1 files changed, 6 insertions, 114 deletions

diff --git a/block/blk-wbt.h b/block/blk-wbt.h
index f47218d5b3b2..8a029e138f7a 100644
--- a/block/blk-wbt.h
+++ b/block/blk-wbt.h
@@ -2,139 +2,31 @@
 #ifndef WB_THROTTLE_H
 #define WB_THROTTLE_H
 
-#include <linux/kernel.h>
-#include <linux/atomic.h>
-#include <linux/wait.h>
-#include <linux/timer.h>
-#include <linux/ktime.h>
-
-#include "blk-stat.h"
-#include "blk-rq-qos.h"
-
-enum wbt_flags {
-	WBT_TRACKED		= 1,	/* write, tracked for throttling */
-	WBT_READ		= 2,	/* read */
-	WBT_KSWAPD		= 4,	/* write, from kswapd */
-	WBT_DISCARD		= 8,	/* discard */
-
-	WBT_NR_BITS		= 4,	/* number of bits */
-};
-
-enum {
-	WBT_RWQ_BG		= 0,
-	WBT_RWQ_KSWAPD,
-	WBT_RWQ_DISCARD,
-	WBT_NUM_RWQ,
-};
-
-/*
- * Enable states. Either off, or on by default (done at init time),
- * or on through manual setup in sysfs.
- */
-enum {
-	WBT_STATE_ON_DEFAULT	= 1,
-	WBT_STATE_ON_MANUAL	= 2,
-};
-
-struct rq_wb {
-	/*
-	 * Settings that govern how we throttle
-	 */
-	unsigned int wb_background;		/* background writeback */
-	unsigned int wb_normal;			/* normal writeback */
-
-	short enable_state;			/* WBT_STATE_* */
-
-	/*
-	 * Number of consecutive periods where we don't have enough
-	 * information to make a firm scale up/down decision.
-	 */
-	unsigned int unknown_cnt;
-
-	u64 win_nsec;				/* default window size */
-	u64 cur_win_nsec;			/* current window size */
-
-	struct blk_stat_callback *cb;
-
-	u64 sync_issue;
-	void *sync_cookie;
-
-	unsigned int wc;
-
-	unsigned long last_issue;		/* last non-throttled issue */
-	unsigned long last_comp;		/* last non-throttled comp */
-	unsigned long min_lat_nsec;
-	struct rq_qos rqos;
-	struct rq_wait rq_wait[WBT_NUM_RWQ];
-	struct rq_depth rq_depth;
-};
-
-static inline struct rq_wb *RQWB(struct rq_qos *rqos)
-{
-	return container_of(rqos, struct rq_wb, rqos);
-}
-
-static inline unsigned int wbt_inflight(struct rq_wb *rwb)
-{
-	unsigned int i, ret = 0;
-
-	for (i = 0; i < WBT_NUM_RWQ; i++)
-		ret += atomic_read(&rwb->rq_wait[i].inflight);
-
-	return ret;
-}
-
-
 #ifdef CONFIG_BLK_WBT
 
-int wbt_init(struct request_queue *);
-void wbt_update_limits(struct request_queue *);
-void wbt_disable_default(struct request_queue *);
-void wbt_enable_default(struct request_queue *);
+int wbt_init(struct gendisk *disk);
+void wbt_disable_default(struct gendisk *disk);
+void wbt_enable_default(struct gendisk *disk);
 
 u64 wbt_get_min_lat(struct request_queue *q);
 void wbt_set_min_lat(struct request_queue *q, u64 val);
+bool wbt_disabled(struct request_queue *);
 
-void wbt_set_queue_depth(struct request_queue *, unsigned int);
 void wbt_set_write_cache(struct request_queue *, bool);
 
 u64 wbt_default_latency_nsec(struct request_queue *);
 
 #else
 
-static inline void wbt_track(struct request *rq, enum wbt_flags flags)
-{
-}
-static inline int wbt_init(struct request_queue *q)
-{
-	return -EINVAL;
-}
-static inline void wbt_update_limits(struct request_queue *q)
-{
-}
-static inline void wbt_disable_default(struct request_queue *q)
-{
-}
-static inline void wbt_enable_default(struct request_queue *q)
+static inline void wbt_disable_default(struct gendisk *disk)
 {
 }
-static inline void wbt_set_queue_depth(struct request_queue *q, unsigned int depth)
+static inline void wbt_enable_default(struct gendisk *disk)
 {
 }
 static inline void wbt_set_write_cache(struct request_queue *q, bool wc)
 {
 }
-static inline u64 wbt_get_min_lat(struct request_queue *q)
-{
-	return 0;
-}
-static inline void wbt_set_min_lat(struct request_queue *q, u64 val)
-{
-}
-static inline u64 wbt_default_latency_nsec(struct request_queue *q)
-{
-	return 0;
-}
 
 #endif /* CONFIG_BLK_WBT */