linux-kernel - [PATCH 4.14 45/53] dm: set QUEUE_FLAG_DAX accordingly in dm_table_set

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Date:   Tue, 10 Jul 2018 20:25:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mike Snitzer <snitzer@...hat.com>,
        Ross Zwisler <ross.zwisler@...ux.intel.com>
Subject: [PATCH 4.14 45/53] dm: set QUEUE_FLAG_DAX accordingly in dm_table_set_restrictions()

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mike Snitzer <snitzer@...hat.com>

commit ad3793fc3945173f64d82d05d3ecde41f6c0435c upstream.

Rather than having DAX support be unique by setting it based on table
type in dm_setup_md_queue().

Signed-off-by: Mike Snitzer <snitzer@...hat.com>
Signed-off-by: Ross Zwisler <ross.zwisler@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/md/dm-table.c |    2 ++
 drivers/md/dm.c       |    3 ---
 2 files changed, 2 insertions(+), 3 deletions(-)

--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -1813,6 +1813,8 @@ void dm_table_set_restrictions(struct dm
 	}
 	blk_queue_write_cache(q, wc, fua);
 
+	if (dm_table_supports_dax(t))
+		queue_flag_set_unlocked(QUEUE_FLAG_DAX, q);
 	if (dm_table_supports_dax_write_cache(t))
 		dax_write_cache(t->md->dax_dev, true);
 
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2050,9 +2050,6 @@ int dm_setup_md_queue(struct mapped_devi
 		 */
 		bioset_free(md->queue->bio_split);
 		md->queue->bio_split = NULL;
-
-		if (type == DM_TYPE_DAX_BIO_BASED)
-			queue_flag_set_unlocked(QUEUE_FLAG_DAX, md->queue);
 		break;
 	case DM_TYPE_NONE:
 		WARN_ON_ONCE(true);