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authorChristoph Hellwig <hch@lst.de>2022-04-20 07:27:09 +0300
committerJens Axboe <axboe@kernel.dk>2022-05-02 23:06:20 +0300
commit2524a5783e7d49e7cd936f582485a2bb4567edd1 (patch)
tree3312b61b595bb74c4a21c94f6676afbe5064d325 /block/blk-cgroup.h
parent9650b453a3d4b1b8ed4ea8bcb9b40109608d1faf (diff)
downloadlinux-2524a5783e7d49e7cd936f582485a2bb4567edd1.tar.xz
blk-cgroup: remove __bio_blkcg
Remove the unused and deprecated __bio_blkcg helper. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20220420042723.1010598-2-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-cgroup.h')
-rw-r--r--block/blk-cgroup.h23
1 files changed, 0 insertions, 23 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 47e1e38390c9..49e88fc9cc39 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -140,27 +140,6 @@ static inline struct cgroup_subsys_state *blkcg_css(void)
}
/**
- * __bio_blkcg - internal, inconsistent version to get blkcg
- *
- * DO NOT USE.
- * This function is inconsistent and consequently is dangerous to use. The
- * first part of the function returns a blkcg where a reference is owned by the
- * bio. This means it does not need to be rcu protected as it cannot go away
- * with the bio owning a reference to it. However, the latter potentially gets
- * it from task_css(). This can race against task migration and the cgroup
- * dying. It is also semantically different as it must be called rcu protected
- * and is susceptible to failure when trying to get a reference to it.
- * Therefore, it is not ok to assume that *_get() will always succeed on the
- * blkcg returned here.
- */
-static inline struct blkcg *__bio_blkcg(struct bio *bio)
-{
- if (bio && bio->bi_blkg)
- return bio->bi_blkg->blkcg;
- return css_to_blkcg(blkcg_css());
-}
-
-/**
* bio_issue_as_root_blkg - see if this bio needs to be issued as root blkg
* @return: true if this bio needs to be submitted with the root blkg context.
*
@@ -471,8 +450,6 @@ static inline int blkcg_activate_policy(struct request_queue *q,
static inline void blkcg_deactivate_policy(struct request_queue *q,
const struct blkcg_policy *pol) { }
-static inline struct blkcg *__bio_blkcg(struct bio *bio) { return NULL; }
-
static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg,
struct blkcg_policy *pol) { return NULL; }
static inline struct blkcg_gq *pd_to_blkg(struct blkg_policy_data *pd) { return NULL; }