f2fs: Change the type of f2fs_flush_inline_data() to void

The return value of f2fs_flush_inline_data() is not used,
so delete it.
Signed-off-by: NJia Yang <jiayang5@huawei.com>
Reviewed-by: NChao Yu <yuchao0@huawei.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/f2fs.h

@@ -3282,7 +3282,7 @@ void f2fs_ra_node_page(struct f2fs_sb_info *sbi, nid_t nid);
 struct page *f2fs_get_node_page(struct f2fs_sb_info *sbi, pgoff_t nid);
 struct page *f2fs_get_node_page_ra(struct page *parent, int start);
 int f2fs_move_node_page(struct page *node_page, int gc_type);
-int f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
+void f2fs_flush_inline_data(struct f2fs_sb_info *sbi);
 int f2fs_fsync_node_pages(struct f2fs_sb_info *sbi, struct inode *inode,
 			struct writeback_control *wbc, bool atomic,
 			unsigned int *seq_id);

fs/f2fs/node.c

@@ -1816,12 +1816,11 @@ static bool flush_dirty_inode(struct page *page)
 	return true;
 }
 
-int f2fs_flush_inline_data(struct f2fs_sb_info *sbi)
+void f2fs_flush_inline_data(struct f2fs_sb_info *sbi)
 {
 	pgoff_t index = 0;
 	struct pagevec pvec;
 	int nr_pages;
-	int ret = 0;
 
 	pagevec_init(&pvec);
 
@@ -1860,7 +1859,6 @@ int f2fs_flush_inline_data(struct f2fs_sb_info *sbi)
 		pagevec_release(&pvec);
 		cond_resched();
 	}
-	return ret;
 }
 
 int f2fs_sync_node_pages(struct f2fs_sb_info *sbi,