Re: [PATCH] [man-pages] adjtimex.2: document clock_adjtime

[Richard Cochran]

On Mon, Nov 20, 2017 at 11:53:02PM +0100, Arnd Bergmann wrote:
>  .B EINVAL
> +The
> +.I clk_id
> +specified is not supported on this system.

We return EINVAL when the clockid is not valid.  That can mean two
things.  Either the SYS-V style hard coded positive clockid is out of
range, or the dynamic negative clockid does not refer to a valid
instance of a clock object.

Dynamic clocks might also return ENODEV in case a hot-plugable device
(like USB) has disappeared after its character device was opened.

Thanks,
Richard