linux-kernel - Re: [PATCH v6 03/10] clocksource/drivers/arm_arch

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Date:	Fri, 8 Jul 2016 00:12:26 +0800
From:	Fu Wei <fu.wei@...aro.org>
To:	Hanjun Guo <hanjun.guo@...aro.org>
Cc:	"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>,
	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, harba@...eaurora.org,
	Christopher Covington <cov@...eaurora.org>,
	Timur Tabi <timur@...eaurora.org>,
	G Gregory <graeme.gregory@...aro.org>,
	Al Stone <al.stone@...aro.org>, Jon Masters <jcm@...hat.com>,
	wei@...hat.com, Arnd Bergmann <arnd@...db.de>,
	Wim Van Sebroeck <wim@...ana.be>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Leo Duran <leo.duran@....com>
Subject: Re: [PATCH v6 03/10] clocksource/drivers/arm_arch_timer: Improve
 printk relevant code

Hi Hanjun

On 30 June 2016 at 10:54, Hanjun Guo <hanjun.guo@...aro.org> wrote:
> On 2016/6/30 2:15, fu.wei@...aro.org wrote:
>>
>> From: Fu Wei <fu.wei@...aro.org>
>>
>> This patch defines pr_fmt(fmt) for all pr_* functions,
>> then the pr_* don't need to add "arch_timer:" everytime.
>>
>> Also delete some Blank Spaces in arch_timer_banner,
>> according to the suggestion from checkpatch.pl.
>>
>> No functional change.
>>
>> Signed-off-by: Fu Wei <fu.wei@...aro.org>
>> ---
>>  drivers/clocksource/arm_arch_timer.c | 52
>> +++++++++++++++++++-----------------
>>  1 file changed, 27 insertions(+), 25 deletions(-)
>>
>> diff --git a/drivers/clocksource/arm_arch_timer.c
>> b/drivers/clocksource/arm_arch_timer.c
>> index 966c574..9540e9d 100644
>> --- a/drivers/clocksource/arm_arch_timer.c
>> +++ b/drivers/clocksource/arm_arch_timer.c
>> @@ -29,6 +29,9 @@
>>
>>  #include <clocksource/arm_arch_timer.h>
>>
>> +#undef pr_fmt
>> +#define pr_fmt(fmt) "arch_timer: " fmt
>> +
>>  #define CNTTIDR                0x08
>>  #define CNTTIDR_VIRT(n)        (BIT(1) << ((n) * 4))
>>
>> @@ -388,24 +391,24 @@ arch_timer_detect_rate(void __iomem *cntbase, struct
>> device_node *np)
>>
>>         /* Check the timer frequency. */
>>         if (arch_timer_rate == 0)
>> -               pr_warn("Architected timer frequency not available\n");
>> +               pr_warn("frequency not available\n");
>>  }
>>
>>  static void arch_timer_banner(unsigned type)
>>  {
>> -       pr_info("Architected %s%s%s timer(s) running at %lu.%02luMHz
>> (%s%s%s).\n",
>> -                    type & ARCH_CP15_TIMER ? "cp15" : "",
>> -                    type == (ARCH_CP15_TIMER | ARCH_MEM_TIMER) ?  " and "
>> : "",
>> -                    type & ARCH_MEM_TIMER ? "mmio" : "",
>> -                    (unsigned long)arch_timer_rate / 1000000,
>> -                    (unsigned long)(arch_timer_rate / 10000) % 100,
>> -                    type & ARCH_CP15_TIMER ?
>> -                    (arch_timer_uses_ppi == VIRT_PPI) ? "virt" : "phys" :
>> -                       "",
>> -                    type == (ARCH_CP15_TIMER | ARCH_MEM_TIMER) ?  "/" :
>> "",
>> -                    type & ARCH_MEM_TIMER ?
>> -                       arch_timer_mem_use_virtual ? "virt" : "phys" :
>> -                       "");
>> +       pr_info("%s%s%s timer(s) running at %lu.%02luMHz (%s%s%s).\n",
>> +               type & ARCH_CP15_TIMER ? "cp15" : "",
>> +               type == (ARCH_CP15_TIMER | ARCH_MEM_TIMER) ?  " and " :
>> "",
>> +               type & ARCH_MEM_TIMER ? "mmio" : "",
>> +               (unsigned long)arch_timer_rate / 1000000,
>> +               (unsigned long)(arch_timer_rate / 10000) % 100,
>> +               type & ARCH_CP15_TIMER ?
>> +               (arch_timer_uses_ppi == VIRT_PPI) ? "virt" : "phys" :
>> +               "",
>> +               type == (ARCH_CP15_TIMER | ARCH_MEM_TIMER) ?  "/" : "",
>> +               type & ARCH_MEM_TIMER ?
>> +               arch_timer_mem_use_virtual ? "virt" : "phys" :
>> +               "");
>>  }
>>
>>  u32 arch_timer_get_rate(void)
>> @@ -498,7 +501,7 @@ static void __init arch_counter_register(unsigned
>> type)
>>
>>  static void arch_timer_stop(struct clock_event_device *clk)
>>  {
>> -       pr_debug("arch_timer_teardown disable IRQ%d cpu #%d\n",
>> +       pr_debug("teardown, disable IRQ%d cpu #%d\n",
>
>
> Not a problem of this patch, but arch_timer_teardown is a function
> name? I can't find where it's defined...
>
> I think we can leave arch_timer as it but update it to:
>
> pr_debug("arch_timer_stop disable IRQ%d cpu #%d\n",

If so, you will see "arch_timer: arch_timer_stop disable IRQ%d cpu #%d\n "

I think we can do :

pr_debug(" disable IRQ%d cpu #%d\n",


>
> Others are look good to me.
>
> Thanks
> Hanjun



-- 
Best regards,

Fu Wei
Software Engineer
Red Hat