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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-defs.h
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@@ -33,8 +33,6 @@ enum wb_congested_state {
WB_sync_congested, /* The sync queue is getting full */
};
typedef int (congested_fn)(void *, int);
enum wb_stat_item {
WB_RECLAIMABLE,
WB_WRITEBACK,
@@ -170,8 +168,6 @@ struct backing_dev_info {
struct list_head bdi_list;
unsigned long ra_pages; /* max readahead in PAGE_SIZE units */
unsigned long io_pages; /* max allowed IO size */
congested_fn *congested_fn; /* Function pointer if device is md/dm */
void *congested_data; /* Pointer to aux data for congested func */
struct kref refcnt; /* Reference counter for the structure */
unsigned int capabilities; /* Device capabilities */