Commit af551fb3 authored by Shaohua Li's avatar Shaohua Li Committed by Jens Axboe

blkcg: delete unused APIs

Nobody uses the APIs right now.
Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 05e3db95
...@@ -2032,37 +2032,6 @@ int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css) ...@@ -2032,37 +2032,6 @@ int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css)
} }
EXPORT_SYMBOL_GPL(bio_associate_blkcg); 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_disassociate_task - undo bio_associate_current()
* @bio: target bio * @bio: target bio
......
...@@ -522,13 +522,11 @@ do { \ ...@@ -522,13 +522,11 @@ do { \
#ifdef CONFIG_BLK_CGROUP #ifdef CONFIG_BLK_CGROUP
int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css); int bio_associate_blkcg(struct bio *bio, struct cgroup_subsys_state *blkcg_css);
int bio_associate_current(struct bio *bio);
void bio_disassociate_task(struct bio *bio); void bio_disassociate_task(struct bio *bio);
void bio_clone_blkcg_association(struct bio *dst, struct bio *src); void bio_clone_blkcg_association(struct bio *dst, struct bio *src);
#else /* CONFIG_BLK_CGROUP */ #else /* CONFIG_BLK_CGROUP */
static inline int bio_associate_blkcg(struct bio *bio, static inline int bio_associate_blkcg(struct bio *bio,
struct cgroup_subsys_state *blkcg_css) { return 0; } struct cgroup_subsys_state *blkcg_css) { return 0; }
static inline int bio_associate_current(struct bio *bio) { return -ENOENT; }
static inline void bio_disassociate_task(struct bio *bio) { } static inline void bio_disassociate_task(struct bio *bio) { }
static inline void bio_clone_blkcg_association(struct bio *dst, static inline void bio_clone_blkcg_association(struct bio *dst,
struct bio *src) { } struct bio *src) { }
......
...@@ -235,12 +235,6 @@ static inline struct blkcg *bio_blkcg(struct bio *bio) ...@@ -235,12 +235,6 @@ static inline struct blkcg *bio_blkcg(struct bio *bio)
return task_blkcg(current); return task_blkcg(current);
} }
static inline struct cgroup_subsys_state *
task_get_blkcg_css(struct task_struct *task)
{
return task_get_css(task, io_cgrp_id);
}
/** /**
* blkcg_parent - get the parent of a blkcg * blkcg_parent - get the parent of a blkcg
* @blkcg: blkcg of interest * @blkcg: blkcg of interest
...@@ -735,12 +729,6 @@ struct blkcg_policy { ...@@ -735,12 +729,6 @@ struct blkcg_policy {
#define blkcg_root_css ((struct cgroup_subsys_state *)ERR_PTR(-EINVAL)) #define blkcg_root_css ((struct cgroup_subsys_state *)ERR_PTR(-EINVAL))
static inline struct cgroup_subsys_state *
task_get_blkcg_css(struct task_struct *task)
{
return NULL;
}
#ifdef CONFIG_BLOCK #ifdef CONFIG_BLOCK
static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg, void *key) { return NULL; } static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg, void *key) { return NULL; }
......
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