writeback: separate out include/linux/backing-dev-defs.h

[mirror_ubuntu-bionic-kernel.git] / include / linux / backing-dev.h

diff --git a/include/linux/backing-dev.h b/include/linux/backing-dev.h
index d796f49ce87a3771ad82c14b1ee9a419759b634e..5e39f7a8efedf40775a4c953b82059aceeb00868 100644 (file)
--- a/include/linux/backing-dev.h
+++ b/include/linux/backing-dev.h
@@ -8,104 +8,11 @@
 #ifndef _LINUX_BACKING_DEV_H
 #define _LINUX_BACKING_DEV_H
 
-#include <linux/percpu_counter.h>
-#include <linux/log2.h>
-#include <linux/flex_proportions.h>
 #include <linux/kernel.h>
 #include <linux/fs.h>
 #include <linux/sched.h>
-#include <linux/timer.h>
 #include <linux/writeback.h>
-#include <linux/atomic.h>
-#include <linux/sysctl.h>
-#include <linux/workqueue.h>
-
-struct page;
-struct device;
-struct dentry;
-
-/*
- * Bits in bdi_writeback.state
- */
-enum wb_state {
-       WB_async_congested,     /* The async (write) queue is getting full */
-       WB_sync_congested,      /* The sync queue is getting full */
-       WB_registered,          /* bdi_register() was done */
-       WB_writeback_running,   /* Writeback is in progress */
-};
-
-typedef int (congested_fn)(void *, int);
-
-enum wb_stat_item {
-       WB_RECLAIMABLE,
-       WB_WRITEBACK,
-       WB_DIRTIED,
-       WB_WRITTEN,
-       NR_WB_STAT_ITEMS
-};
-
-#define WB_STAT_BATCH (8*(1+ilog2(nr_cpu_ids)))
-
-struct bdi_writeback {
-       struct backing_dev_info *bdi;   /* our parent bdi */
-
-       unsigned long state;            /* Always use atomic bitops on this */
-       unsigned long last_old_flush;   /* last old data flush */
-
-       struct list_head b_dirty;       /* dirty inodes */
-       struct list_head b_io;          /* parked for writeback */
-       struct list_head b_more_io;     /* parked for more writeback */
-       struct list_head b_dirty_time;  /* time stamps are dirty */
-       spinlock_t list_lock;           /* protects the b_* lists */
-
-       struct percpu_counter stat[NR_WB_STAT_ITEMS];
-
-       unsigned long bw_time_stamp;    /* last time write bw is updated */
-       unsigned long dirtied_stamp;
-       unsigned long written_stamp;    /* pages written at bw_time_stamp */
-       unsigned long write_bandwidth;  /* the estimated write bandwidth */
-       unsigned long avg_write_bandwidth; /* further smoothed write bw */
-
-       /*
-        * The base dirty throttle rate, re-calculated on every 200ms.
-        * All the bdi tasks' dirty rate will be curbed under it.
-        * @dirty_ratelimit tracks the estimated @balanced_dirty_ratelimit
-        * in small steps and is much more smooth/stable than the latter.
-        */
-       unsigned long dirty_ratelimit;
-       unsigned long balanced_dirty_ratelimit;
-
-       struct fprop_local_percpu completions;
-       int dirty_exceeded;
-
-       spinlock_t work_lock;           /* protects work_list & dwork scheduling */
-       struct list_head work_list;
-       struct delayed_work dwork;      /* work item used for writeback */
-};
-
-struct backing_dev_info {
-       struct list_head bdi_list;
-       unsigned long ra_pages; /* max readahead in PAGE_CACHE_SIZE units */
-       unsigned int capabilities; /* Device capabilities */
-       congested_fn *congested_fn; /* Function pointer if device is md/dm */
-       void *congested_data;   /* Pointer to aux data for congested func */
-
-       char *name;
-
-       unsigned int min_ratio;
-       unsigned int max_ratio, max_prop_frac;
-
-       struct bdi_writeback wb;  /* default writeback info for this bdi */
-
-       struct device *dev;
-
-       struct timer_list laptop_mode_wb_timer;
-
-#ifdef CONFIG_DEBUG_FS
-       struct dentry *debug_dir;
-       struct dentry *debug_stats;
-#endif
-};
+#include <linux/backing-dev-defs.h>
 
 struct backing_dev_info *inode_to_bdi(struct inode *inode);
 
@@ -265,13 +172,6 @@ static inline int bdi_rw_congested(struct backing_dev_info *bdi)
                                  (1 << WB_async_congested));
 }
 
-enum {
-       BLK_RW_ASYNC    = 0,
-       BLK_RW_SYNC     = 1,
-};
-
-void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
-void set_bdi_congested(struct backing_dev_info *bdi, int sync);
 long congestion_wait(int sync, long timeout);
 long wait_iff_congested(struct zone *zone, int sync, long timeout);
 int pdflush_proc_obsolete(struct ctl_table *table, int write,