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-rw-r--r--block/blk-wbt.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/block/blk-wbt.h b/block/blk-wbt.h
index 44dc217..9dfc88a 100644
--- a/block/blk-wbt.h
+++ b/block/blk-wbt.h
@@ -110,6 +110,8 @@ void wbt_disable(struct rq_wb *);
void wbt_set_queue_depth(struct rq_wb *, unsigned int);
void wbt_set_write_cache(struct rq_wb *, bool);
+u64 wbt_default_latency_nsec(struct request_queue *);
+
#else
static inline void __wbt_done(struct rq_wb *rwb, enum wbt_flags flags)
@@ -148,6 +150,10 @@ static inline void wbt_set_queue_depth(struct rq_wb *rwb, unsigned int depth)
static inline void wbt_set_write_cache(struct rq_wb *rwb, bool wc)
{
}
+static inline u64 wbt_default_latency_nsec(struct request_queue *q)
+{
+ return 0;
+}
#endif /* CONFIG_BLK_WBT */