block: add a poll_fn callback to struct request_queue

That we we can also poll non blk-mq queues.  Mostly needed for
the NVMe multipath code, but could also be useful elsewhere.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/page_io.c b/mm/page_io.c
index 21502d341a67..ff04de630c46 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -407,7 +407,7 @@ int swap_readpage(struct page *page, bool do_poll)
                 if (!READ_ONCE(bio->bi_private))
                         break;
 
-                if (!blk_mq_poll(disk->queue, qc))
+                if (!blk_poll(disk->queue, qc))
                         break;
         }
         __set_current_state(TASK_RUNNING);