[PATCH v4 21/21] vfs: Remove mmb_fsync()

[Jan Kara <jack@suse.cz>]

Now that everybody has been converted from mmb_fsync() (and it's variant
mmb_fsync_noflush()) to simple_fsync(), we can delete these calls.

Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/buffer.c                 | 74 -------------------------------------
 include/linux/buffer_head.h |  4 --
 2 files changed, 78 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 7e5ad9f4754d..be8b57a635cd 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -628,80 +628,6 @@ int mmb_sync(struct mapping_metadata_bhs *mmb)
 }
 EXPORT_SYMBOL(mmb_sync);
 
-/**
- * mmb_fsync_noflush - fsync implementation for simple filesystems with
- * 		       metadata buffers list
- *
- * @file:	file to synchronize
- * @mmb:	list of metadata bhs to flush
- * @start:	start offset in bytes
- * @end:	end offset in bytes (inclusive)
- * @datasync:	only synchronize essential metadata if true
- *
- * This is an implementation of the fsync method for simple filesystems which
- * track all non-inode metadata in the buffers list hanging off the @mmb
- * structure.
- */
-int mmb_fsync_noflush(struct file *file, struct mapping_metadata_bhs *mmb,
-		      loff_t start, loff_t end, bool datasync)
-{
-	struct inode *inode = file->f_mapping->host;
-	int err;
-	int ret = 0;
-
-	err = file_write_and_wait_range(file, start, end);
-	if (err)
-		return err;
-
-	if (mmb)
-		ret = mmb_sync(mmb);
-	if (!(inode_state_read_once(inode) & (I_DIRTY_ALL | I_SYNC)))
-		goto out;
-	if (datasync &&
-	    !(inode_state_read_once(inode) & (I_DIRTY_DATASYNC | I_SYNC)))
-		goto out;
-
-	err = sync_inode_metadata(inode, 1);
-	if (ret == 0)
-		ret = err;
-
-out:
-	/* check and advance again to catch errors after syncing out buffers */
-	err = file_check_and_advance_wb_err(file);
-	if (ret == 0)
-		ret = err;
-	return ret;
-}
-EXPORT_SYMBOL(mmb_fsync_noflush);
-
-/**
- * mmb_fsync - fsync implementation for simple filesystems with metadata
- * 	       buffers list
- *
- * @file:	file to synchronize
- * @mmb:	list of metadata bhs to flush
- * @start:	start offset in bytes
- * @end:	end offset in bytes (inclusive)
- * @datasync:	only synchronize essential metadata if true
- *
- * This is an implementation of the fsync method for simple filesystems which
- * track all non-inode metadata in the buffers list hanging off the @mmb
- * structure. This also makes sure that a device cache flush operation is
- * called at the end.
- */
-int mmb_fsync(struct file *file, struct mapping_metadata_bhs *mmb,
-	      loff_t start, loff_t end, bool datasync)
-{
-	struct inode *inode = file->f_mapping->host;
-	int ret;
-
-	ret = mmb_fsync_noflush(file, mmb, start, end, datasync);
-	if (!ret)
-		ret = blkdev_issue_flush(inode->i_sb->s_bdev);
-	return ret;
-}
-EXPORT_SYMBOL(mmb_fsync);
-
 /*
  * Called when we've recently written block `bblock', and it is known that
  * `bblock' was for a buffer_boundary() buffer.  This means that the block at
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 8b23bc9a244c..fd2c7115c054 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -210,10 +210,6 @@ void bh_end_async_write(struct bio *bio);
 
 /* Things to do with metadata buffers list */
 void mmb_mark_buffer_dirty(struct buffer_head *bh, struct mapping_metadata_bhs *mmb);
-int mmb_fsync_noflush(struct file *file, struct mapping_metadata_bhs *mmb,
-		      loff_t start, loff_t end, bool datasync);
-int mmb_fsync(struct file *file, struct mapping_metadata_bhs *mmb,
-	      loff_t start, loff_t end, bool datasync);
 void clean_bdev_aliases(struct block_device *bdev, sector_t block,
 			sector_t len);
 static inline void clean_bdev_bh_alias(struct buffer_head *bh)
-- 
2.51.0