block: add a blk_mq_init_queue_data helper
authorChristoph Hellwig <hch@lst.de>
Fri, 27 Mar 2020 08:30:08 +0000 (09:30 +0100)
committerJens Axboe <axboe@kernel.dk>
Fri, 27 Mar 2020 16:23:43 +0000 (10:23 -0600)
commit2f227bb99934a4faa6dfe2cda2594bce8897a323
treececb9d1c85abf4a3f4f4f93610e04432202052bc
parent348e114bbd4dce430eae70f01a04c8fc259b4cf1
block: add a blk_mq_init_queue_data helper

This allows a driver to pass a queuedata member before ->init_hctx is
called.  null_blk currently open codes this logic, but I'd rather have
it in the core to ease future maintainance.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/blk-mq.c
include/linux/blk-mq.h