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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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6
include/linux/blk-cgroup.h
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@ -109,12 +109,6 @@ struct blkcg_gq {
struct hlist_node blkcg_node;
struct blkcg *blkcg;
/*
* Each blkg gets congested separately and the congestion state is
* propagated to the matching bdi_writeback_congested.
*/
struct bdi_writeback_congested *wb_congested;
/* all non-root blkcg_gq's are guaranteed to have access to parent */
struct blkcg_gq *parent;