On Sun, Aug 27, 2023 at 09:28:28PM +0800, Hao Xu wrote:> +++ b/include/linux/file.h> @@ -81,6 +81,8 @@ static inline void fdput_pos(struct fd f)> fdput(f);> }> > +extern int file_pos_lock_nowait(struct file *file, bool nowait);No extern on function declarations.