linux-kernel - Re: [PATCH v19 10/15] clocksource/drivers/arm_arch_timer: Refactor the timer init code to prepare for GTDT

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Message-ID: <20170117122921.GE11939@leverpostej>
Date:   Tue, 17 Jan 2017 12:29:21 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Timur Tabi <timur@...eaurora.org>
Cc:     Fu Wei <fu.wei@...aro.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        Linaro ACPI Mailman List <linaro-acpi@...ts.linaro.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        rruigrok@...eaurora.org, "Abdulhamid, Harb" <harba@...eaurora.org>,
        Christopher Covington <cov@...eaurora.org>,
        G Gregory <graeme.gregory@...aro.org>,
        Al Stone <al.stone@...aro.org>, Jon Masters <jcm@...hat.com>,
        Wei Huang <wei@...hat.com>, Arnd Bergmann <arnd@...db.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
        Leo Duran <leo.duran@....com>,
        Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-watchdog@...r.kernel.org, Tomasz Nowicki <tn@...ihalf.com>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Julien Grall <julien.grall@....com>
Subject: Re: [PATCH v19 10/15] clocksource/drivers/arm_arch_timer: Refactor
 the timer init code to prepare for GTDT

On Tue, Jan 17, 2017 at 06:18:12AM -0600, Timur Tabi wrote:
> Fu Wei wrote:
> >if (i >= ARCH_TIMER_MEM_MAX_FRAMES) {
> >        pr_err(FW_BUG "too many frames, ARMv8 spec only allows 8.\n");
> 
> pr_err(FW_BUG "too many frames, ARMv8 spec only allows %u.\n",
> 	ARCH_TIMER_MEM_MAX_FRAMES);

While I don't see ARCH_TIMER_MEM_MAX_FRAMES changing, this would be
nicer to ensure the result obviously matches.

As for wording, I'd perfer:

	pr_err(FW_BUG "too many frames, only %u are permitted.\n",
	       ARCH_TIMER_MEM_MAX_FRAMES);

... so as to avoid any confusion between spec versions and so on. We can
reconsider the message if/when that changes.

Thanks,
Mark.