1 files changed, 0 insertions, 141 deletions
diff --git a/include/linux/wbt.h b/include/linux/wbt.h
deleted file mode 100644
index 68ba75e3a..000000000
--- a/include/linux/wbt.h
+++ /dev/null
@@ -1,141 +0,0 @@
-#ifndef WB_THROTTLE_H
-#define WB_THROTTLE_H
-
-#include <linux/atomic.h>
-#include <linux/wait.h>
-#include <linux/timer.h>
-#include <linux/ktime.h>
-
-enum wbt_flags {
-	WBT_TRACKED		= 1,	/* write, tracked for throttling */
-	WBT_READ		= 2,	/* read */
-	WBT_KSWAPD		= 4,	/* write, from kswapd */
-
-	WBT_NR_BITS		= 3,	/* number of bits */
-};
-
-enum {
-	/*
-	 * Set aside 3 bits for state, rest is a time stamp
-	 */
-	ISSUE_STAT_SHIFT	= 64 - WBT_NR_BITS,
-	ISSUE_STAT_MASK 	= ~((1ULL << ISSUE_STAT_SHIFT) - 1),
-	ISSUE_STAT_TIME_MASK	= ~ISSUE_STAT_MASK,
-
-	WBT_NUM_RWQ		= 2,
-};
-
-struct wb_issue_stat {
-	u64 time;
-};
-
-static inline void wbt_issue_stat_set_time(struct wb_issue_stat *stat)
-{
-	stat->time = (stat->time & ISSUE_STAT_MASK) |
-			(ktime_to_ns(ktime_get()) & ISSUE_STAT_TIME_MASK);
-}
-
-static inline u64 wbt_issue_stat_get_time(struct wb_issue_stat *stat)
-{
-	return stat->time & ISSUE_STAT_TIME_MASK;
-}
-
-static inline void wbt_clear_state(struct wb_issue_stat *stat)
-{
-	stat->time &= ISSUE_STAT_TIME_MASK;
-}
-
-static inline enum wbt_flags wbt_stat_to_mask(struct wb_issue_stat *stat)
-{
-	return (stat->time & ISSUE_STAT_MASK) >> ISSUE_STAT_SHIFT;
-}
-
-static inline void wbt_track(struct wb_issue_stat *stat, enum wbt_flags wb_acct)
-{
-	stat->time |= ((u64) wb_acct) << ISSUE_STAT_SHIFT;
-}
-
-static inline bool wbt_is_tracked(struct wb_issue_stat *stat)
-{
-	return (stat->time >> ISSUE_STAT_SHIFT) & WBT_TRACKED;
-}
-
-static inline bool wbt_is_read(struct wb_issue_stat *stat)
-{
-	return (stat->time >> ISSUE_STAT_SHIFT) & WBT_READ;
-}
-
-struct wb_stat_ops {
-	void (*get)(void *, struct blk_rq_stat *);
-	bool (*is_current)(struct blk_rq_stat *);
-	void (*clear)(void *);
-};
-
-struct rq_wait {
-	wait_queue_head_t wait;
-	atomic_t inflight;
-};
-
-struct rq_wb {
-	/*
-	 * Settings that govern how we throttle
-	 */
-	unsigned int wb_background;		/* background writeback */
-	unsigned int wb_normal;			/* normal writeback */
-	unsigned int wb_max;			/* max throughput writeback */
-	int scale_step;
-	bool scaled_max;
-
-	/*
-	 * 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 timer_list window_timer;
-
-	s64 sync_issue;
-	void *sync_cookie;
-
-	unsigned int wc;
-	unsigned int queue_depth;
-
-	unsigned long last_issue;		/* last non-throttled issue */
-	unsigned long last_comp;		/* last non-throttled comp */
-	unsigned long min_lat_nsec;
-	struct backing_dev_info *bdi;
-	struct rq_wait rq_wait[WBT_NUM_RWQ];
-
-	struct wb_stat_ops *stat_ops;
-	void *ops_data;
-};
-
-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;
-}
-
-struct backing_dev_info;
-
-void __wbt_done(struct rq_wb *, enum wbt_flags);
-void wbt_done(struct rq_wb *, struct wb_issue_stat *);
-enum wbt_flags wbt_wait(struct rq_wb *, unsigned int, spinlock_t *);
-struct rq_wb *wbt_init(struct backing_dev_info *, struct wb_stat_ops *, void *);
-void wbt_exit(struct rq_wb *);
-void wbt_update_limits(struct rq_wb *);
-void wbt_requeue(struct rq_wb *, struct wb_issue_stat *);
-void wbt_issue(struct rq_wb *, struct wb_issue_stat *);
-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);
-
-#endif