These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / md / bcache / writeback.h

diff --git a/kernel/drivers/md/bcache/writeback.h b/kernel/drivers/md/bcache/writeback.h
index 0a9dab1..073a042 100644 (file)
--- a/kernel/drivers/md/bcache/writeback.h
+++ b/kernel/drivers/md/bcache/writeback.h
@@ -63,7 +63,8 @@ static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
 
 static inline void bch_writeback_queue(struct cached_dev *dc)
 {
-       wake_up_process(dc->writeback_thread);
+       if (!IS_ERR_OR_NULL(dc->writeback_thread))
+               wake_up_process(dc->writeback_thread);
 }
 
 static inline void bch_writeback_add(struct cached_dev *dc)