linux-kernel - Re: [PATCH v2 1/5] apei, mce: Factor out APEI architecture specific MCE calls.

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Date:	Thu, 12 Jun 2014 15:07:02 +0200
From:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
To:	Robert Richter <rric@...nel.org>
CC:	rjw@...ysocki.net, lenb@...nel.org, tony.luck@...el.com,
	bp@...en8.de, m.chehab@...sung.com, bp@...e.de,
	linux-edac@...r.kernel.org, x86@...nel.org,
	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linaro-acpi@...ts.linaro.org
Subject: Re: [PATCH v2 1/5] apei, mce: Factor out APEI architecture specific
 MCE calls.

On 12.06.2014 12:23, Robert Richter wrote:
> On 28.05.14 09:39:26, Tomasz Nowicki wrote:
>> This commit abstracts MCE calls and provides weak corresponding default
>> implementation for those architectures which do not need arch specific
>> actions. Each platform willing to do additional architectural actions
>> should provides desired function definition. It allows us to avoid wrap
>> code into #ifdef in generic code and prevent new platform from introducing
>> dummy stub function too.
>>
>> Initially, there are two APEI arch-specific calls:
>> - apei_arch_enable_cmcff()
>> - apei_arch_report_mem_error()
>> Both interact with MCE driver for X86 architecture.
>>
>> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@...aro.org>
>> ---
>>   arch/x86/kernel/acpi/Makefile |    1 +
>>   arch/x86/kernel/acpi/apei.c   |   56 +++++++++++++++++++++++++++++++++++++++++
>>   drivers/acpi/apei/apei-base.c |   13 ++++++++++
>>   drivers/acpi/apei/ghes.c      |    6 ++---
>>   drivers/acpi/apei/hest.c      |   26 +------------------
>>   include/acpi/apei.h           |    3 +++
>>   6 files changed, 76 insertions(+), 29 deletions(-)
>>   create mode 100644 arch/x86/kernel/acpi/apei.c
>
>>   static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data)
>>   {
>> -#ifdef CONFIG_X86_MCE
>> -	int i;
>> -	struct acpi_hest_ia_corrected *cmc;
>> -	struct acpi_hest_ia_error_bank *mc_bank;
>> -
>> -	if (hest_hdr->type != ACPI_HEST_TYPE_IA32_CORRECTED_CHECK)
>> -		return 0;
>> -
>> -	cmc = (struct acpi_hest_ia_corrected *)hest_hdr;
>> -	if (!cmc->enabled)
>> +	if (!apei_arch_enable_cmcff(hest_hdr, data))
>>   		return 0;
>
> This could be a tail call:
>
> 	return apei_arch_enable_cmcff(...);

Right. Will fix that.

>
> Otherwise the patch looks good to me.

Thanks.

Tomasz
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