f2fs: make __f2fs_write_data_pages() static

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/data.c

@@ -2072,7 +2072,7 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 	return ret;
 }
 
-int __f2fs_write_data_pages(struct address_space *mapping,
+static int __f2fs_write_data_pages(struct address_space *mapping,
 						struct writeback_control *wbc,
 						enum iostat_type io_type)
 {

fs/f2fs/f2fs.h

@@ -2955,9 +2955,6 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 			u64 start, u64 len);
 bool should_update_inplace(struct inode *inode, struct f2fs_io_info *fio);
 bool should_update_outplace(struct inode *inode, struct f2fs_io_info *fio);
-int __f2fs_write_data_pages(struct address_space *mapping,
-						struct writeback_control *wbc,
-						enum iostat_type io_type);
 void f2fs_invalidate_page(struct page *page, unsigned int offset,
 			unsigned int length);
 int f2fs_release_page(struct page *page, gfp_t wait);