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| author | Damien Le Moal <dlemoal@kernel.org> | 2024-04-08 04:41:22 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-04-17 17:44:03 +0300 |
| commit | e4eb37cc0f3ed8971c50dddfbeb35a799e5b504e (patch) | |
| tree | 8dd2d201d06ea88c2c863477a0ad4552c8d079f4 /block/elevator.h | |
| parent | fde02699c242e88a71286677d27cc890a959b67f (diff) | |
| download | linux-e4eb37cc0f3ed8971c50dddfbeb35a799e5b504e.tar.xz | |
block: Remove elevator required features
The only elevator feature ever implemented is ELEVATOR_F_ZBD_SEQ_WRITE
for signaling that a scheduler implements zone write locking to tightly
control the dispatching order of write operations to zoned block
devices. With the removal of zone write locking support in mq-deadline
and the reliance of all block device drivers on the block layer zone
write plugging to control ordering of write operations to zones, the
elevator feature ELEVATOR_F_ZBD_SEQ_WRITE is completely unused.
Remove it, and also remove the now unused code for filtering the
possible schedulers for a block device based on required features.
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20240408014128.205141-23-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.h')
| -rw-r--r-- | block/elevator.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/block/elevator.h b/block/elevator.h index 7ca3d7b6ed82..e9a050a96e53 100644 --- a/block/elevator.h +++ b/block/elevator.h @@ -74,7 +74,6 @@ struct elevator_type struct elv_fs_entry *elevator_attrs; const char *elevator_name; const char *elevator_alias; - const unsigned int elevator_features; struct module *elevator_owner; #ifdef CONFIG_BLK_DEBUG_FS const struct blk_mq_debugfs_attr *queue_debugfs_attrs; |