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-rw-r--r--mm/backing-dev.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 28ce6cf7b2ff..39ce616a9d71 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -759,15 +759,20 @@ static int cgwb_bdi_init(struct backing_dev_info *bdi)
if (!bdi->wb_congested)
return -ENOMEM;
+ atomic_set(&bdi->wb_congested->refcnt, 1);
+
err = wb_init(&bdi->wb, bdi, 1, GFP_KERNEL);
if (err) {
- kfree(bdi->wb_congested);
+ wb_congested_put(bdi->wb_congested);
return err;
}
return 0;
}
-static void cgwb_bdi_destroy(struct backing_dev_info *bdi) { }
+static void cgwb_bdi_destroy(struct backing_dev_info *bdi)
+{
+ wb_congested_put(bdi->wb_congested);
+}
#endif /* CONFIG_CGROUP_WRITEBACK */