[PATCH v8 03/18] block, dax: remove dead code in blkdev_writepages()

[Dan Williams <dan.j.williams@xxxxxxxxx>]

Block device inodes never have S_DAX set, so kill the check for DAX and
diversion to dax_writeback_mapping_range().

Cc: Jeff Moyer <jmoyer@xxxxxxxxxx>
Cc: Ross Zwisler <ross.zwisler@xxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
 fs/block_dev.c |    5 -----
 1 file changed, 5 deletions(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index fe09ef9c21f3..846ee2d31781 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1946,11 +1946,6 @@ static int blkdev_releasepage(struct page *page, gfp_t wait)
 static int blkdev_writepages(struct address_space *mapping,
 			     struct writeback_control *wbc)
 {
-	if (dax_mapping(mapping)) {
-		struct block_device *bdev = I_BDEV(mapping->host);
-
-		return dax_writeback_mapping_range(mapping, bdev, wbc);
-	}
 	return generic_writepages(mapping, wbc);
 }