blk-mq: use BLK_MQ_NO_TAG for no tag
Replace various magic -1 constants for tags with BLK_MQ_NO_TAG. Signed-off-by:Xianting Tian <tian.xianting@h3c.com> Signed-off-by:
Jens Axboe <axboe@kernel.dk>
parent
cdfcef9e
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