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authorGravatar Damien Le Moal <dlemoal@kernel.org> 2024-04-08 10:41:22 +0900
committerGravatar Jens Axboe <axboe@kernel.dk> 2024-04-17 08:44:03 -0600
commite4eb37cc0f3ed8971c50dddfbeb35a799e5b504e (patch)
tree8dd2d201d06ea88c2c863477a0ad4552c8d079f4 /block/blk-settings.c
parentblock: mq-deadline: Remove support for zone write locking (diff)
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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/blk-settings.c')
-rw-r--r--block/blk-settings.c16
1 files changed, 0 insertions, 16 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index c0197e1e7485..715f4b6356c4 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -1053,22 +1053,6 @@ void blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
EXPORT_SYMBOL_GPL(blk_queue_write_cache);
/**
- * blk_queue_required_elevator_features - Set a queue required elevator features
- * @q: the request queue for the target device
- * @features: Required elevator features OR'ed together
- *
- * Tell the block layer that for the device controlled through @q, only the
- * only elevators that can be used are those that implement at least the set of
- * features specified by @features.
- */
-void blk_queue_required_elevator_features(struct request_queue *q,
- unsigned int features)
-{
- q->required_elevator_features = features;
-}
-EXPORT_SYMBOL_GPL(blk_queue_required_elevator_features);
-
-/**
* blk_queue_can_use_dma_map_merging - configure queue for merging segments.
* @q: the request queue for the device
* @dev: the device pointer for dma