block: support to account io_ticks precisely

[linux-block.git] / block / blk.h

diff --git a/block/blk.h b/block/blk.h
index d5107e65355e271a02a9640e88e8e4e4c088d83b..3870bdcd5cad4d20921f08538bc2f1b13a8897fa 100644 (file)
--- a/block/blk.h
+++ b/block/blk.h
@@ -366,6 +366,7 @@ static inline bool blk_do_io_stat(struct request *rq)
 }
 
 void update_io_ticks(struct block_device *part, unsigned long now, bool end);
+unsigned int part_in_flight(struct block_device *part);
 
 static inline void req_set_nomerge(struct request_queue *q, struct request *req)
 {