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-rw-r--r--block/blk-throttle.c1
-rw-r--r--block/blk.h15
2 files changed, 15 insertions, 1 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index a19f58c6fc3..f3f495ea4ee 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -10,6 +10,7 @@
#include <linux/bio.h>
#include <linux/blktrace_api.h>
#include "blk-cgroup.h"
+#include "blk.h"
/* Max dispatch from a group in 1 round */
static int throtl_grp_quantum = 8;
diff --git a/block/blk.h b/block/blk.h
index 20b900a377c..da247ba2aea 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -188,4 +188,17 @@ static inline int blk_do_io_stat(struct request *rq)
(rq->cmd_flags & REQ_DISCARD));
}
-#endif
+#ifdef CONFIG_BLK_DEV_THROTTLING
+extern int blk_throtl_bio(struct request_queue *q, struct bio **bio);
+extern int blk_throtl_init(struct request_queue *q);
+extern void blk_throtl_exit(struct request_queue *q);
+#else /* CONFIG_BLK_DEV_THROTTLING */
+static inline int blk_throtl_bio(struct request_queue *q, struct bio **bio)
+{
+ return 0;
+}
+static inline int blk_throtl_init(struct request_queue *q) { return 0; }
+static inline void blk_throtl_exit(struct request_queue *q) { }
+#endif /* CONFIG_BLK_DEV_THROTTLING */
+
+#endif /* BLK_INTERNAL_H */