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

[Sudeep Holla <Sudeep.Holla@arm.com>]

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@arm.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@arm.com>
>> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
>> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
>> Cc: linux390@de.ibm.com
>> Cc: linux-s390@vger.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