From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-f196.google.com ([209.85.210.196]:38679 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728694AbeLKAQE (ORCPT ); Mon, 10 Dec 2018 19:16:04 -0500 Received: by mail-pf1-f196.google.com with SMTP id q1so6196555pfi.5 for ; Mon, 10 Dec 2018 16:16:04 -0800 (PST) From: Jens Axboe To: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-aio@kvack.org Cc: hch@lst.de, jmoyer@redhat.com, clm@fb.com, Jens Axboe Subject: [PATCH 03/27] block: wire up block device iopoll method Date: Mon, 10 Dec 2018 17:15:25 -0700 Message-Id: <20181211001549.30085-4-axboe@kernel.dk> In-Reply-To: <20181211001549.30085-1-axboe@kernel.dk> References: <20181211001549.30085-1-axboe@kernel.dk> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: From: Christoph Hellwig Just call blk_poll on the iocb cookie, we can derive the block device from the inode trivially. Reviewed-by: Johannes Thumshirn Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe --- fs/block_dev.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/block_dev.c b/fs/block_dev.c index e1886cc7048f..6de8d35f6e41 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -281,6 +281,14 @@ struct blkdev_dio { static struct bio_set blkdev_dio_pool; +static int blkdev_iopoll(struct kiocb *kiocb, bool wait) +{ + struct block_device *bdev = I_BDEV(kiocb->ki_filp->f_mapping->host); + struct request_queue *q = bdev_get_queue(bdev); + + return blk_poll(q, READ_ONCE(kiocb->ki_cookie), wait); +} + static void blkdev_bio_end_io(struct bio *bio) { struct blkdev_dio *dio = bio->bi_private; @@ -398,6 +406,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages) bio->bi_opf |= REQ_HIPRI; qc = submit_bio(bio); + WRITE_ONCE(iocb->ki_cookie, qc); break; } @@ -2070,6 +2079,7 @@ const struct file_operations def_blk_fops = { .llseek = block_llseek, .read_iter = blkdev_read_iter, .write_iter = blkdev_write_iter, + .iopoll = blkdev_iopoll, .mmap = generic_file_mmap, .fsync = blkdev_fsync, .unlocked_ioctl = block_ioctl, -- 2.17.1