From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 27 Jun 2017 17:51:28 +0000 (-0600)
Subject: btrfs: add support for passing in write hints for buffered writes
X-Git-Tag: v4.14-rc1~651^2~44
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e6959b9350c6135b260d7b561153d9ad6c5d49ff;p=platform%2Fkernel%2Flinux-rpi3.git

btrfs: add support for passing in write hints for buffered writes

Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 19eedf2..d1cd601 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2830,6 +2830,7 @@ static int submit_extent_page(int op, int op_flags, struct extent_io_tree *tree,
 	bio_add_page(bio, page, page_size, offset);
 	bio->bi_end_io = end_io_func;
 	bio->bi_private = tree;
+	bio->bi_write_hint = page->mapping->host->i_write_hint;
 	bio_set_op_attrs(bio, op, op_flags);
 	if (wbc) {
 		wbc_init_bio(wbc, bio);