Btrfs: Bring back mount -o ssd optimizations
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 7e3a1eb..6dab664 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1730,6 +1730,8 @@
if (bio_ret && *bio_ret) {
bio = *bio_ret;
if (bio->bi_sector + (bio->bi_size >> 9) != sector ||
+ (tree->ops && tree->ops->merge_bio_hook &&
+ tree->ops->merge_bio_hook(page, offset, size, bio)) ||
bio_add_page(bio, page, size, offset) < size) {
ret = submit_one_bio(rw, bio);
bio = NULL;