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writeback: remove struct bdi_writeback_congested

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We never set any congested bits in the group writeback instances of it.
And for the simpler bdi-wide case a simple scalar field is all that
that is needed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2020-07-01 11:06:21 +02:00
committed by Jens Axboe
parent 492d76b215
commit 8c911f3d4c
6 changed files with 14 additions and 205 deletions
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18
include/linux/backing-dev.h
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@@ -173,7 +173,7 @@ static inline int wb_congested(struct bdi_writeback *wb, int cong_bits)
if (bdi->congested_fn)
return bdi->congested_fn(bdi->congested_data, cong_bits);
return wb->congested->state & cong_bits;
return wb->congested & cong_bits;
}
long congestion_wait(int sync, long timeout);
@@ -224,9 +224,6 @@ static inline int bdi_sched_wait(void *word)
#ifdef CONFIG_CGROUP_WRITEBACK
struct bdi_writeback_congested *
wb_congested_get_create(struct backing_dev_info *bdi, int blkcg_id, gfp_t gfp);
void wb_congested_put(struct bdi_writeback_congested *congested);
struct bdi_writeback *wb_get_lookup(struct backing_dev_info *bdi,
struct cgroup_subsys_state *memcg_css);
struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
@@ -404,19 +401,6 @@ static inline bool inode_cgwb_enabled(struct inode *inode)
return false;
}
static inline struct bdi_writeback_congested *
wb_congested_get_create(struct backing_dev_info *bdi, int blkcg_id, gfp_t gfp)
{
refcount_inc(&bdi->wb_congested->refcnt);
return bdi->wb_congested;
}
static inline void wb_congested_put(struct bdi_writeback_congested *congested)
{
if (refcount_dec_and_test(&congested->refcnt))
kfree(congested);
}
static inline struct bdi_writeback *wb_find_current(struct backing_dev_info *bdi)
{
return &bdi->wb;