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block: add a queue_limits_set helper

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Add a small wrapper around queue_limits_commit_update for stacking
drivers that don't want to update existing limits, but set an
entirely new set.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20240228225653.947152-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2024-02-28 14:56:40 -08:00 committed by Jens Axboe
parent 86b1e613eb
commit 631d4efb80
2 changed files with 19 additions and 0 deletions
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18
block/blk-settings.c
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@ -266,6 +266,24 @@ int queue_limits_commit_update(struct request_queue *q,
} }
EXPORT_SYMBOL_GPL(queue_limits_commit_update); EXPORT_SYMBOL_GPL(queue_limits_commit_update);
/**
* queue_limits_commit_set - apply queue limits to queue
* @q: queue to update
* @lim: limits to apply
*
* Apply the limits in @lim that were freshly initialized to @q.
* To update existing limits use queue_limits_start_update() and
* queue_limits_commit_update() instead.
*
* Returns 0 if successful, else a negative error code.
*/
int queue_limits_set(struct request_queue *q, struct queue_limits *lim)
{
mutex_lock(&q->limits_lock);
return queue_limits_commit_update(q, lim);
}
EXPORT_SYMBOL_GPL(queue_limits_set);
/** /**
* blk_queue_bounce_limit - set bounce buffer limit for queue * blk_queue_bounce_limit - set bounce buffer limit for queue
* @q: the request queue for the device * @q: the request queue for the device

1
include/linux/blkdev.h
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@ -889,6 +889,7 @@ queue_limits_start_update(struct request_queue *q)
} }
int queue_limits_commit_update(struct request_queue *q, int queue_limits_commit_update(struct request_queue *q,
struct queue_limits *lim); struct queue_limits *lim);
int queue_limits_set(struct request_queue *q, struct queue_limits *lim);
/* /*
* Access functions for manipulating queue properties * Access functions for manipulating queue properties