linux-kernel - Re: [PATCH RFC/RFT v2 3/8] s390: move cacheinfo sysfs to generic cacheinfo infrastructure

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Message-ID: <52F8B95F.5030401@arm.com>
Date:	Mon, 10 Feb 2014 11:34:55 +0000
From:	Sudeep Holla <Sudeep.Holla@....com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
CC:	Sudeep.Holla@....com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	"linux390@...ibm.com" <linux390@...ibm.com>,
	"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>
Subject: Re: [PATCH RFC/RFT v2 3/8] s390: move cacheinfo sysfs to generic
 cacheinfo infrastructure

On 10/02/14 09:50, Heiko Carstens wrote:
> On Fri, Feb 07, 2014 at 04:49:18PM +0000, Sudeep Holla wrote:
>> From: Sudeep Holla <sudeep.holla@....com>
>>
>> This patch removes the redundant sysfs cacheinfo code by making use of
>> the newly introduced generic cacheinfo infrastructure.
>>
>> Signed-off-by: Sudeep Holla <sudeep.holla@....com>
>> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
>> Cc: Heiko Carstens <heiko.carstens@...ibm.com>
>> Cc: linux390@...ibm.com
>> Cc: linux-s390@...r.kernel.org
>> ---
> 
> [...]
> 
>> diff --git a/arch/s390/kernel/processor.c b/arch/s390/kernel/processor.c
>> index 2461202..1f875db 100644
>> --- a/arch/s390/kernel/processor.c
>> +++ b/arch/s390/kernel/processor.c
>> @@ -58,7 +58,6 @@ static int show_cpuinfo(struct seq_file *m, void *v)
>>  			if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
>>  				seq_printf(m, "%s ", hwcap_str[i]);
>>  		seq_puts(m, "\n");
>> -		show_cacheinfo(m);
>>  	}
>>  	get_online_cpus();
>>  	if (cpu_online(n)) {
> 
> You can't remove that. It's a user space visible change.
> 
Correct, I wanted to add show_cacheinfo back as its user ABI already, missed it.

Is it ok if I use cpu0 cacheinfo or to be safer as cpu0 can be offline, use
the cacheinfo of the cpu executing this ?

Regards,
Sudeep


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