f2fs: use f2fs_get_node_page when write inline data

We just need inode page when write inline data, use
f2fs_get_node_page() to get it instead of using dnode_of_data,
which can eliminate unnecessary struct use.
Signed-off-by: Zijie Wang <wangzijie1@honor.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/inline.c

@@ -262,33 +262,32 @@ int f2fs_convert_inline_inode(struct inode *inode)
 
 int f2fs_write_inline_data(struct inode *inode, struct page *page)
 {
-	struct dnode_of_data dn;
-	int err;
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct page *ipage;
 
-	set_new_dnode(&dn, inode, NULL, NULL, 0);
-	err = f2fs_get_dnode_of_data(&dn, 0, LOOKUP_NODE);
-	if (err)
-		return err;
+	ipage = f2fs_get_node_page(sbi, inode->i_ino);
+	if (IS_ERR(ipage))
+		return PTR_ERR(ipage);
 
 	if (!f2fs_has_inline_data(inode)) {
-		f2fs_put_dnode(&dn);
+		f2fs_put_page(ipage, 1);
 		return -EAGAIN;
 	}
 
 	f2fs_bug_on(F2FS_I_SB(inode), page->index);
 
-	f2fs_wait_on_page_writeback(dn.inode_page, NODE, true, true);
-	memcpy_from_page(inline_data_addr(inode, dn.inode_page),
+	f2fs_wait_on_page_writeback(ipage, NODE, true, true);
+	memcpy_from_page(inline_data_addr(inode, ipage),
 			 page, 0, MAX_INLINE_DATA(inode));
-	set_page_dirty(dn.inode_page);
+	set_page_dirty(ipage);
 
 	f2fs_clear_page_cache_dirty_tag(page);
 
 	set_inode_flag(inode, FI_APPEND_WRITE);
 	set_inode_flag(inode, FI_DATA_EXIST);
 
-	clear_page_private_inline(dn.inode_page);
-	f2fs_put_dnode(&dn);
+	clear_page_private_inline(ipage);
+	f2fs_put_page(ipage, 1);
 	return 0;
 }