f2fs: split set_data_blkaddr from f2fs_update_extent_cache

Split __set_data_blkaddr from f2fs_update_extent_cache for readability.

Additionally rename __set_data_blkaddr to set_data_blkaddr for exporting.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 39a07a59..da13929 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -435,6 +435,7 @@
 			continue;
 
 		dn->data_blkaddr = NULL_ADDR;
+		set_data_blkaddr(dn);
 		f2fs_update_extent_cache(dn);
 		invalidate_blocks(sbi, blkaddr);
 		if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))