From d5a24b1c6acbb2767223efea8a94666a8a87e03d Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 6 Nov 2018 14:29:11 -0700
Subject: [PATCH 0389/2944] block: for async O_DIRECT, mark us as polling if
 asked to

commit d34513d384487e8022f143a3a6b791e6d7f0dad6 upstream.

Inherit the iocb IOCB_HIPRI flag, and pass on REQ_HIPRI for
those kinds of requests.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Xiaoguang Wang <xiaoguang.wang@linux.alibaba.com>
Acked-by: Caspar Zhang <caspar@linux.alibaba.com>
---
 fs/block_dev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 11fd373..cc22247 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -397,6 +397,9 @@ static void blkdev_bio_end_io(struct bio *bio)
 
 		nr_pages = iov_iter_npages(iter, BIO_MAX_PAGES);
 		if (!nr_pages) {
+			if (iocb->ki_flags & IOCB_HIPRI)
+				bio->bi_opf |= REQ_HIPRI;
+
 			qc = submit_bio(bio);
 			break;
 		}
-- 
1.8.3.1