From: Dan Williams <dan.j.williams@intel.com>
Date: Sun, 11 Mar 2018 19:03:08 +0000 (-0700)
Subject: block, dax: remove dead code in blkdev_writepages()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=15aa8a01189b7399d085cceae6775cc6899b1909;p=linux.git

block, dax: remove dead code in blkdev_writepages()

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@redhat.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Dave Chinner <david@fromorbit.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/fs/block_dev.c b/fs/block_dev.c
index fe09ef9c21f34..846ee2d31781b 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);
 }