diff -Nru dm-writeboost-2.2.6/debian/changelog dm-writeboost-2.2.6/debian/changelog
--- dm-writeboost-2.2.6/debian/changelog	2017-10-27 15:16:55.000000000 -0200
+++ dm-writeboost-2.2.6/debian/changelog	2018-06-19 09:03:22.000000000 -0300
@@ -1,3 +1,10 @@
+dm-writeboost (2.2.6-1~16.04.3) xenial; urgency=medium
+
+  * Backport to xenial to support 4.11 and 4.15 kernels. (LP: #1777636)
+    - 0002-ubuntu-compat-4.15.patch
+
+ -- Marcelo Henrique Cerri <marcelo.cerri@canonical.com>  Tue, 19 Jun 2018 09:03:22 -0300
+
 dm-writeboost (2.2.6-1~16.04.2) xenial; urgency=medium
 
   * Backport to xenial to support 4.11 and 4.13 kernels. (LP: #1727334)
diff -Nru dm-writeboost-2.2.6/debian/patches/0002-ubuntu-compat-4.15.patch dm-writeboost-2.2.6/debian/patches/0002-ubuntu-compat-4.15.patch
--- dm-writeboost-2.2.6/debian/patches/0002-ubuntu-compat-4.15.patch	1969-12-31 21:00:00.000000000 -0300
+++ dm-writeboost-2.2.6/debian/patches/0002-ubuntu-compat-4.15.patch	2018-06-18 15:16:25.000000000 -0300
@@ -0,0 +1,83 @@
+--- a/src/dm-writeboost-daemon.c
++++ b/src/dm-writeboost-daemon.c
+@@ -385,7 +385,7 @@
+ 		atomic64_read(&wb->last_flushed_segment_id)
+ 		- atomic64_read(&wb->last_writeback_segment_id);
+ 
+-	u32 nr_max_batch = ACCESS_ONCE(wb->nr_max_batched_writeback);
++	u32 nr_max_batch = READ_ONCE(wb->nr_max_batched_writeback);
+ 	if (wb->nr_writeback_segs != nr_max_batch)
+ 		try_alloc_writeback_ios(wb, nr_max_batch, GFP_NOIO | __GFP_NOWARN);
+ 
+@@ -394,9 +394,9 @@
+ 
+ static bool should_writeback(struct wb_device *wb)
+ {
+-	return ACCESS_ONCE(wb->allow_writeback) ||
+-	       ACCESS_ONCE(wb->urge_writeback)  ||
+-	       ACCESS_ONCE(wb->force_drop);
++	return READ_ONCE(wb->allow_writeback) ||
++	       READ_ONCE(wb->urge_writeback)  ||
++	       READ_ONCE(wb->force_drop);
+ }
+ 
+ static void do_writeback_proc(struct wb_device *wb)
+@@ -475,7 +475,7 @@
+ 
+ 		util = div_u64(100 * (new - old), 1000);
+ 
+-		if (util < ACCESS_ONCE(wb->writeback_threshold))
++		if (util < READ_ONCE(wb->writeback_threshold))
+ 			wb->allow_writeback = true;
+ 		else
+ 			wb->allow_writeback = false;
+@@ -530,7 +530,7 @@
+ 
+ 	while (!kthread_should_stop()) {
+ 		/* sec -> ms */
+-		intvl = ACCESS_ONCE(wb->update_sb_record_interval) * 1000;
++		intvl = READ_ONCE(wb->update_sb_record_interval) * 1000;
+ 
+ 		if (!intvl) {
+ 			schedule_timeout_interruptible(msecs_to_jiffies(1000));
+@@ -552,7 +552,7 @@
+ 
+ 	while (!kthread_should_stop()) {
+ 		/* sec -> ms */
+-		intvl = ACCESS_ONCE(wb->sync_data_interval) * 1000;
++		intvl = READ_ONCE(wb->sync_data_interval) * 1000;
+ 
+ 		if (!intvl) {
+ 			schedule_timeout_interruptible(msecs_to_jiffies(1000));
+--- a/src/dm-writeboost-target.c
++++ b/src/dm-writeboost-target.c
+@@ -132,7 +132,11 @@
+ 
+ static void bio_remap(struct bio *bio, struct dm_dev *dev, sector_t sector)
+ {
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,14,0)
++	bio_set_dev(bio, dev->bdev);
++#else
+ 	bio->bi_bdev = dev->bdev;
++#endif
+ 	bi_sector(bio) = sector;
+ }
+ 
+@@ -779,7 +783,7 @@
+ 
+ 	ASSERT(cells->threshold > 0);
+ 
+-	if (!ACCESS_ONCE(wb->read_cache_threshold))
++	if (!READ_ONCE(wb->read_cache_threshold))
+ 		return false;
+ 
+ 	if (!cells->cursor)
+@@ -970,7 +974,7 @@
+ 		struct read_cache_cell *cell = cells->array + i;
+ 		cell->cancelled = false;
+ 	}
+-	cur_threshold = ACCESS_ONCE(wb->read_cache_threshold);
++	cur_threshold = READ_ONCE(wb->read_cache_threshold);
+ 	if (cur_threshold && (cur_threshold != cells->threshold)) {
+ 		cells->threshold = cur_threshold;
+ 		cells->over_threshold = false;
diff -Nru dm-writeboost-2.2.6/debian/patches/series dm-writeboost-2.2.6/debian/patches/series
--- dm-writeboost-2.2.6/debian/patches/series	2017-10-27 15:15:14.000000000 -0200
+++ dm-writeboost-2.2.6/debian/patches/series	2018-06-18 15:16:45.000000000 -0300
@@ -1 +1,2 @@
 0001-ubuntu-compat-4.13.patch
+0002-ubuntu-compat-4.15.patch