blkcg: delete unused APIs

Nobody uses the APIs right now.

Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 31 deletions

diff --git a/block/bio.c b/block/bio.c
index b38e962fa83e..8338304ea256 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -2033,37 +2033,6 @@ int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css)
 EXPORT_SYMBOL_GPL(bio_associate_blkcg);
 
 /**
- * bio_associate_current - associate a bio with %current
- * @bio: target bio
- *
- * Associate @bio with %current if it hasn't been associated yet.  Block
- * layer will treat @bio as if it were issued by %current no matter which
- * task actually issues it.
- *
- * This function takes an extra reference of @task's io_context and blkcg
- * which will be put when @bio is released.  The caller must own @bio,
- * ensure %current->io_context exists, and is responsible for synchronizing
- * calls to this function.
- */
-int bio_associate_current(struct bio *bio)
-{
-        struct io_context *ioc;
-
-        if (bio->bi_css)
-                return -EBUSY;
-
-        ioc = current->io_context;
-        if (!ioc)
-                return -ENOENT;
-
-        get_io_context_active(ioc);
-        bio->bi_ioc = ioc;
-        bio->bi_css = task_get_css(current, io_cgrp_id);
-        return 0;
-}
-EXPORT_SYMBOL_GPL(bio_associate_current);
-
-/**
  * bio_disassociate_task - undo bio_associate_current()
  * @bio: target bio
  */