Merge branch 'ib/4.17-bitmap' into next

Bring in bitmap API improvements.

12 files changed, 316 insertions, 304 deletions

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 6f823f44b4aa..e0acbcefb2ba 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3859,7 +3859,7 @@ static int __load_dirty_region_bitmap(struct raid_set *rs)
 	/* Try loading the bitmap unless "raid0", which does not have one */
 	if (!rs_is_raid0(rs) &&
 	    !test_and_set_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags)) {
-		r = bitmap_load(&rs->md);
+		r = md_bitmap_load(&rs->md);
 		if (r)
 			DMERR("Failed to load bitmap");
 	}
@@ -3987,8 +3987,8 @@ static int raid_preresume(struct dm_target *ti)
 	/* Resize bitmap to adjust to changed region size (aka MD bitmap chunksize) */
 	if (test_bit(RT_FLAG_RS_BITMAP_LOADED, &rs->runtime_flags) && mddev->bitmap &&
 	    mddev->bitmap_info.chunksize != to_bytes(rs->requested_bitmap_chunk_sectors)) {
-		r = bitmap_resize(mddev->bitmap, mddev->dev_sectors,
-				  to_bytes(rs->requested_bitmap_chunk_sectors), 0);
+		r = md_bitmap_resize(mddev->bitmap, mddev->dev_sectors,
+				     to_bytes(rs->requested_bitmap_chunk_sectors), 0);
 		if (r)
 			DMERR("Failed to resize bitmap");
 	}
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index 239c7bb3929b..712a20c4608c 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -46,8 +46,8 @@ static inline char *bmname(struct bitmap *bitmap)
  * if we find our page, we increment the page's refcount so that it stays
  * allocated while we're using it
  */
-static int bitmap_checkpage(struct bitmap_counts *bitmap,
-			    unsigned long page, int create, int no_hijack)
+static int md_bitmap_checkpage(struct bitmap_counts *bitmap,
+			       unsigned long page, int create, int no_hijack)
 __releases(bitmap->lock)
 __acquires(bitmap->lock)
 {
@@ -115,7 +115,7 @@ __acquires(bitmap->lock)
 /* if page is completely empty, put it back on the free list, or dealloc it */
 /* if page was hijacked, unmark the flag so it might get alloced next time */
 /* Note: lock should be held when calling this */
-static void bitmap_checkfree(struct bitmap_counts *bitmap, unsigned long page)
+static void md_bitmap_checkfree(struct bitmap_counts *bitmap, unsigned long page)
 {
 	char *ptr;
 
@@ -280,7 +280,7 @@ restart:
 	return -EINVAL;
 }
 
-static void bitmap_file_kick(struct bitmap *bitmap);
+static void md_bitmap_file_kick(struct bitmap *bitmap);
 /*
  * write out a page to a file
  */
@@ -310,7 +310,7 @@ static void write_page(struct bitmap *bitmap, struct page *page, int wait)
 				   atomic_read(&bitmap->pending_writes)==0);
 	}
 	if (test_bit(BITMAP_WRITE_ERROR, &bitmap->flags))
-		bitmap_file_kick(bitmap);
+		md_bitmap_file_kick(bitmap);
 }
 
 static void end_bitmap_write(struct buffer_head *bh, int uptodate)
@@ -421,11 +421,11 @@ out:
  */
 
 /*
- * bitmap_wait_writes() should be called before writing any bitmap
+ * md_bitmap_wait_writes() should be called before writing any bitmap
  * blocks, to ensure previous writes, particularly from
- * bitmap_daemon_work(), have completed.
+ * md_bitmap_daemon_work(), have completed.
  */
-static void bitmap_wait_writes(struct bitmap *bitmap)
+static void md_bitmap_wait_writes(struct bitmap *bitmap)
 {
 	if (bitmap->storage.file)
 		wait_event(bitmap->write_wait,
@@ -443,7 +443,7 @@ static void bitmap_wait_writes(struct bitmap *bitmap)
 
 
 /* update the event counter and sync the superblock to disk */
-void bitmap_update_sb(struct bitmap *bitmap)
+void md_bitmap_update_sb(struct bitmap *bitmap)
 {
 	bitmap_super_t *sb;
 
@@ -476,10 +476,10 @@ void bitmap_update_sb(struct bitmap *bitmap)
 	kunmap_atomic(sb);
 	write_page(bitmap, bitmap->storage.sb_page, 1);
 }
-EXPORT_SYMBOL(bitmap_update_sb);
+EXPORT_SYMBOL(md_bitmap_update_sb);
 
 /* print out the bitmap file superblock */
-void bitmap_print_sb(struct bitmap *bitmap)
+void md_bitmap_print_sb(struct bitmap *bitmap)
 {
 	bitmap_super_t *sb;
 
@@ -518,7 +518,7 @@ void bitmap_print_sb(struct bitmap *bitmap)
  *
  * Returns: 0 on success, -Exxx on error
  */
-static int bitmap_new_disk_sb(struct bitmap *bitmap)
+static int md_bitmap_new_disk_sb(struct bitmap *bitmap)
 {
 	bitmap_super_t *sb;
 	unsigned long chunksize, daemon_sleep, write_behind;
@@ -577,7 +577,7 @@ static int bitmap_new_disk_sb(struct bitmap *bitmap)
 }
 
 /* read the superblock from the bitmap file and initialize some bitmap fields */
-static int bitmap_read_sb(struct bitmap *bitmap)
+static int md_bitmap_read_sb(struct bitmap *bitmap)
 {
 	char *reason = NULL;
 	bitmap_super_t *sb;
@@ -727,7 +727,7 @@ out_no_sb:
 	    bitmap->mddev->bitmap_info.space > sectors_reserved)
 		bitmap->mddev->bitmap_info.space = sectors_reserved;
 	if (err) {
-		bitmap_print_sb(bitmap);
+		md_bitmap_print_sb(bitmap);
 		if (bitmap->cluster_slot < 0)
 			md_cluster_stop(bitmap->mddev);
 	}
@@ -774,9 +774,9 @@ static inline struct page *filemap_get_page(struct bitmap_storage *store,
 	return store->filemap[file_page_index(store, chunk)];
 }
 
-static int bitmap_storage_alloc(struct bitmap_storage *store,
-				unsigned long chunks, int with_super,
-				int slot_number)
+static int md_bitmap_storage_alloc(struct bitmap_storage *store,
+				   unsigned long chunks, int with_super,
+				   int slot_number)
 {
 	int pnum, offset = 0;
 	unsigned long num_pages;
@@ -830,7 +830,7 @@ static int bitmap_storage_alloc(struct bitmap_storage *store,
 	return 0;
 }
 
-static void bitmap_file_unmap(struct bitmap_storage *store)
+static void md_bitmap_file_unmap(struct bitmap_storage *store)
 {
 	struct page **map, *sb_page;
 	int pages;
@@ -862,12 +862,12 @@ static void bitmap_file_unmap(struct bitmap_storage *store)
  * then it is no longer reliable, so we stop using it and we mark the file
  * as failed in the superblock
  */
-static void bitmap_file_kick(struct bitmap *bitmap)
+static void md_bitmap_file_kick(struct bitmap *bitmap)
 {
 	char *path, *ptr = NULL;
 
 	if (!test_and_set_bit(BITMAP_STALE, &bitmap->flags)) {
-		bitmap_update_sb(bitmap);
+		md_bitmap_update_sb(bitmap);
 
 		if (bitmap->storage.file) {
 			path = kmalloc(PAGE_SIZE, GFP_KERNEL);
@@ -923,7 +923,7 @@ static inline int test_and_clear_page_attr(struct bitmap *bitmap, int pnum,
  * we set the bit immediately, then we record the page number so that
  * when an unplug occurs, we can flush the dirty pages out to disk
  */
-static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
+static void md_bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
 {
 	unsigned long bit;
 	struct page *page;
@@ -952,7 +952,7 @@ static void bitmap_file_set_bit(struct bitmap *bitmap, sector_t block)
 	set_page_attr(bitmap, page->index - node_offset, BITMAP_PAGE_DIRTY);
 }
 
-static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
+static void md_bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
 {
 	unsigned long bit;
 	struct page *page;
@@ -980,7 +980,7 @@ static void bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block)
 	}
 }
 
-static int bitmap_file_test_bit(struct bitmap *bitmap, sector_t block)
+static int md_bitmap_file_test_bit(struct bitmap *bitmap, sector_t block)
 {
 	unsigned long bit;
 	struct page *page;
@@ -1005,7 +1005,7 @@ static int bitmap_file_test_bit(struct bitmap *bitmap, sector_t block)
 /* this gets called when the md device is ready to unplug its underlying
  * (slave) device queues -- before we let any writes go down, we need to
  * sync the dirty pages of the bitmap file to disk */
-void bitmap_unplug(struct bitmap *bitmap)
+void md_bitmap_unplug(struct bitmap *bitmap)
 {
 	unsigned long i;
 	int dirty, need_write;
@@ -1025,7 +1025,7 @@ void bitmap_unplug(struct bitmap *bitmap)
 						      BITMAP_PAGE_NEEDWRITE);
 		if (dirty || need_write) {
 			if (!writing) {
-				bitmap_wait_writes(bitmap);
+				md_bitmap_wait_writes(bitmap);
 				if (bitmap->mddev->queue)
 					blk_add_trace_msg(bitmap->mddev->queue,
 							  "md bitmap_unplug");
@@ -1036,14 +1036,14 @@ void bitmap_unplug(struct bitmap *bitmap)
 		}
 	}
 	if (writing)
-		bitmap_wait_writes(bitmap);
+		md_bitmap_wait_writes(bitmap);
 
 	if (test_bit(BITMAP_WRITE_ERROR, &bitmap->flags))
-		bitmap_file_kick(bitmap);
+		md_bitmap_file_kick(bitmap);
 }
-EXPORT_SYMBOL(bitmap_unplug);
+EXPORT_SYMBOL(md_bitmap_unplug);
 
-static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed);
+static void md_bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed);
 /* * bitmap_init_from_disk -- called at bitmap_create time to initialize
  * the in-memory bitmap from the on-disk bitmap -- also, sets up the
  * memory mapping of the bitmap file
@@ -1055,7 +1055,7 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int n
  * We ignore all bits for sectors that end earlier than 'start'.
  * This is used when reading an out-of-date bitmap...
  */
-static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
+static int md_bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
 {
 	unsigned long i, chunks, index, oldindex, bit, node_offset = 0;
 	struct page *page = NULL;
@@ -1078,9 +1078,9 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
 			/* if the disk bit is set, set the memory bit */
 			int needed = ((sector_t)(i+1) << (bitmap->counts.chunkshift)
 				      >= start);
-			bitmap_set_memory_bits(bitmap,
-					       (sector_t)i << bitmap->counts.chunkshift,
-					       needed);
+			md_bitmap_set_memory_bits(bitmap,
+						  (sector_t)i << bitmap->counts.chunkshift,
+						  needed);
 		}
 		return 0;
 	}
@@ -1159,9 +1159,9 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
 			/* if the disk bit is set, set the memory bit */
 			int needed = ((sector_t)(i+1) << bitmap->counts.chunkshift
 				      >= start);
-			bitmap_set_memory_bits(bitmap,
-					       (sector_t)i << bitmap->counts.chunkshift,
-					       needed);
+			md_bitmap_set_memory_bits(bitmap,
+						  (sector_t)i << bitmap->counts.chunkshift,
+						  needed);
 			bit_cnt++;
 		}
 		offset = 0;
@@ -1179,7 +1179,7 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
 	return ret;
 }
 
-void bitmap_write_all(struct bitmap *bitmap)
+void md_bitmap_write_all(struct bitmap *bitmap)
 {
 	/* We don't actually write all bitmap blocks here,
 	 * just flag them as needing to be written
@@ -1198,16 +1198,16 @@ void bitmap_write_all(struct bitmap *bitmap)
 	bitmap->allclean = 0;
 }
 
-static void bitmap_count_page(struct bitmap_counts *bitmap,
-			      sector_t offset, int inc)
+static void md_bitmap_count_page(struct bitmap_counts *bitmap,
+				 sector_t offset, int inc)
 {
 	sector_t chunk = offset >> bitmap->chunkshift;
 	unsigned long page = chunk >> PAGE_COUNTER_SHIFT;
 	bitmap->bp[page].count += inc;
-	bitmap_checkfree(bitmap, page);
+	md_bitmap_checkfree(bitmap, page);
 }
 
-static void bitmap_set_pending(struct bitmap_counts *bitmap, sector_t offset)
+static void md_bitmap_set_pending(struct bitmap_counts *bitmap, sector_t offset)
 {
 	sector_t chunk = offset >> bitmap->chunkshift;
 	unsigned long page = chunk >> PAGE_COUNTER_SHIFT;
@@ -1217,16 +1217,16 @@ static void bitmap_set_pending(struct bitmap_counts *bitmap, sector_t offset)
 		bp->pending = 1;
 }
 
-static bitmap_counter_t *bitmap_get_counter(struct bitmap_counts *bitmap,
-					    sector_t offset, sector_t *blocks,
-					    int create);
+static bitmap_counter_t *md_bitmap_get_counter(struct bitmap_counts *bitmap,
+					       sector_t offset, sector_t *blocks,
+					       int create);
 
 /*
  * bitmap daemon -- periodically wakes up to clean bits and flush pages
  *			out to disk
  */
 
-void bitmap_daemon_work(struct mddev *mddev)
+void md_bitmap_daemon_work(struct mddev *mddev)
 {
 	struct bitmap *bitmap;
 	unsigned long j;
@@ -1301,10 +1301,8 @@ void bitmap_daemon_work(struct mddev *mddev)
 			}
 			counts->bp[j >> PAGE_COUNTER_SHIFT].pending = 0;
 		}
-		bmc = bitmap_get_counter(counts,
-					 block,
-					 &blocks, 0);
 
+		bmc = md_bitmap_get_counter(counts, block, &blocks, 0);
 		if (!bmc) {
 			j |= PAGE_COUNTER_MASK;
 			continue;
@@ -1312,17 +1310,17 @@ void bitmap_daemon_work(struct mddev *mddev)
 		if (*bmc == 1 && !bitmap->need_sync) {
 			/* We can clear the bit */
 			*bmc = 0;
-			bitmap_count_page(counts, block, -1);
-			bitmap_file_clear_bit(bitmap, block);
+			md_bitmap_count_page(counts, block, -1);
+			md_bitmap_file_clear_bit(bitmap, block);
 		} else if (*bmc && *bmc <= 2) {
 			*bmc = 1;
-			bitmap_set_pending(counts, block);
+			md_bitmap_set_pending(counts, block);
 			bitmap->allclean = 0;
 		}
 	}
 	spin_unlock_irq(&counts->lock);
 
-	bitmap_wait_writes(bitmap);
+	md_bitmap_wait_writes(bitmap);
 	/* Now start writeout on any page in NEEDWRITE that isn't DIRTY.
 	 * DIRTY pages need to be written by bitmap_unplug so it can wait
 	 * for them.
@@ -1352,9 +1350,9 @@ void bitmap_daemon_work(struct mddev *mddev)
 	mutex_unlock(&mddev->bitmap_info.mutex);
 }
 
-static bitmap_counter_t *bitmap_get_counter(struct bitmap_counts *bitmap,
-					    sector_t offset, sector_t *blocks,
-					    int create)
+static bitmap_counter_t *md_bitmap_get_counter(struct bitmap_counts *bitmap,
+					       sector_t offset, sector_t *blocks,
+					       int create)
 __releases(bitmap->lock)
 __acquires(bitmap->lock)
 {
@@ -1368,7 +1366,7 @@ __acquires(bitmap->lock)
 	sector_t csize;
 	int err;
 
-	err = bitmap_checkpage(bitmap, page, create, 0);
+	err = md_bitmap_checkpage(bitmap, page, create, 0);
 
 	if (bitmap->bp[page].hijacked ||
 	    bitmap->bp[page].map == NULL)
@@ -1394,7 +1392,7 @@ __acquires(bitmap->lock)
 			&(bitmap->bp[page].map[pageoff]);
 }
 
-int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors, int behind)
+int md_bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors, int behind)
 {
 	if (!bitmap)
 		return 0;
@@ -1415,7 +1413,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 		bitmap_counter_t *bmc;
 
 		spin_lock_irq(&bitmap->counts.lock);
-		bmc = bitmap_get_counter(&bitmap->counts, offset, &blocks, 1);
+		bmc = md_bitmap_get_counter(&bitmap->counts, offset, &blocks, 1);
 		if (!bmc) {
 			spin_unlock_irq(&bitmap->counts.lock);
 			return 0;
@@ -1437,8 +1435,8 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 
 		switch (*bmc) {
 		case 0:
-			bitmap_file_set_bit(bitmap, offset);
-			bitmap_count_page(&bitmap->counts, offset, 1);
+			md_bitmap_file_set_bit(bitmap, offset);
+			md_bitmap_count_page(&bitmap->counts, offset, 1);
 			/* fall through */
 		case 1:
 			*bmc = 2;
@@ -1456,10 +1454,10 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
 	}
 	return 0;
 }
-EXPORT_SYMBOL(bitmap_startwrite);
+EXPORT_SYMBOL(md_bitmap_startwrite);
 
-void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long sectors,
-		     int success, int behind)
+void md_bitmap_endwrite(struct bitmap *bitmap, sector_t offset,
+			unsigned long sectors, int success, int behind)
 {
 	if (!bitmap)
 		return;
@@ -1477,7 +1475,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
 		bitmap_counter_t *bmc;
 
 		spin_lock_irqsave(&bitmap->counts.lock, flags);
-		bmc = bitmap_get_counter(&bitmap->counts, offset, &blocks, 0);
+		bmc = md_bitmap_get_counter(&bitmap->counts, offset, &blocks, 0);
 		if (!bmc) {
 			spin_unlock_irqrestore(&bitmap->counts.lock, flags);
 			return;
@@ -1498,7 +1496,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
 
 		(*bmc)--;
 		if (*bmc <= 2) {
-			bitmap_set_pending(&bitmap->counts, offset);
+			md_bitmap_set_pending(&bitmap->counts, offset);
 			bitmap->allclean = 0;
 		}
 		spin_unlock_irqrestore(&bitmap->counts.lock, flags);
@@ -1509,7 +1507,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset, unsigned long secto
 			sectors = 0;
 	}
 }
-EXPORT_SYMBOL(bitmap_endwrite);
+EXPORT_SYMBOL(md_bitmap_endwrite);
 
 static int __bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks,
 			       int degraded)
@@ -1521,7 +1519,7 @@ static int __bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t
 		return 1; /* always resync if no bitmap */
 	}
 	spin_lock_irq(&bitmap->counts.lock);
-	bmc = bitmap_get_counter(&bitmap->counts, offset, blocks, 0);
+	bmc = md_bitmap_get_counter(&bitmap->counts, offset, blocks, 0);
 	rv = 0;
 	if (bmc) {
 		/* locked */
@@ -1539,8 +1537,8 @@ static int __bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t
 	return rv;
 }
 
-int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks,
-		      int degraded)
+int md_bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks,
+			 int degraded)
 {
 	/* bitmap_start_sync must always report on multiples of whole
 	 * pages, otherwise resync (which is very PAGE_SIZE based) will
@@ -1561,9 +1559,9 @@ int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks,
 	}
 	return rv;
 }
-EXPORT_SYMBOL(bitmap_start_sync);
+EXPORT_SYMBOL(md_bitmap_start_sync);
 
-void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int aborted)
+void md_bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int aborted)
 {
 	bitmap_counter_t *bmc;
 	unsigned long flags;
@@ -1573,7 +1571,7 @@ void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, i
 		return;
 	}
 	spin_lock_irqsave(&bitmap->counts.lock, flags);
-	bmc = bitmap_get_counter(&bitmap->counts, offset, blocks, 0);
+	bmc = md_bitmap_get_counter(&bitmap->counts, offset, blocks, 0);
 	if (bmc == NULL)
 		goto unlock;
 	/* locked */
@@ -1584,7 +1582,7 @@ void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, i
 			*bmc |= NEEDED_MASK;
 		else {
 			if (*bmc <= 2) {
-				bitmap_set_pending(&bitmap->counts, offset);
+				md_bitmap_set_pending(&bitmap->counts, offset);
 				bitmap->allclean = 0;
 			}
 		}
@@ -1592,9 +1590,9 @@ void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, i
  unlock:
 	spin_unlock_irqrestore(&bitmap->counts.lock, flags);
 }
-EXPORT_SYMBOL(bitmap_end_sync);
+EXPORT_SYMBOL(md_bitmap_end_sync);
 
-void bitmap_close_sync(struct bitmap *bitmap)
+void md_bitmap_close_sync(struct bitmap *bitmap)
 {
 	/* Sync has finished, and any bitmap chunks that weren't synced
 	 * properly have been aborted.  It remains to us to clear the
@@ -1605,13 +1603,13 @@ void bitmap_close_sync(struct bitmap *bitmap)
 	if (!bitmap)
 		return;
 	while (sector < bitmap->mddev->resync_max_sectors) {
-		bitmap_end_sync(bitmap, sector, &blocks, 0);
+		md_bitmap_end_sync(bitmap, sector, &blocks, 0);
 		sector += blocks;
 	}
 }
-EXPORT_SYMBOL(bitmap_close_sync);
+EXPORT_SYMBOL(md_bitmap_close_sync);
 
-void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force)
+void md_bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force)
 {
 	sector_t s = 0;
 	sector_t blocks;
@@ -1633,15 +1631,15 @@ void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force)
 	sector &= ~((1ULL << bitmap->counts.chunkshift) - 1);
 	s = 0;
 	while (s < sector && s < bitmap->mddev->resync_max_sectors) {
-		bitmap_end_sync(bitmap, s, &blocks, 0);
+		md_bitmap_end_sync(bitmap, s, &blocks, 0);
 		s += blocks;
 	}
 	bitmap->last_end_sync = jiffies;
 	sysfs_notify(&bitmap->mddev->kobj, NULL, "sync_completed");
 }
-EXPORT_SYMBOL(bitmap_cond_end_sync);
+EXPORT_SYMBOL(md_bitmap_cond_end_sync);
 
-void bitmap_sync_with_cluster(struct mddev *mddev,
+void md_bitmap_sync_with_cluster(struct mddev *mddev,
 			      sector_t old_lo, sector_t old_hi,
 			      sector_t new_lo, sector_t new_hi)
 {
@@ -1649,20 +1647,20 @@ void bitmap_sync_with_cluster(struct mddev *mddev,
 	sector_t sector, blocks = 0;
 
 	for (sector = old_lo; sector < new_lo; ) {
-		bitmap_end_sync(bitmap, sector, &blocks, 0);
+		md_bitmap_end_sync(bitmap, sector, &blocks, 0);
 		sector += blocks;
 	}
 	WARN((blocks > new_lo) && old_lo, "alignment is not correct for lo\n");
 
 	for (sector = old_hi; sector < new_hi; ) {
-		bitmap_start_sync(bitmap, sector, &blocks, 0);
+		md_bitmap_start_sync(bitmap, sector, &blocks, 0);
 		sector += blocks;
 	}
 	WARN((blocks > new_hi) && old_hi, "alignment is not correct for hi\n");
 }
-EXPORT_SYMBOL(bitmap_sync_with_cluster);
+EXPORT_SYMBOL(md_bitmap_sync_with_cluster);
 
-static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed)
+static void md_bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed)
 {
 	/* For each chunk covered by any of these sectors, set the
 	 * counter to 2 and possibly set resync_needed.  They should all
@@ -1672,15 +1670,15 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int n
 	sector_t secs;
 	bitmap_counter_t *bmc;
 	spin_lock_irq(&bitmap->counts.lock);
-	bmc = bitmap_get_counter(&bitmap->counts, offset, &secs, 1);
+	bmc = md_bitmap_get_counter(&bitmap->counts, offset, &secs, 1);
 	if (!bmc) {
 		spin_unlock_irq(&bitmap->counts.lock);
 		return;
 	}
 	if (!*bmc) {
 		*bmc = 2;
-		bitmap_count_page(&bitmap->counts, offset, 1);
-		bitmap_set_pending(&bitmap->counts, offset);
+		md_bitmap_count_page(&bitmap->counts, offset, 1);
+		md_bitmap_set_pending(&bitmap->counts, offset);
 		bitmap->allclean = 0;
 	}
 	if (needed)
@@ -1689,14 +1687,14 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int n
 }
 
 /* dirty the memory and file bits for bitmap chunks "s" to "e" */
-void bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e)
+void md_bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e)
 {
 	unsigned long chunk;
 
 	for (chunk = s; chunk <= e; chunk++) {
 		sector_t sec = (sector_t)chunk << bitmap->counts.chunkshift;
-		bitmap_set_memory_bits(bitmap, sec, 1);
-		bitmap_file_set_bit(bitmap, sec);
+		md_bitmap_set_memory_bits(bitmap, sec, 1);
+		md_bitmap_file_set_bit(bitmap, sec);
 		if (sec < bitmap->mddev->recovery_cp)
 			/* We are asserting that the array is dirty,
 			 * so move the recovery_cp address back so
@@ -1709,7 +1707,7 @@ void bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e)
 /*
  * flush out any pending updates
  */
-void bitmap_flush(struct mddev *mddev)
+void md_bitmap_flush(struct mddev *mddev)
 {
 	struct bitmap *bitmap = mddev->bitmap;
 	long sleep;
@@ -1722,18 +1720,18 @@ void bitmap_flush(struct mddev *mddev)
 	 */
 	sleep = mddev->bitmap_info.daemon_sleep * 2;
 	bitmap->daemon_lastrun -= sleep;
-	bitmap_daemon_work(mddev);
+	md_bitmap_daemon_work(mddev);
 	bitmap->daemon_lastrun -= sleep;
-	bitmap_daemon_work(mddev);
+	md_bitmap_daemon_work(mddev);
 	bitmap->daemon_lastrun -= sleep;
-	bitmap_daemon_work(mddev);
-	bitmap_update_sb(bitmap);
+	md_bitmap_daemon_work(mddev);
+	md_bitmap_update_sb(bitmap);
 }
 
 /*
  * free memory that was allocated
  */
-void bitmap_free(struct bitmap *bitmap)
+void md_bitmap_free(struct bitmap *bitmap)
 {
 	unsigned long k, pages;
 	struct bitmap_page *bp;
@@ -1753,7 +1751,7 @@ void bitmap_free(struct bitmap *bitmap)
 		   atomic_read(&bitmap->pending_writes) == 0);
 
 	/* release the bitmap file  */
-	bitmap_file_unmap(&bitmap->storage);
+	md_bitmap_file_unmap(&bitmap->storage);
 
 	bp = bitmap->counts.bp;
 	pages = bitmap->counts.pages;
@@ -1767,9 +1765,9 @@ void bitmap_free(struct bitmap *bitmap)
 	kfree(bp);
 	kfree(bitmap);
 }
-EXPORT_SYMBOL(bitmap_free);
+EXPORT_SYMBOL(md_bitmap_free);
 
-void bitmap_wait_behind_writes(struct mddev *mddev)
+void md_bitmap_wait_behind_writes(struct mddev *mddev)
 {
 	struct bitmap *bitmap = mddev->bitmap;
 
@@ -1783,14 +1781,14 @@ void bitmap_wait_behind_writes(struct mddev *mddev)
 	}
 }
 
-void bitmap_destroy(struct mddev *mddev)
+void md_bitmap_destroy(struct mddev *mddev)
 {
 	struct bitmap *bitmap = mddev->bitmap;
 
 	if (!bitmap) /* there was no bitmap */
 		return;
 
-	bitmap_wait_behind_writes(mddev);
+	md_bitmap_wait_behind_writes(mddev);
 
 	mutex_lock(&mddev->bitmap_info.mutex);
 	spin_lock(&mddev->lock);
@@ -1800,7 +1798,7 @@ void bitmap_destroy(struct mddev *mddev)
 	if (mddev->thread)
 		mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;
 
-	bitmap_free(bitmap);
+	md_bitmap_free(bitmap);
 }
 
 /*
@@ -1808,7 +1806,7 @@ void bitmap_destroy(struct mddev *mddev)
  * if this returns an error, bitmap_destroy must be called to do clean up
  * once mddev->bitmap is set
  */
-struct bitmap *bitmap_create(struct mddev *mddev, int slot)
+struct bitmap *md_bitmap_create(struct mddev *mddev, int slot)
 {
 	struct bitmap *bitmap;
 	sector_t blocks = mddev->resync_max_sectors;
@@ -1863,9 +1861,9 @@ struct bitmap *bitmap_create(struct mddev *mddev, int slot)
 		 * instructing us to create a new on-disk bitmap instance.
 		 */
 		if (test_and_clear_bit(MD_ARRAY_FIRST_USE, &mddev->flags))
-			err = bitmap_new_disk_sb(bitmap);
+			err = md_bitmap_new_disk_sb(bitmap);
 		else
-			err = bitmap_read_sb(bitmap);
+			err = md_bitmap_read_sb(bitmap);
 	} else {
 		err = 0;
 		if (mddev->bitmap_info.chunksize == 0 ||
@@ -1878,7 +1876,7 @@ struct bitmap *bitmap_create(struct mddev *mddev, int slot)
 		goto error;
 
 	bitmap->daemon_lastrun = jiffies;
-	err = bitmap_resize(bitmap, blocks, mddev->bitmap_info.chunksize, 1);
+	err = md_bitmap_resize(bitmap, blocks, mddev->bitmap_info.chunksize, 1);
 	if (err)
 		goto error;
 
@@ -1891,11 +1889,11 @@ struct bitmap *bitmap_create(struct mddev *mddev, int slot)
 
 	return bitmap;
  error:
-	bitmap_free(bitmap);
+	md_bitmap_free(bitmap);
 	return ERR_PTR(err);
 }
 
-int bitmap_load(struct mddev *mddev)
+int md_bitmap_load(struct mddev *mddev)
 {
 	int err = 0;
 	sector_t start = 0;
@@ -1915,10 +1913,10 @@ int bitmap_load(struct mddev *mddev)
 	 */
 	while (sector < mddev->resync_max_sectors) {
 		sector_t blocks;
-		bitmap_start_sync(bitmap, sector, &blocks, 0);
+		md_bitmap_start_sync(bitmap, sector, &blocks, 0);
 		sector += blocks;
 	}
-	bitmap_close_sync(bitmap);
+	md_bitmap_close_sync(bitmap);
 
 	if (mddev->degraded == 0
 	    || bitmap->events_cleared == mddev->events)
@@ -1927,7 +1925,7 @@ int bitmap_load(struct mddev *mddev)
 		start = mddev->recovery_cp;
 
 	mutex_lock(&mddev->bitmap_info.mutex);
-	err = bitmap_init_from_disk(bitmap, start);
+	err = md_bitmap_init_from_disk(bitmap, start);
 	mutex_unlock(&mddev->bitmap_info.mutex);
 
 	if (err)
@@ -1940,29 +1938,29 @@ int bitmap_load(struct mddev *mddev)
 	mddev->thread->timeout = mddev->bitmap_info.daemon_sleep;
 	md_wakeup_thread(mddev->thread);
 
-	bitmap_update_sb(bitmap);
+	md_bitmap_update_sb(bitmap);
 
 	if (test_bit(BITMAP_WRITE_ERROR, &bitmap->flags))
 		err = -EIO;
 out:
 	return err;
 }
-EXPORT_SYMBOL_GPL(bitmap_load);
+EXPORT_SYMBOL_GPL(md_bitmap_load);
 
 struct bitmap *get_bitmap_from_slot(struct mddev *mddev, int slot)
 {
 	int rv = 0;
 	struct bitmap *bitmap;
 
-	bitmap = bitmap_create(mddev, slot);
+	bitmap = md_bitmap_create(mddev, slot);
 	if (IS_ERR(bitmap)) {
 		rv = PTR_ERR(bitmap);
 		return ERR_PTR(rv);
 	}
 
-	rv = bitmap_init_from_disk(bitmap, 0);
+	rv = md_bitmap_init_from_disk(bitmap, 0);
 	if (rv) {
-		bitmap_free(bitmap);
+		md_bitmap_free(bitmap);
 		return ERR_PTR(rv);
 	}
 
@@ -1973,7 +1971,7 @@ EXPORT_SYMBOL(get_bitmap_from_slot);
 /* Loads the bitmap associated with slot and copies the resync information
  * to our bitmap
  */
-int bitmap_copy_from_slot(struct mddev *mddev, int slot,
+int md_bitmap_copy_from_slot(struct mddev *mddev, int slot,
 		sector_t *low, sector_t *high, bool clear_bits)
 {
 	int rv = 0, i, j;
@@ -1990,35 +1988,35 @@ int bitmap_copy_from_slot(struct mddev *mddev, int slot,
 	counts = &bitmap->counts;
 	for (j = 0; j < counts->chunks; j++) {
 		block = (sector_t)j << counts->chunkshift;
-		if (bitmap_file_test_bit(bitmap, block)) {
+		if (md_bitmap_file_test_bit(bitmap, block)) {
 			if (!lo)
 				lo = block;
 			hi = block;
-			bitmap_file_clear_bit(bitmap, block);
-			bitmap_set_memory_bits(mddev->bitmap, block, 1);
-			bitmap_file_set_bit(mddev->bitmap, block);
+			md_bitmap_file_clear_bit(bitmap, block);
+			md_bitmap_set_memory_bits(mddev->bitmap, block, 1);
+			md_bitmap_file_set_bit(mddev->bitmap, block);
 		}
 	}
 
 	if (clear_bits) {
-		bitmap_update_sb(bitmap);
+		md_bitmap_update_sb(bitmap);
 		/* BITMAP_PAGE_PENDING is set, but bitmap_unplug needs
 		 * BITMAP_PAGE_DIRTY or _NEEDWRITE to write ... */
 		for (i = 0; i < bitmap->storage.file_pages; i++)
 			if (test_page_attr(bitmap, i, BITMAP_PAGE_PENDING))
 				set_page_attr(bitmap, i, BITMAP_PAGE_NEEDWRITE);
-		bitmap_unplug(bitmap);
+		md_bitmap_unplug(bitmap);
 	}
-	bitmap_unplug(mddev->bitmap);
+	md_bitmap_unplug(mddev->bitmap);
 	*low = lo;
 	*high = hi;
 
 	return rv;
 }
-EXPORT_SYMBOL_GPL(bitmap_copy_from_slot);
+EXPORT_SYMBOL_GPL(md_bitmap_copy_from_slot);
 
 
-void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
+void md_bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
 {
 	unsigned long chunk_kb;
 	struct bitmap_counts *counts;
@@ -2045,7 +2043,7 @@ void bitmap_status(struct seq_file *seq, struct bitmap *bitmap)
 	seq_printf(seq, "\n");
 }
 
-int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
+int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 		  int chunksize, int init)
 {
 	/* If chunk_size is 0, choose an appropriate chunk size.
@@ -2106,12 +2104,12 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 	chunks = DIV_ROUND_UP_SECTOR_T(blocks, 1 << chunkshift);
 	memset(&store, 0, sizeof(store));
 	if (bitmap->mddev->bitmap_info.offset || bitmap->mddev->bitmap_info.file)
-		ret = bitmap_storage_alloc(&store, chunks,
-					   !bitmap->mddev->bitmap_info.external,
-					   mddev_is_clustered(bitmap->mddev)
-					   ? bitmap->cluster_slot : 0);
+		ret = md_bitmap_storage_alloc(&store, chunks,
+					      !bitmap->mddev->bitmap_info.external,
+					      mddev_is_clustered(bitmap->mddev)
+					      ? bitmap->cluster_slot : 0);
 	if (ret) {
-		bitmap_file_unmap(&store);
+		md_bitmap_file_unmap(&store);
 		goto err;
 	}
 
@@ -2120,7 +2118,7 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 	new_bp = kzalloc(pages * sizeof(*new_bp), GFP_KERNEL);
 	ret = -ENOMEM;
 	if (!new_bp) {
-		bitmap_file_unmap(&store);
+		md_bitmap_file_unmap(&store);
 		goto err;
 	}
 
@@ -2134,7 +2132,7 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 		memcpy(page_address(store.sb_page),
 		       page_address(bitmap->storage.sb_page),
 		       sizeof(bitmap_super_t));
-	bitmap_file_unmap(&bitmap->storage);
+	md_bitmap_file_unmap(&bitmap->storage);
 	bitmap->storage = store;
 
 	old_counts = bitmap->counts;
@@ -2154,7 +2152,7 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 	if (mddev_is_clustered(bitmap->mddev)) {
 		unsigned long page;
 		for (page = 0; page < pages; page++) {
-			ret = bitmap_checkpage(&bitmap->counts, page, 1, 1);
+			ret = md_bitmap_checkpage(&bitmap->counts, page, 1, 1);
 			if (ret) {
 				unsigned long k;
 
@@ -2184,27 +2182,23 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 		bitmap_counter_t *bmc_old, *bmc_new;
 		int set;
 
-		bmc_old = bitmap_get_counter(&old_counts, block,
-					     &old_blocks, 0);
+		bmc_old = md_bitmap_get_counter(&old_counts, block, &old_blocks, 0);
 		set = bmc_old && NEEDED(*bmc_old);
 
 		if (set) {
-			bmc_new = bitmap_get_counter(&bitmap->counts, block,
-						     &new_blocks, 1);
+			bmc_new = md_bitmap_get_counter(&bitmap->counts, block, &new_blocks, 1);
 			if (*bmc_new == 0) {
 				/* need to set on-disk bits too. */
 				sector_t end = block + new_blocks;
 				sector_t start = block >> chunkshift;
 				start <<= chunkshift;
 				while (start < end) {
-					bitmap_file_set_bit(bitmap, block);
+					md_bitmap_file_set_bit(bitmap, block);
 					start += 1 << chunkshift;
 				}
 				*bmc_new = 2;
-				bitmap_count_page(&bitmap->counts,
-						  block, 1);
-				bitmap_set_pending(&bitmap->counts,
-						   block);
+				md_bitmap_count_page(&bitmap->counts, block, 1);
+				md_bitmap_set_pending(&bitmap->counts, block);
 			}
 			*bmc_new |= NEEDED_MASK;
 			if (new_blocks < old_blocks)
@@ -2225,18 +2219,15 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 		int i;
 		while (block < (chunks << chunkshift)) {
 			bitmap_counter_t *bmc;
-			bmc = bitmap_get_counter(&bitmap->counts, block,
-						 &new_blocks, 1);
+			bmc = md_bitmap_get_counter(&bitmap->counts, block, &new_blocks, 1);
 			if (bmc) {
 				/* new space.  It needs to be resynced, so
 				 * we set NEEDED_MASK.
 				 */
 				if (*bmc == 0) {
 					*bmc = NEEDED_MASK | 2;
-					bitmap_count_page(&bitmap->counts,
-							  block, 1);
-					bitmap_set_pending(&bitmap->counts,
-							   block);
+					md_bitmap_count_page(&bitmap->counts, block, 1);
+					md_bitmap_set_pending(&bitmap->counts, block);
 				}
 			}
 			block += new_blocks;
@@ -2247,14 +2238,14 @@ int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
 	spin_unlock_irq(&bitmap->counts.lock);
 
 	if (!init) {
-		bitmap_unplug(bitmap);
+		md_bitmap_unplug(bitmap);
 		bitmap->mddev->pers->quiesce(bitmap->mddev, 0);
 	}
 	ret = 0;
 err:
 	return ret;
 }
-EXPORT_SYMBOL_GPL(bitmap_resize);
+EXPORT_SYMBOL_GPL(md_bitmap_resize);
 
 static ssize_t
 location_show(struct mddev *mddev, char *page)
@@ -2298,7 +2289,7 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
 		}
 		if (mddev->pers) {
 			mddev->pers->quiesce(mddev, 1);
-			bitmap_destroy(mddev);
+			md_bitmap_destroy(mddev);
 			mddev->pers->quiesce(mddev, 0);
 		}
 		mddev->bitmap_info.offset = 0;
@@ -2337,18 +2328,18 @@ location_store(struct mddev *mddev, const char *buf, size_t len)
 			if (mddev->pers) {
 				struct bitmap *bitmap;
 				mddev->pers->quiesce(mddev, 1);
-				bitmap = bitmap_create(mddev, -1);
+				bitmap = md_bitmap_create(mddev, -1);
 				if (IS_ERR(bitmap))
 					rv = PTR_ERR(bitmap);
 				else {
 					mddev->bitmap = bitmap;
-					rv = bitmap_load(mddev);
+					rv = md_bitmap_load(mddev);
 					if (rv)
 						mddev->bitmap_info.offset = 0;
 				}
 				mddev->pers->quiesce(mddev, 0);
 				if (rv) {
-					bitmap_destroy(mddev);
+					md_bitmap_destroy(mddev);
 					goto out;
 				}
 			}
diff --git a/drivers/md/md-bitmap.h b/drivers/md/md-bitmap.h
index 5df35ca90f58..cfd7395de8fd 100644
--- a/drivers/md/md-bitmap.h
+++ b/drivers/md/md-bitmap.h
@@ -236,43 +236,43 @@ struct bitmap {
 /* the bitmap API */
 
 /* these are used only by md/bitmap */
-struct bitmap *bitmap_create(struct mddev *mddev, int slot);
-int bitmap_load(struct mddev *mddev);
-void bitmap_flush(struct mddev *mddev);
-void bitmap_destroy(struct mddev *mddev);
+struct bitmap *md_bitmap_create(struct mddev *mddev, int slot);
+int md_bitmap_load(struct mddev *mddev);
+void md_bitmap_flush(struct mddev *mddev);
+void md_bitmap_destroy(struct mddev *mddev);
 
-void bitmap_print_sb(struct bitmap *bitmap);
-void bitmap_update_sb(struct bitmap *bitmap);
-void bitmap_status(struct seq_file *seq, struct bitmap *bitmap);
+void md_bitmap_print_sb(struct bitmap *bitmap);
+void md_bitmap_update_sb(struct bitmap *bitmap);
+void md_bitmap_status(struct seq_file *seq, struct bitmap *bitmap);
 
-int  bitmap_setallbits(struct bitmap *bitmap);
-void bitmap_write_all(struct bitmap *bitmap);
+int  md_bitmap_setallbits(struct bitmap *bitmap);
+void md_bitmap_write_all(struct bitmap *bitmap);
 
-void bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e);
+void md_bitmap_dirty_bits(struct bitmap *bitmap, unsigned long s, unsigned long e);
 
 /* these are exported */
-int bitmap_startwrite(struct bitmap *bitmap, sector_t offset,
-			unsigned long sectors, int behind);
-void bitmap_endwrite(struct bitmap *bitmap, sector_t offset,
+int md_bitmap_startwrite(struct bitmap *bitmap, sector_t offset,
+			 unsigned long sectors, int behind);
+void md_bitmap_endwrite(struct bitmap *bitmap, sector_t offset,
 			unsigned long sectors, int success, int behind);
-int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int degraded);
-void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int aborted);
-void bitmap_close_sync(struct bitmap *bitmap);
-void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force);
-void bitmap_sync_with_cluster(struct mddev *mddev,
-			      sector_t old_lo, sector_t old_hi,
-			      sector_t new_lo, sector_t new_hi);
-
-void bitmap_unplug(struct bitmap *bitmap);
-void bitmap_daemon_work(struct mddev *mddev);
-
-int bitmap_resize(struct bitmap *bitmap, sector_t blocks,
-		  int chunksize, int init);
+int md_bitmap_start_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int degraded);
+void md_bitmap_end_sync(struct bitmap *bitmap, sector_t offset, sector_t *blocks, int aborted);
+void md_bitmap_close_sync(struct bitmap *bitmap);
+void md_bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector, bool force);
+void md_bitmap_sync_with_cluster(struct mddev *mddev,
+				 sector_t old_lo, sector_t old_hi,
+				 sector_t new_lo, sector_t new_hi);
+
+void md_bitmap_unplug(struct bitmap *bitmap);
+void md_bitmap_daemon_work(struct mddev *mddev);
+
+int md_bitmap_resize(struct bitmap *bitmap, sector_t blocks,
+		     int chunksize, int init);
 struct bitmap *get_bitmap_from_slot(struct mddev *mddev, int slot);
-int bitmap_copy_from_slot(struct mddev *mddev, int slot,
-				sector_t *lo, sector_t *hi, bool clear_bits);
-void bitmap_free(struct bitmap *bitmap);
-void bitmap_wait_behind_writes(struct mddev *mddev);
+int md_bitmap_copy_from_slot(struct mddev *mddev, int slot,
+			     sector_t *lo, sector_t *hi, bool clear_bits);
+void md_bitmap_free(struct bitmap *bitmap);
+void md_bitmap_wait_behind_writes(struct mddev *mddev);
 #endif
 
 #endif
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c
index 79bfbc840385..fdd357fb21c5 100644
--- a/drivers/md/md-cluster.c
+++ b/drivers/md/md-cluster.c
@@ -326,7 +326,7 @@ static void recover_bitmaps(struct md_thread *thread)
 					str, ret);
 			goto clear_bit;
 		}
-		ret = bitmap_copy_from_slot(mddev, slot, &lo, &hi, true);
+		ret = md_bitmap_copy_from_slot(mddev, slot, &lo, &hi, true);
 		if (ret) {
 			pr_err("md-cluster: Could not copy data from bitmap %d\n", slot);
 			goto clear_bit;
@@ -480,9 +480,7 @@ static void process_suspend_info(struct mddev *mddev,
 	 * resync thread is running in another node,
 	 * so we don't need to do the resync again
 	 * with the same section */
-	bitmap_sync_with_cluster(mddev, cinfo->sync_low,
-					cinfo->sync_hi,
-					lo, hi);
+	md_bitmap_sync_with_cluster(mddev, cinfo->sync_low, cinfo->sync_hi, lo, hi);
 	cinfo->sync_low = lo;
 	cinfo->sync_hi = hi;
 
@@ -829,7 +827,7 @@ static int gather_all_resync_info(struct mddev *mddev, int total_slots)
 		}
 
 		/* Read the disk bitmap sb and check if it needs recovery */
-		ret = bitmap_copy_from_slot(mddev, i, &lo, &hi, false);
+		ret = md_bitmap_copy_from_slot(mddev, i, &lo, &hi, false);
 		if (ret) {
 			pr_warn("md-cluster: Could not gather bitmaps from slot %d", i);
 			lockres_free(bm_lockres);
@@ -1127,13 +1125,13 @@ static int cluster_check_sync_size(struct mddev *mddev)
 		bm_lockres = lockres_init(mddev, str, NULL, 1);
 		if (!bm_lockres) {
 			pr_err("md-cluster: Cannot initialize %s\n", str);
-			bitmap_free(bitmap);
+			md_bitmap_free(bitmap);
 			return -1;
 		}
 		bm_lockres->flags |= DLM_LKF_NOQUEUE;
 		rv = dlm_lock_sync(bm_lockres, DLM_LOCK_PW);
 		if (!rv)
-			bitmap_update_sb(bitmap);
+			md_bitmap_update_sb(bitmap);
 		lockres_free(bm_lockres);
 
 		sb = kmap_atomic(bitmap->storage.sb_page);
@@ -1141,11 +1139,11 @@ static int cluster_check_sync_size(struct mddev *mddev)
 			sync_size = sb->sync_size;
 		else if (sync_size != sb->sync_size) {
 			kunmap_atomic(sb);
-			bitmap_free(bitmap);
+			md_bitmap_free(bitmap);
 			return -1;
 		}
 		kunmap_atomic(sb);
-		bitmap_free(bitmap);
+		md_bitmap_free(bitmap);
 	}
 
 	return (my_sync_size == sync_size) ? 0 : -1;
@@ -1442,7 +1440,7 @@ static int gather_bitmaps(struct md_rdev *rdev)
 	for (sn = 0; sn < mddev->bitmap_info.nodes; sn++) {
 		if (sn == (cinfo->slot_number - 1))
 			continue;
-		err = bitmap_copy_from_slot(mddev, sn, &lo, &hi, false);
+		err = md_bitmap_copy_from_slot(mddev, sn, &lo, &hi, false);
 		if (err) {
 			pr_warn("md-cluster: Could not gather bitmaps from slot %d", sn);
 			goto out;
diff --git a/drivers/md/md.c b/drivers/md/md.c
index c208c01f63a5..edad9f8442e6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2560,7 +2560,7 @@ repeat:
 	if (mddev->queue)
 		blk_add_trace_msg(mddev->queue, "md md_update_sb");
 rewrite:
-	bitmap_update_sb(mddev->bitmap);
+	md_bitmap_update_sb(mddev->bitmap);
 	rdev_for_each(rdev, mddev) {
 		char b[BDEVNAME_SIZE];
 
@@ -4372,10 +4372,10 @@ bitmap_store(struct mddev *mddev, const char *buf, size_t len)
 			if (buf == end) break;
 		}
 		if (*end && !isspace(*end)) break;
-		bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk);
+		md_bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk);
 		buf = skip_spaces(end);
 	}
-	bitmap_unplug(mddev->bitmap); /* flush the bits to disk */
+	md_bitmap_unplug(mddev->bitmap); /* flush the bits to disk */
 out:
 	mddev_unlock(mddev);
 	return len;
@@ -5588,7 +5588,7 @@ int md_run(struct mddev *mddev)
 	    (mddev->bitmap_info.file || mddev->bitmap_info.offset)) {
 		struct bitmap *bitmap;
 
-		bitmap = bitmap_create(mddev, -1);
+		bitmap = md_bitmap_create(mddev, -1);
 		if (IS_ERR(bitmap)) {
 			err = PTR_ERR(bitmap);
 			pr_warn("%s: failed to create bitmap (%d)\n",
@@ -5603,7 +5603,7 @@ int md_run(struct mddev *mddev)
 			pers->free(mddev, mddev->private);
 		mddev->private = NULL;
 		module_put(pers->owner);
-		bitmap_destroy(mddev);
+		md_bitmap_destroy(mddev);
 		goto abort;
 	}
 	if (mddev->queue) {
@@ -5688,9 +5688,9 @@ static int do_md_run(struct mddev *mddev)
 	err = md_run(mddev);
 	if (err)
 		goto out;
-	err = bitmap_load(mddev);
+	err = md_bitmap_load(mddev);
 	if (err) {
-		bitmap_destroy(mddev);
+		md_bitmap_destroy(mddev);
 		goto out;
 	}
 
@@ -5832,7 +5832,7 @@ static void __md_stop_writes(struct mddev *mddev)
 		mddev->pers->quiesce(mddev, 1);
 		mddev->pers->quiesce(mddev, 0);
 	}
-	bitmap_flush(mddev);
+	md_bitmap_flush(mddev);
 
 	if (mddev->ro == 0 &&
 	    ((!mddev->in_sync && !mddev_is_clustered(mddev)) ||
@@ -5854,7 +5854,7 @@ EXPORT_SYMBOL_GPL(md_stop_writes);
 
 static void mddev_detach(struct mddev *mddev)
 {
-	bitmap_wait_behind_writes(mddev);
+	md_bitmap_wait_behind_writes(mddev);
 	if (mddev->pers && mddev->pers->quiesce) {
 		mddev->pers->quiesce(mddev, 1);
 		mddev->pers->quiesce(mddev, 0);
@@ -5867,7 +5867,7 @@ static void mddev_detach(struct mddev *mddev)
 static void __md_stop(struct mddev *mddev)
 {
 	struct md_personality *pers = mddev->pers;
-	bitmap_destroy(mddev);
+	md_bitmap_destroy(mddev);
 	mddev_detach(mddev);
 	/* Ensure ->event_work is done */
 	flush_workqueue(md_misc_wq);
@@ -6681,21 +6681,21 @@ static int set_bitmap_file(struct mddev *mddev, int fd)
 		if (fd >= 0) {
 			struct bitmap *bitmap;
 
-			bitmap = bitmap_create(mddev, -1);
+			bitmap = md_bitmap_create(mddev, -1);
 			mddev_suspend(mddev);
 			if (!IS_ERR(bitmap)) {
 				mddev->bitmap = bitmap;
-				err = bitmap_load(mddev);
+				err = md_bitmap_load(mddev);
 			} else
 				err = PTR_ERR(bitmap);
 			if (err) {
-				bitmap_destroy(mddev);
+				md_bitmap_destroy(mddev);
 				fd = -1;
 			}
 			mddev_resume(mddev);
 		} else if (fd < 0) {
 			mddev_suspend(mddev);
-			bitmap_destroy(mddev);
+			md_bitmap_destroy(mddev);
 			mddev_resume(mddev);
 		}
 	}
@@ -6981,15 +6981,15 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
 				mddev->bitmap_info.default_offset;
 			mddev->bitmap_info.space =
 				mddev->bitmap_info.default_space;
-			bitmap = bitmap_create(mddev, -1);
+			bitmap = md_bitmap_create(mddev, -1);
 			mddev_suspend(mddev);
 			if (!IS_ERR(bitmap)) {
 				mddev->bitmap = bitmap;
-				rv = bitmap_load(mddev);
+				rv = md_bitmap_load(mddev);
 			} else
 				rv = PTR_ERR(bitmap);
 			if (rv)
-				bitmap_destroy(mddev);
+				md_bitmap_destroy(mddev);
 			mddev_resume(mddev);
 		} else {
 			/* remove the bitmap */
@@ -7014,7 +7014,7 @@ static int update_array_info(struct mddev *mddev, mdu_array_info_t *info)
 				md_cluster_ops->leave(mddev);
 			}
 			mddev_suspend(mddev);
-			bitmap_destroy(mddev);
+			md_bitmap_destroy(mddev);
 			mddev_resume(mddev);
 			mddev->bitmap_info.offset = 0;
 		}
@@ -7877,7 +7877,7 @@ static int md_seq_show(struct seq_file *seq, void *v)
 		} else
 			seq_printf(seq, "\n       ");
 
-		bitmap_status(seq, mddev->bitmap);
+		md_bitmap_status(seq, mddev->bitmap);
 
 		seq_printf(seq, "\n");
 	}
@@ -8748,7 +8748,7 @@ void md_check_recovery(struct mddev *mddev)
 		return;
 
 	if (mddev->bitmap)
-		bitmap_daemon_work(mddev);
+		md_bitmap_daemon_work(mddev);
 
 	if (signal_pending(current)) {
 		if (mddev->pers->sync_request && !mddev->external) {
@@ -8885,7 +8885,7 @@ void md_check_recovery(struct mddev *mddev)
 				 * which has the bitmap stored on all devices.
 				 * So make sure all bitmap pages get written
 				 */
-				bitmap_write_all(mddev->bitmap);
+				md_bitmap_write_all(mddev->bitmap);
 			}
 			INIT_WORK(&mddev->del_work, md_start_sync);
 			queue_work(md_misc_wq, &mddev->del_work);
@@ -9133,7 +9133,7 @@ static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev)
 		if (ret)
 			pr_info("md-cluster: resize failed\n");
 		else
-			bitmap_update_sb(mddev->bitmap);
+			md_bitmap_update_sb(mddev->bitmap);
 	}
 
 	/* Check for change of roles in the active devices */
diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c
index 829b4ce057d8..0a3b8ae4a29c 100644
--- a/drivers/md/persistent-data/dm-space-map-common.c
+++ b/drivers/md/persistent-data/dm-space-map-common.c
@@ -69,9 +69,9 @@ static struct dm_block_validator index_validator = {
  */
 #define BITMAP_CSUM_XOR 240779
 
-static void bitmap_prepare_for_write(struct dm_block_validator *v,
-				     struct dm_block *b,
-				     size_t block_size)
+static void dm_bitmap_prepare_for_write(struct dm_block_validator *v,
+					struct dm_block *b,
+					size_t block_size)
 {
 	struct disk_bitmap_header *disk_header = dm_block_data(b);
 
@@ -81,9 +81,9 @@ static void bitmap_prepare_for_write(struct dm_block_validator *v,
 						       BITMAP_CSUM_XOR));
 }
 
-static int bitmap_check(struct dm_block_validator *v,
-			struct dm_block *b,
-			size_t block_size)
+static int dm_bitmap_check(struct dm_block_validator *v,
+			   struct dm_block *b,
+			   size_t block_size)
 {
 	struct disk_bitmap_header *disk_header = dm_block_data(b);
 	__le32 csum_disk;
@@ -108,8 +108,8 @@ static int bitmap_check(struct dm_block_validator *v,
 
 static struct dm_block_validator dm_sm_bitmap_validator = {
 	.name = "sm_bitmap",
-	.prepare_for_write = bitmap_prepare_for_write,
-	.check = bitmap_check
+	.prepare_for_write = dm_bitmap_prepare_for_write,
+	.check = dm_bitmap_check,
 };
 
 /*----------------------------------------------------------------*/
@@ -124,7 +124,7 @@ static void *dm_bitmap_data(struct dm_block *b)
 
 #define WORD_MASK_HIGH 0xAAAAAAAAAAAAAAAAULL
 
-static unsigned bitmap_word_used(void *addr, unsigned b)
+static unsigned dm_bitmap_word_used(void *addr, unsigned b)
 {
 	__le64 *words_le = addr;
 	__le64 *w_le = words_le + (b >> ENTRIES_SHIFT);
@@ -170,7 +170,7 @@ static int sm_find_free(void *addr, unsigned begin, unsigned end,
 {
 	while (begin < end) {
 		if (!(begin & (ENTRIES_PER_WORD - 1)) &&
-		    bitmap_word_used(addr, begin)) {
+		    dm_bitmap_word_used(addr, begin)) {
 			begin += ENTRIES_PER_WORD;
 			continue;
 		}
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e9e3308cb0a7..136294139d05 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -385,10 +385,10 @@ static void close_write(struct r1bio *r1_bio)
 		r1_bio->behind_master_bio = NULL;
 	}
 	/* clear the bitmap if all writes complete successfully */
-	bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
-			r1_bio->sectors,
-			!test_bit(R1BIO_Degraded, &r1_bio->state),
-			test_bit(R1BIO_BehindIO, &r1_bio->state));
+	md_bitmap_endwrite(r1_bio->mddev->bitmap, r1_bio->sector,
+			   r1_bio->sectors,
+			   !test_bit(R1BIO_Degraded, &r1_bio->state),
+			   test_bit(R1BIO_BehindIO, &r1_bio->state));
 	md_write_end(r1_bio->mddev);
 }
 
@@ -781,7 +781,7 @@ static int raid1_congested(struct mddev *mddev, int bits)
 static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 {
 	/* flush any pending bitmap writes to disk before proceeding w/ I/O */
-	bitmap_unplug(conf->mddev->bitmap);
+	md_bitmap_unplug(conf->mddev->bitmap);
 	wake_up(&conf->wait_barrier);
 
 	while (bio) { /* submit pending writes */
@@ -1470,10 +1470,8 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
 				alloc_behind_master_bio(r1_bio, bio);
 			}
 
-			bitmap_startwrite(bitmap, r1_bio->sector,
-					  r1_bio->sectors,
-					  test_bit(R1BIO_BehindIO,
-						   &r1_bio->state));
+			md_bitmap_startwrite(bitmap, r1_bio->sector, r1_bio->sectors,
+					     test_bit(R1BIO_BehindIO, &r1_bio->state));
 			first_clone = 0;
 		}
 
@@ -1881,8 +1879,7 @@ static void end_sync_write(struct bio *bio)
 		long sectors_to_go = r1_bio->sectors;
 		/* make sure these bits doesn't get cleared. */
 		do {
-			bitmap_end_sync(mddev->bitmap, s,
-					&sync_blocks, 1);
+			md_bitmap_end_sync(mddev->bitmap, s, &sync_blocks, 1);
 			s += sync_blocks;
 			sectors_to_go -= sync_blocks;
 		} while (sectors_to_go > 0);
@@ -2629,12 +2626,12 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 		 * We can find the current addess in mddev->curr_resync
 		 */
 		if (mddev->curr_resync < max_sector) /* aborted */
-			bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
-						&sync_blocks, 1);
+			md_bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
+					   &sync_blocks, 1);
 		else /* completed sync */
 			conf->fullsync = 0;
 
-		bitmap_close_sync(mddev->bitmap);
+		md_bitmap_close_sync(mddev->bitmap);
 		close_sync(conf);
 
 		if (mddev_is_clustered(mddev)) {
@@ -2654,7 +2651,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 	/* before building a request, check if we can skip these blocks..
 	 * This call the bitmap_start_sync doesn't actually record anything
 	 */
-	if (!bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
+	if (!md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
 	    !conf->fullsync && !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) {
 		/* We can skip this block, and probably several more */
 		*skipped = 1;
@@ -2672,7 +2669,7 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 	 * sector_nr + two times RESYNC_SECTORS
 	 */
 
-	bitmap_cond_end_sync(mddev->bitmap, sector_nr,
+	md_bitmap_cond_end_sync(mddev->bitmap, sector_nr,
 		mddev_is_clustered(mddev) && (sector_nr + 2 * RESYNC_SECTORS > conf->cluster_sync_high));
 
 
@@ -2831,8 +2828,8 @@ static sector_t raid1_sync_request(struct mddev *mddev, sector_t sector_nr,
 		if (len == 0)
 			break;
 		if (sync_blocks == 0) {
-			if (!bitmap_start_sync(mddev->bitmap, sector_nr,
-					       &sync_blocks, still_degraded) &&
+			if (!md_bitmap_start_sync(mddev->bitmap, sector_nr,
+						  &sync_blocks, still_degraded) &&
 			    !conf->fullsync &&
 			    !test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery))
 				break;
@@ -3171,7 +3168,7 @@ static int raid1_resize(struct mddev *mddev, sector_t sectors)
 	    mddev->array_sectors > newsize)
 		return -EINVAL;
 	if (mddev->bitmap) {
-		int ret = bitmap_resize(mddev->bitmap, newsize, 0, 0);
+		int ret = md_bitmap_resize(mddev->bitmap, newsize, 0, 0);
 		if (ret)
 			return ret;
 	}
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 3c60774c8430..02451c0fa2e3 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -438,10 +438,10 @@ static void raid10_end_read_request(struct bio *bio)
 static void close_write(struct r10bio *r10_bio)
 {
 	/* clear the bitmap if all writes complete successfully */
-	bitmap_endwrite(r10_bio->mddev->bitmap, r10_bio->sector,
-			r10_bio->sectors,
-			!test_bit(R10BIO_Degraded, &r10_bio->state),
-			0);
+	md_bitmap_endwrite(r10_bio->mddev->bitmap, r10_bio->sector,
+			   r10_bio->sectors,
+			   !test_bit(R10BIO_Degraded, &r10_bio->state),
+			   0);
 	md_write_end(r10_bio->mddev);
 }
 
@@ -915,7 +915,7 @@ static void flush_pending_writes(struct r10conf *conf)
 		blk_start_plug(&plug);
 		/* flush any pending bitmap writes to disk
 		 * before proceeding w/ I/O */
-		bitmap_unplug(conf->mddev->bitmap);
+		md_bitmap_unplug(conf->mddev->bitmap);
 		wake_up(&conf->wait_barrier);
 
 		while (bio) { /* submit pending writes */
@@ -1100,7 +1100,7 @@ static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
 
 	/* we aren't scheduling, so we can do the write-out directly. */
 	bio = bio_list_get(&plug->pending);
-	bitmap_unplug(mddev->bitmap);
+	md_bitmap_unplug(mddev->bitmap);
 	wake_up(&conf->wait_barrier);
 
 	while (bio) { /* submit pending writes */
@@ -1517,7 +1517,7 @@ retry_write:
 	}
 
 	atomic_set(&r10_bio->remaining, 1);
-	bitmap_startwrite(mddev->bitmap, r10_bio->sector, r10_bio->sectors, 0);
+	md_bitmap_startwrite(mddev->bitmap, r10_bio->sector, r10_bio->sectors, 0);
 
 	for (i = 0; i < conf->copies; i++) {
 		if (r10_bio->devs[i].bio)
@@ -2990,13 +2990,13 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 
 		if (mddev->curr_resync < max_sector) { /* aborted */
 			if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
-				bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
-						&sync_blocks, 1);
+				md_bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
+						   &sync_blocks, 1);
 			else for (i = 0; i < conf->geo.raid_disks; i++) {
 				sector_t sect =
 					raid10_find_virt(conf, mddev->curr_resync, i);
-				bitmap_end_sync(mddev->bitmap, sect,
-						&sync_blocks, 1);
+				md_bitmap_end_sync(mddev->bitmap, sect,
+						   &sync_blocks, 1);
 			}
 		} else {
 			/* completed sync */
@@ -3017,7 +3017,7 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 			}
 			conf->fullsync = 0;
 		}
-		bitmap_close_sync(mddev->bitmap);
+		md_bitmap_close_sync(mddev->bitmap);
 		close_sync(conf);
 		*skipped = 1;
 		return sectors_skipped;
@@ -3111,8 +3111,8 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 			 * we only need to recover the block if it is set in
 			 * the bitmap
 			 */
-			must_sync = bitmap_start_sync(mddev->bitmap, sect,
-						      &sync_blocks, 1);
+			must_sync = md_bitmap_start_sync(mddev->bitmap, sect,
+							 &sync_blocks, 1);
 			if (sync_blocks < max_sync)
 				max_sync = sync_blocks;
 			if (!must_sync &&
@@ -3157,8 +3157,8 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 				}
 			}
 
-			must_sync = bitmap_start_sync(mddev->bitmap, sect,
-						      &sync_blocks, still_degraded);
+			must_sync = md_bitmap_start_sync(mddev->bitmap, sect,
+							 &sync_blocks, still_degraded);
 
 			any_working = 0;
 			for (j=0; j<conf->copies;j++) {
@@ -3334,13 +3334,12 @@ static sector_t raid10_sync_request(struct mddev *mddev, sector_t sector_nr,
 		 * safety reason, which ensures curr_resync_completed is
 		 * updated in bitmap_cond_end_sync.
 		 */
-		bitmap_cond_end_sync(mddev->bitmap, sector_nr,
-				     mddev_is_clustered(mddev) &&
-				     (sector_nr + 2 * RESYNC_SECTORS >
-				      conf->cluster_sync_high));
+		md_bitmap_cond_end_sync(mddev->bitmap, sector_nr,
+					mddev_is_clustered(mddev) &&
+					(sector_nr + 2 * RESYNC_SECTORS > conf->cluster_sync_high));
 
-		if (!bitmap_start_sync(mddev->bitmap, sector_nr,
-				       &sync_blocks, mddev->degraded) &&
+		if (!md_bitmap_start_sync(mddev->bitmap, sector_nr,
+					  &sync_blocks, mddev->degraded) &&
 		    !conf->fullsync && !test_bit(MD_RECOVERY_REQUESTED,
 						 &mddev->recovery)) {
 			/* We can skip this block */
@@ -4015,7 +4014,7 @@ static int raid10_resize(struct mddev *mddev, sector_t sectors)
 	    mddev->array_sectors > size)
 		return -EINVAL;
 	if (mddev->bitmap) {
-		int ret = bitmap_resize(mddev->bitmap, size, 0, 0);
+		int ret = md_bitmap_resize(mddev->bitmap, size, 0, 0);
 		if (ret)
 			return ret;
 	}
@@ -4281,10 +4280,9 @@ static int raid10_start_reshape(struct mddev *mddev)
 	spin_unlock_irq(&conf->device_lock);
 
 	if (mddev->delta_disks && mddev->bitmap) {
-		ret = bitmap_resize(mddev->bitmap,
-				    raid10_size(mddev, 0,
-						conf->geo.raid_disks),
-				    0, 0);
+		ret = md_bitmap_resize(mddev->bitmap,
+				       raid10_size(mddev, 0, conf->geo.raid_disks),
+				       0, 0);
 		if (ret)
 			goto abort;
 	}
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c
index 3c65f52b68f5..e2564d80128f 100644
--- a/drivers/md/raid5-cache.c
+++ b/drivers/md/raid5-cache.c
@@ -324,10 +324,10 @@ void r5c_handle_cached_data_endio(struct r5conf *conf,
 		if (sh->dev[i].written) {
 			set_bit(R5_UPTODATE, &sh->dev[i].flags);
 			r5c_return_dev_pending_writes(conf, &sh->dev[i]);
-			bitmap_endwrite(conf->mddev->bitmap, sh->sector,
-					STRIPE_SECTORS,
-					!test_bit(STRIPE_DEGRADED, &sh->state),
-					0);
+			md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
+					   STRIPE_SECTORS,
+					   !test_bit(STRIPE_DEGRADED, &sh->state),
+					   0);
 		}
 	}
 }
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index be117d0a65a8..4b8f6c476e72 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3295,8 +3295,8 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx,
 		 */
 		set_bit(STRIPE_BITMAP_PENDING, &sh->state);
 		spin_unlock_irq(&sh->stripe_lock);
-		bitmap_startwrite(conf->mddev->bitmap, sh->sector,
-				  STRIPE_SECTORS, 0);
+		md_bitmap_startwrite(conf->mddev->bitmap, sh->sector,
+				     STRIPE_SECTORS, 0);
 		spin_lock_irq(&sh->stripe_lock);
 		clear_bit(STRIPE_BITMAP_PENDING, &sh->state);
 		if (!sh->batch_head) {
@@ -3386,8 +3386,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
 			bi = nextbi;
 		}
 		if (bitmap_end)
-			bitmap_endwrite(conf->mddev->bitmap, sh->sector,
-				STRIPE_SECTORS, 0, 0);
+			md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
+					   STRIPE_SECTORS, 0, 0);
 		bitmap_end = 0;
 		/* and fail all 'written' */
 		bi = sh->dev[i].written;
@@ -3432,8 +3432,8 @@ handle_failed_stripe(struct r5conf *conf, struct stripe_head *sh,
 			}
 		}
 		if (bitmap_end)
-			bitmap_endwrite(conf->mddev->bitmap, sh->sector,
-					STRIPE_SECTORS, 0, 0);
+			md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
+					   STRIPE_SECTORS, 0, 0);
 		/* If we were in the middle of a write the parity block might
 		 * still be locked - so just clear all R5_LOCKED flags
 		 */
@@ -3773,10 +3773,10 @@ returnbi:
 					bio_endio(wbi);
 					wbi = wbi2;
 				}
-				bitmap_endwrite(conf->mddev->bitmap, sh->sector,
-						STRIPE_SECTORS,
-					 !test_bit(STRIPE_DEGRADED, &sh->state),
-						0);
+				md_bitmap_endwrite(conf->mddev->bitmap, sh->sector,
+						   STRIPE_SECTORS,
+						   !test_bit(STRIPE_DEGRADED, &sh->state),
+						   0);
 				if (head_sh->batch_head) {
 					sh = list_first_entry(&sh->batch_list,
 							      struct stripe_head,
@@ -5533,10 +5533,10 @@ static void make_discard_request(struct mddev *mddev, struct bio *bi)
 			for (d = 0;
 			     d < conf->raid_disks - conf->max_degraded;
 			     d++)
-				bitmap_startwrite(mddev->bitmap,
-						  sh->sector,
-						  STRIPE_SECTORS,
-						  0);
+				md_bitmap_startwrite(mddev->bitmap,
+						     sh->sector,
+						     STRIPE_SECTORS,
+						     0);
 			sh->bm_seq = conf->seq_flush + 1;
 			set_bit(STRIPE_BIT_DELAY, &sh->state);
 		}
@@ -6014,11 +6014,11 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
 		}
 
 		if (mddev->curr_resync < max_sector) /* aborted */
-			bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
-					&sync_blocks, 1);
+			md_bitmap_end_sync(mddev->bitmap, mddev->curr_resync,
+					   &sync_blocks, 1);
 		else /* completed sync */
 			conf->fullsync = 0;
-		bitmap_close_sync(mddev->bitmap);
+		md_bitmap_close_sync(mddev->bitmap);
 
 		return 0;
 	}
@@ -6047,7 +6047,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
 	}
 	if (!test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery) &&
 	    !conf->fullsync &&
-	    !bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
+	    !md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, 1) &&
 	    sync_blocks >= STRIPE_SECTORS) {
 		/* we can skip this block, and probably more */
 		sync_blocks /= STRIPE_SECTORS;
@@ -6055,7 +6055,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
 		return sync_blocks * STRIPE_SECTORS; /* keep things rounded to whole stripes */
 	}
 
-	bitmap_cond_end_sync(mddev->bitmap, sector_nr, false);
+	md_bitmap_cond_end_sync(mddev->bitmap, sector_nr, false);
 
 	sh = raid5_get_active_stripe(conf, sector_nr, 0, 1, 0);
 	if (sh == NULL) {
@@ -6078,7 +6078,7 @@ static inline sector_t raid5_sync_request(struct mddev *mddev, sector_t sector_n
 	}
 	rcu_read_unlock();
 
-	bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, still_degraded);
+	md_bitmap_start_sync(mddev->bitmap, sector_nr, &sync_blocks, still_degraded);
 
 	set_bit(STRIPE_SYNC_REQUESTED, &sh->state);
 	set_bit(STRIPE_HANDLE, &sh->state);
@@ -6279,7 +6279,7 @@ static void raid5d(struct md_thread *thread)
 			/* Now is a good time to flush some bitmap updates */
 			conf->seq_flush++;
 			spin_unlock_irq(&conf->device_lock);
-			bitmap_unplug(mddev->bitmap);
+			md_bitmap_unplug(mddev->bitmap);
 			spin_lock_irq(&conf->device_lock);
 			conf->seq_write = conf->seq_flush;
 			activate_bit_delay(conf, conf->temp_inactive_list);
@@ -7734,7 +7734,7 @@ static int raid5_resize(struct mddev *mddev, sector_t sectors)
 	    mddev->array_sectors > newsize)
 		return -EINVAL;
 	if (mddev->bitmap) {
-		int ret = bitmap_resize(mddev->bitmap, sectors, 0, 0);
+		int ret = md_bitmap_resize(mddev->bitmap, sectors, 0, 0);
 		if (ret)
 			return ret;
 	}
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index 1ee46f492267..acf5e8df3504 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -105,6 +105,14 @@
  */
 
 /*
+ * Allocation and deallocation of bitmap.
+ * Provided in lib/bitmap.c to avoid circular dependency.
+ */
+extern unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags);
+extern unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags);
+extern void bitmap_free(const unsigned long *bitmap);
+
+/*
  * lib/bitmap.c provides these functions:
  */
 
diff --git a/lib/bitmap.c b/lib/bitmap.c
index a42eff7e8c48..5b476d8414be 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -13,6 +13,7 @@
 #include <linux/bitops.h>
 #include <linux/bug.h>
 #include <linux/kernel.h>
+#include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/uaccess.h>
 
@@ -1128,6 +1129,25 @@ void bitmap_copy_le(unsigned long *dst, const unsigned long *src, unsigned int n
 EXPORT_SYMBOL(bitmap_copy_le);
 #endif
 
+unsigned long *bitmap_alloc(unsigned int nbits, gfp_t flags)
+{
+	return kmalloc_array(BITS_TO_LONGS(nbits), sizeof(unsigned long),
+			     flags);
+}
+EXPORT_SYMBOL(bitmap_alloc);
+
+unsigned long *bitmap_zalloc(unsigned int nbits, gfp_t flags)
+{
+	return bitmap_alloc(nbits, flags | __GFP_ZERO);
+}
+EXPORT_SYMBOL(bitmap_zalloc);
+
+void bitmap_free(const unsigned long *bitmap)
+{
+	kfree(bitmap);
+}
+EXPORT_SYMBOL(bitmap_free);
+
 #if BITS_PER_LONG == 64
 /**
  * bitmap_from_arr32 - copy the contents of u32 array of bits to bitmap