blk-mq: move the kdump check to blk_mq_alloc_tag_set
blk-mq: move the kdump check to blk_mq_alloc_tag_set

We call blk_mq_alloc_tag_set() first then blk_mq_init_queue(). The requests are
allocated in the former function. So the kdump check should be moved to there
to really save memory.

Signed-off-by: Shaohua Li <c0c0c8857ed6ec93282de3ee9d47e224acf995af@fb.com>
Signed-off-by: Jens Axboe <cd8c6775e60d6f67a6984377324e5290df3d5358@fb.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs