block: simplify ioc_lookup_icq

Remove the ioc argument as it always points to current->io_context.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20211126115817.2087431-15-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/blk.h b/block/blk.h
index 187cb265..3be0fdf 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -364,7 +364,7 @@ static inline unsigned int bio_aligned_discard_max_sectors(
  * Internal io_context interface
  */
 struct io_cq *ioc_find_get_icq(struct request_queue *q);
-struct io_cq *ioc_lookup_icq(struct io_context *ioc, struct request_queue *q);
+struct io_cq *ioc_lookup_icq(struct request_queue *q);
 void ioc_clear_queue(struct request_queue *q);
 
 #ifdef CONFIG_BLK_DEV_THROTTLING_LOW