for-next: add 0001-bcache-Populate-writeback_rate_minimum-attribute.patch
diff --git a/for-next/0001-bcache-Populate-writeback_rate_minimum-attribute.patch b/for-next/0001-bcache-Populate-writeback_rate_minimum-attribute.patch
new file mode 100644
index 0000000..079dfd0
--- /dev/null
+++ b/for-next/0001-bcache-Populate-writeback_rate_minimum-attribute.patch
@@ -0,0 +1,46 @@
+From 7d9becb538aebd660e6eb43077fe14652f6470c5 Mon Sep 17 00:00:00 2001
+From: Ben Peddell <klightspeed@killerwolves.net>
+Date: Fri, 14 Sep 2018 08:27:34 +1000
+Subject: [PATCH] bcache: Populate writeback_rate_minimum attribute
+
+Forgot to include the maintainers with my first email.
+
+Somewhere between Michael Lyle's original
+"bcache: PI controller for writeback rate V2" patch dated 07 Sep 2017
+and 1d316e6 bcache: implement PI controller for writeback rate,
+the mapping of the writeback_rate_minimum attribute was dropped.
+
+Re-add the missing sysfs writeback_rate_minimum attribute mapping to
+"allow the user to specify a minimum rate at which dirty blocks are
+retired."
+
+Fixes: 1d316e6 bcache: implement PI controller for writeback rate
+Signed-off-by: Ben Peddell <klightspeed@killerwolves.net>
+Signed-off-by: Coly Li <colyli@suse.de>
+---
+ drivers/md/bcache/sysfs.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/drivers/md/bcache/sysfs.c b/drivers/md/bcache/sysfs.c
+index 225b15aa0340..34819f2c257d 100644
+--- a/drivers/md/bcache/sysfs.c
++++ b/drivers/md/bcache/sysfs.c
+@@ -263,6 +263,7 @@ STORE(__cached_dev)
+ 1, WRITEBACK_RATE_UPDATE_SECS_MAX);
+ d_strtoul(writeback_rate_i_term_inverse);
+ d_strtoul_nonzero(writeback_rate_p_term_inverse);
++ d_strtoul_nonzero(writeback_rate_minimum);
+
+ sysfs_strtoul_clamp(io_error_limit, dc->error_limit, 0, INT_MAX);
+
+@@ -389,6 +390,7 @@ static struct attribute *bch_cached_dev_files[] = {
+ &sysfs_writeback_rate_update_seconds,
+ &sysfs_writeback_rate_i_term_inverse,
+ &sysfs_writeback_rate_p_term_inverse,
++ &sysfs_writeback_rate_minimum,
+ &sysfs_writeback_rate_debug,
+ &sysfs_errors,
+ &sysfs_io_error_limit,
+--
+2.16.4
+
