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| author | Christoph Hellwig <hch@lst.de> | 2021-06-02 09:53:18 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-06-11 11:53:02 -0600 |
| commit | b461dfc49eb6fbabc60b9dad476e787ada56b7b4 (patch) | |
| tree | 8858c13ab206fcfaa8bb8828b1e40d84341f788c /block/blk-mq.c | |
| parent | 26a9750aa875126e4b7fc5ee6de652a529c5b7ee (diff) | |
| download | lwn-b461dfc49eb6fbabc60b9dad476e787ada56b7b4.tar.gz lwn-b461dfc49eb6fbabc60b9dad476e787ada56b7b4.zip | |
blk-mq: add the blk_mq_alloc_disk APIs
Add a new API to allocate a gendisk including the request_queue for use
with blk-mq based drivers. This is to avoid boilerplate code in drivers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Link: https://lore.kernel.org/r/20210602065345.355274-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index 8550ad64982f..b123077a0dc4 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -3137,6 +3137,25 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set) } EXPORT_SYMBOL(blk_mq_init_queue); +struct gendisk *__blk_mq_alloc_disk(struct blk_mq_tag_set *set, void *queuedata) +{ + struct request_queue *q; + struct gendisk *disk; + + q = blk_mq_init_queue_data(set, queuedata); + if (IS_ERR(q)) + return ERR_CAST(q); + + disk = __alloc_disk_node(0, set->numa_node); + if (!disk) { + blk_cleanup_queue(q); + return ERR_PTR(-ENOMEM); + } + disk->queue = q; + return disk; +} +EXPORT_SYMBOL(__blk_mq_alloc_disk); + /* * Helper for setting up a queue with mq ops, given queue depth, and * the passed in mq ops flags. |