Re: [RFC PATCH v12 09/11] ptp: extend input argument for getcrosstimestamp API

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On Fri, May 22, 2020 at 04:37:22PM +0800, Jianyong Wu wrote:
> sometimes we may need tell getcrosstimestamp call back how to perform
> itself. Extending input arguments for getcrosstimestamp API to offer more
> exquisite control for the operation.

This text does not offer any justification for the change in API.
 
> diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
> index c602670bbffb..ba765647e54b 100644
> --- a/include/linux/ptp_clock_kernel.h
> +++ b/include/linux/ptp_clock_kernel.h
> @@ -133,7 +133,8 @@ struct ptp_clock_info {
>  	int (*gettimex64)(struct ptp_clock_info *ptp, struct timespec64 *ts,
>  			  struct ptp_system_timestamp *sts);
>  	int (*getcrosststamp)(struct ptp_clock_info *ptp,
> -			      struct system_device_crosststamp *cts);
> +			      struct system_device_crosststamp *cts,
> +			      long *flag);

Well, you ignored the kernel doc completely.  But in any case, I must
NAK this completely opaque and mysterious change.  You want to add a
random pointer to some flag?  I don't think so.

Thanks,
Richard





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