+ brd-remove-brd_rw_page.patch added to -mm tree

+ brd-remove-brd_rw_page.patch added to -mm tree

[akpm]

The patch titled
     Subject: drivers/block/brd.c: remove brd_rw_page()
has been added to the -mm tree.  Its filename is
     brd-remove-brd_rw_page.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/brd-remove-brd_rw_page.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/brd-remove-brd_rw_page.patch

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------------------------------------------------------
From: Ross Zwisler <ross.zwisler@linux.intel.com>
Subject: drivers/block/brd.c: remove brd_rw_page()

The rw_page() interface doesn't provide a clear performance benefit for
BRD and has had a nonzero maintenance burden, so remove it.

Link: http://lkml.kernel.org/r/20170728165604.10455-4-ross.zwisler@linux.intel.com
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Suggested-by: Dan Williams <dan.j.williams@intel.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: "karam . lee" <karam.lee@lge.com>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Seungho Park <seungho1.park@lge.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/block/brd.c |   14 --------------
 1 file changed, 14 deletions(-)

diff -puN drivers/block/brd.c~brd-remove-brd_rw_page drivers/block/brd.c
--- a/drivers/block/brd.c~brd-remove-brd_rw_page
+++ a/drivers/block/brd.c
@@ -322,19 +322,6 @@ io_error:
 	return BLK_QC_T_NONE;
 }
 
-static int brd_rw_page(struct block_device *bdev, sector_t sector,
-		       struct page *page, bool is_write)
-{
-	struct brd_device *brd = bdev->bd_disk->private_data;
-	int err;
-
-	if (PageTransHuge(page))
-		return -ENOTSUPP;
-	err = brd_do_bvec(brd, page, PAGE_SIZE, 0, is_write, sector);
-	page_endio(page, is_write, err);
-	return err;
-}