linux-kernel - Re: [PATCHv2 1/2] clocksource: fix type confusion for clocksource_mmio_readX

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Date:	Mon, 19 May 2014 11:09:27 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	"Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCHv2 1/2] clocksource: fix type confusion for clocksource_mmio_readX_Y

On 05/19/2014 04:35 AM, Li.Xiubo@...escale.com wrote:
> Hi,
> 
> I'd like to know the status about this patch series...
> :）

I think the patches are ok. I have them in my queue for 3.16.

>> -----Original Message-----
>> From: Xiubo Li [mailto:Li.Xiubo@...escale.com]
>> Sent: Wednesday, April 23, 2014 10:12 AM
>> To: daniel.lezcano@...aro.org; tglx@...utronix.de; linux-
>> kernel@...r.kernel.org
>> Cc: Xiubo Li-B47053
>> Subject: [PATCHv2 1/2] clocksource: fix type confusion for
>> clocksource_mmio_readX_Y
>>
>> The types' definations are:
>>     o  cycle_t       -> u64
>>     o  readl_relaxed -> u32
>>     o  readw_relaxed -> u16
>>
>> So let clocksource_mmio_readX_Ys return a cast to cycle_t, though
>> this maybe look reduntant sometimes, it make sense and they will be
>> more readable and less confusion...
>>
>> This patch clarifies the functions type and fix it.
>>
>> Signed-off-by: Xiubo Li <Li.Xiubo@...escale.com>
>> Cc: Daniel Lezcano <daniel.lezcano@...aro.org>
>> ---
>>   drivers/clocksource/mmio.c | 8 ++++----
>>   1 file changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/clocksource/mmio.c b/drivers/clocksource/mmio.c
>> index c0e2512..19a6b3f 100644
>> --- a/drivers/clocksource/mmio.c
>> +++ b/drivers/clocksource/mmio.c
>> @@ -22,22 +22,22 @@ static inline struct clocksource_mmio
>> *to_mmio_clksrc(struct clocksource *c)
>>
>>   cycle_t clocksource_mmio_readl_up(struct clocksource *c)
>>   {
>> -	return readl_relaxed(to_mmio_clksrc(c)->reg);
>> +	return (cycle_t)readl_relaxed(to_mmio_clksrc(c)->reg);
>>   }
>>
>>   cycle_t clocksource_mmio_readl_down(struct clocksource *c)
>>   {
>> -	return ~readl_relaxed(to_mmio_clksrc(c)->reg);
>> +	return ~(cycle_t)readl_relaxed(to_mmio_clksrc(c)->reg);
>>   }
>>
>>   cycle_t clocksource_mmio_readw_up(struct clocksource *c)
>>   {
>> -	return readw_relaxed(to_mmio_clksrc(c)->reg);
>> +	return (cycle_t)readw_relaxed(to_mmio_clksrc(c)->reg);
>>   }
>>
>>   cycle_t clocksource_mmio_readw_down(struct clocksource *c)
>>   {
>> -	return ~(unsigned)readw_relaxed(to_mmio_clksrc(c)->reg);
>> +	return ~(cycle_t)readw_relaxed(to_mmio_clksrc(c)->reg);
>>   }
>>
>>   /**
>> --
>> 1.8.4
> 


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