[PATCH v2] block: blk-mq.c: fix @at_head kernel-doc warning

[Randy Dunlap <rdunlap@infradead.org>]

Fix a new kernel-doc warning in block/blk-mq.c:

../block/blk-mq.c:1844: warning: Function parameter or member 'at_head' not described in 'blk_mq_request_bypass_insert'

Fixes: 01e99aeca397 ("blk-mq: insert passthrough request into hctx->dispatch directly")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: André Almeida <andrealmeid@collabora.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org
---
v2: correct Fixes: Commit-ID + Cc: to author.

 block/blk-mq.c |    1 +
 1 file changed, 1 insertion(+)

--- lnx-59-rc1.orig/block/blk-mq.c
+++ lnx-59-rc1/block/blk-mq.c
@@ -1834,6 +1834,7 @@ void __blk_mq_insert_request(struct blk_
 /**
  * blk_mq_request_bypass_insert - Insert a request at dispatch list.
  * @rq: Pointer to request to be inserted.
+ * @at_head: true if the request should be inserted at the head of the list.
  * @run_queue: If we should run the hardware queue after inserting the request.
  *
  * Should only be used carefully, when the caller knows we want to