f2fs: no need inc dirty pages under inode lock

No need inc dirty pages under inode lock
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/checkpoint.c

@@ -787,9 +787,9 @@ void update_dirty_page(struct inode *inode, struct page *page)
 
 	spin_lock(&sbi->inode_lock[type]);
 	__add_dirty_inode(inode, type);
-	inode_inc_dirty_pages(inode);
 	spin_unlock(&sbi->inode_lock[type]);
 
+	inode_inc_dirty_pages(inode);
 	SetPagePrivate(page);
 	f2fs_trace_pid(page);
 }