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blk-cgroup: move struct blkcg to block/blk-cgroup.h

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There is no real need to expose the blkcg structure to the whole kernel.
Move it to the private header an expose a helper to let the writeback
code access the cgwb_list member.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20220420042723.1010598-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2022-04-20 06:27:15 +02:00
committed by Jens Axboe
parent 397c9f46ee
commit dec223c92a
5 changed files with 45 additions and 43 deletions
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6
include/linux/backing-dev.h
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@@ -17,8 +17,6 @@
#include <linux/backing-dev-defs.h>
#include <linux/slab.h>
struct blkcg;
static inline struct backing_dev_info *bdi_get(struct backing_dev_info *bdi)
{
kref_get(&bdi->refcnt);
@@ -154,7 +152,7 @@ struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
struct cgroup_subsys_state *memcg_css,
gfp_t gfp);
void wb_memcg_offline(struct mem_cgroup *memcg);
void wb_blkcg_offline(struct blkcg *blkcg);
void wb_blkcg_offline(struct cgroup_subsys_state *css);
/**
* inode_cgwb_enabled - test whether cgroup writeback is enabled on an inode
@@ -378,7 +376,7 @@ static inline void wb_memcg_offline(struct mem_cgroup *memcg)
{
}
static inline void wb_blkcg_offline(struct blkcg *blkcg)
static inline void wb_blkcg_offline(struct cgroup_subsys_state *css)
{
}