linux-kernel - Re: [PATCH v1] clocksource: Sigma Designs Tango 27 MHz xtal

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Date:	Wed, 7 Oct 2015 13:35:23 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Marc Gonzalez <marc_gonzalez@...madesigns.com>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Mans Rullgard <mans@...sr.com>, Mason <slash.tmp@...e.fr>
Subject: Re: [PATCH v1] clocksource: Sigma Designs Tango 27 MHz xtal

On 10/07/2015 01:14 PM, Marc Gonzalez wrote:
> On 07/10/2015 11:47, Daniel Lezcano wrote:
>> On 10/07/2015 10:23 AM, Marc Gonzalez wrote:
>>> Daniel Lezcano wrote:
>>>
>>>> static u64 *notrace* read_sched_clock(void)
>>>
>>> What about read_clocksource? and read_xtal_counter?
>>
>> See commit 89e6a13b88.
>
> If I understand correctly, since read_sched_clock calls read_xtal_counter,
> both functions should be marked notrace.

Yes. We have to prevent the recursion with the ftrace timestamp.


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