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writeback: remove bdi->congested_fn

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Except for pktdvd, the only places setting congested bits are file
systems that allocate their own backing_dev_info structures.  And
pktdvd is a deprecated driver that isn't useful in stack setup
either.  So remove the dead congested_fn stacking infrastructure.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Song Liu <song@kernel.org>
Acked-by: David Sterba <dsterba@suse.com>
[axboe: fixup unused variables in bcache/request.c]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2020-07-01 11:06:22 +02:00
committed by Jens Axboe
parent 8c911f3d4c
commit 21cf866145
23 changed files with 1 additions and 468 deletions
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4
include/linux/backing-dev.h
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@@ -169,10 +169,6 @@ static inline struct backing_dev_info *inode_to_bdi(struct inode *inode)
static inline int wb_congested(struct bdi_writeback *wb, int cong_bits)
{
struct backing_dev_info *bdi = wb->bdi;
if (bdi->congested_fn)
return bdi->congested_fn(bdi->congested_data, cong_bits);
return wb->congested & cong_bits;
}