fs: kill sync_inode

Now that all users of sync_inode() have been deleted, remove
sync_inode().

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/fs-writeback.c

@@ -2729,23 +2729,6 @@ int write_inode_now(struct inode *inode, int sync)
 }
 EXPORT_SYMBOL(write_inode_now);
 
-/**
- * sync_inode - write an inode and its pages to disk.
- * @inode: the inode to sync
- * @wbc: controls the writeback mode
- *
- * sync_inode() will write an inode and its pages to disk.  It will also
- * correctly update the inode on its superblock's dirty inode lists and will
- * update inode->i_state.
- *
- * The caller must have a ref on the inode.
- */
-int sync_inode(struct inode *inode, struct writeback_control *wbc)
-{
-	return writeback_single_inode(inode, wbc);
-}
-EXPORT_SYMBOL(sync_inode);
-
 /**
  * sync_inode_metadata - write an inode to disk
  * @inode: the inode to sync
@@ -2762,6 +2745,6 @@ int sync_inode_metadata(struct inode *inode, int wait)
 		.nr_to_write = 0, /* metadata-only */
 	};
 
-	return sync_inode(inode, &wbc);
+	return writeback_single_inode(inode, &wbc);
 }
 EXPORT_SYMBOL(sync_inode_metadata);

include/linux/fs.h

@@ -2457,7 +2457,6 @@ static inline void file_accessed(struct file *file)
 
 extern int file_modified(struct file *file);
 
-int sync_inode(struct inode *inode, struct writeback_control *wbc);
 int sync_inode_metadata(struct inode *inode, int wait);
 
 struct file_system_type {