block: unexport blk_alloc_queue

blk_alloc_queue is just an internal helper now, unexport it and remove
it from the public header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20210521055116.1053587-27-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-core.c

@@ -599,7 +599,6 @@ struct request_queue *blk_alloc_queue(int node_id)
 	kmem_cache_free(blk_requestq_cachep, q);
 	return NULL;
 }
-EXPORT_SYMBOL(blk_alloc_queue);
 
 /**
  * blk_get_queue - increment the request_queue refcount

block/blk.h

@@ -359,4 +359,6 @@ int bio_add_hw_page(struct request_queue *q, struct bio *bio,
 		struct page *page, unsigned int len, unsigned int offset,
 		unsigned int max_sectors, bool *same_page);
 
+struct request_queue *blk_alloc_queue(int node_id);
+
 #endif /* BLK_INTERNAL_H */

include/linux/blkdev.h

@@ -1213,7 +1213,6 @@ static inline int blk_rq_map_sg(struct request_queue *q, struct request *rq,
 extern void blk_dump_rq_flags(struct request *, char *);
 
 bool __must_check blk_get_queue(struct request_queue *);
-struct request_queue *blk_alloc_queue(int node_id);
 extern void blk_put_queue(struct request_queue *);
 extern void blk_set_queue_dying(struct request_queue *);