback for blkg_stat
- * @sf: seq_file to print to
- * @pd: policy private data of interest
- * @off: offset to the blkg_stat in @pd
- *
- * prfill callback for printing a blkg_stat.
- */
-u64 blkg_prfill_stat(struct seq_file *sf, struct blkg_policy_data *pd, int off)
-{
-        return __blkg_prfill_u64(sf, pd, blkg_stat_read((void *)pd + off));
-}
-EXPORT_SYMBOL_GPL(blkg_prfill_stat);
-
-/**
  * blkg_prfill_rwstat - prfill callback for blkg_rwstat
  * @sf: seq_file to print to
  * @pd: policy private data of interest
@@ -688,48 +674,6 @@ int blkg_print_stat_ios_recursive(struct seq_file *sf, void *v)
 EXPORT_SYMBOL_GPL(blkg_print_stat_ios_recursive);
 
 /**
- * blkg_stat_recursive_sum - collect hierarchical blkg_stat
- * @blkg: blkg of interest
- * @pol: blkcg_policy which contains the blkg_stat
- * @off: offset to the blkg_stat in blkg_policy_data or @blkg
- *
- * Collect the blkg_stat specified by @blkg, @pol and @off and all its
- * online descendants and their aux counts.  The caller must be holding the
- * queue lock for online tests.
- *
- * If @pol is NULL, blkg_stat is at @off bytes into @blkg; otherwise, it is
- * at @off bytes into @blkg's blkg_policy_data of the policy.
- */
-u64 blkg_stat_recursive_sum(struct blkcg_gq *blkg,
-                            struct blkcg_policy *pol, int off)
-{
-        struct blkcg_gq *pos_blkg;
-        struct cgroup_subsys_state *pos_css;
-        u64 sum = 0;
-
-        lockdep_assert_held(&blkg->q->queue_lock);
-
-        rcu_read_lock();
-        blkg_for_each_descendant_pre(pos_blkg, pos_css, blkg) {
-                struct blkg_stat *stat;
-
-                if (!pos_blkg->online)
-                        continue;
-
-                if (pol)
-                        stat = (void *)blkg_to_pd(pos_blkg, pol) + off;
-                else
-                        stat = (void *)blkg + off;
-
-                sum += blkg_stat_read(stat) + atomic64_read(&stat->aux_cnt);
-        }
-        rcu_read_unlock();
-
-        return sum;
-}
-EXPORT_SYMBOL_GPL(blkg_stat_recursive_sum);
-
-/**
  * blkg_rwstat_recursive_sum - collect hierarchical blkg_rwstat
  * @blkg: blkg of interest
  * @pol: blkcg_policy which contains the blkg_rwstat