netdev - Re: [RFC PATCH v2 2/7] x86/tsc: Add clocksource ID, set system_counterval_t.cs

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Message-ID: <87le8dgoix.ffs@tglx>
Date: Thu, 25 Jan 2024 21:13:10 +0100
From: Thomas Gleixner <tglx@...utronix.de>
To: Simon Horman <horms@...nel.org>, Peter Hilber
 <peter.hilber@...nsynergy.com>
Cc: linux-kernel@...r.kernel.org, "D, Lakshmi Sowjanya"
 <lakshmi.sowjanya.d@...el.com>, jstultz@...gle.com, giometti@...eenne.com,
 corbet@....net, andriy.shevchenko@...ux.intel.com, "Dong, Eddie"
 <eddie.dong@...el.com>, "Hall, Christopher S"
 <christopher.s.hall@...el.com>, Sean Christopherson <seanjc@...gle.com>,
 Paolo Bonzini <pbonzini@...hat.com>, Ingo Molnar <mingo@...hat.com>,
 Borislav Petkov <bp@...en8.de>, Dave Hansen <dave.hansen@...ux.intel.com>,
 x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>, Wanpeng Li
 <wanpengli@...cent.com>, Vitaly Kuznetsov <vkuznets@...hat.com>, Mark
 Rutland <mark.rutland@....com>, Marc Zyngier <maz@...nel.org>, Daniel
 Lezcano <daniel.lezcano@...aro.org>, Richard Cochran
 <richardcochran@...il.com>, kvm@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [RFC PATCH v2 2/7] x86/tsc: Add clocksource ID, set
 system_counterval_t.cs_id

On Sun, Dec 24 2023 at 16:27, Simon Horman wrote:
> On Fri, Dec 15, 2023 at 11:06:07PM +0100, Peter Hilber wrote:
>> @@ -1327,12 +1334,15 @@ EXPORT_SYMBOL(convert_art_to_tsc);
>>   * that this flag is set before conversion to TSC is attempted.
>>   *
>>   * Return:
>> - * struct system_counterval_t - system counter value with the pointer to the
>> + * struct system_counterval_t - system counter value with the ID of the
>>   *	corresponding clocksource
>>   *	@cycles:	System counter value
>>   *	@cs:		Clocksource corresponding to system counter value. Used
>>   *			by timekeeping code to verify comparability of two cycle
>>   *			values.
>> + *	@cs_id:		Clocksource ID corresponding to system counter value.
>> + *			Used by timekeeping code to verify comparability of two
>> + *			cycle values.
>
> None of the documented parameters to convert_art_ns_to_tsc() above
> correspond to the parameters of convert_art_ns_to_tsc() below.

Obviously not because they document the return value. The sole argument
of the function @art_ns is documented correctly.

> The same patch that corrects the kernel doc for convert_art_ns_to_tsc()
> could also correct the kernel doc for tsc_refine_calibration_work()
> by documenting it's work parameter.

That's a separate cleanup. Feel free to send a patch for that.

Thanks,

        tglx