linux-kernel - Re: [PATCH v7 3/4] perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver

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Message-ID: <CACgAJHzrvUGDUXgajQswO-ACfs2qcy8b-BL_89QaDqWpWHPmkQ@mail.gmail.com>
Date:	Mon, 11 Jul 2016 11:12:16 -0700
From:	Tai Tri Nguyen <ttnguyen@....com>
To:	Paul Gortmaker <paul.gortmaker@...driver.com>
Cc:	Mark Rutland <mark.rutland@....com>,
	Will Deacon <will.deacon@....com>, catalin.marinas@....com,
	LKML <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, patches <patches@....com>
Subject: Re: [PATCH v7 3/4] perf: xgene: Add APM X-Gene SoC Performance
 Monitoring Unit driver

Hi Paul,

Thanks for your comments.

On Sat, Jul 9, 2016 at 5:00 PM, Paul Gortmaker
<paul.gortmaker@...driver.com> wrote:
> On Wed, Jul 6, 2016 at 8:07 PM, Tai Nguyen <ttnguyen@....com> wrote:
>> Signed-off-by: Tai Nguyen <ttnguyen@....com>
>> ---
>>  Documentation/perf/xgene-pmu.txt |   48 ++
>>  drivers/perf/Kconfig             |    7 +
>>  drivers/perf/Makefile            |    1 +
>>  drivers/perf/xgene_pmu.c         | 1398 ++++++++++++++++++++++++++++++++++++++
>>  4 files changed, 1454 insertions(+)
>>  create mode 100644 Documentation/perf/xgene-pmu.txt
>>  create mode 100644 drivers/perf/xgene_pmu.c
>>
>
> [...]
>
>> diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
>> index 04e2653..4d5c5f9 100644
>> --- a/drivers/perf/Kconfig
>> +++ b/drivers/perf/Kconfig
>> @@ -12,4 +12,11 @@ config ARM_PMU
>>           Say y if you want to use CPU performance monitors on ARM-based
>>           systems.
>>
>> +config XGENE_PMU
>> +        depends on PERF_EVENTS && ARCH_XGENE
>> +        bool "APM X-Gene SoC PMU"
>
> If the driver is bool, then please avoid using module.h and anything from
> within it.  They are either no-ops when built in, or there are non-modular
> equivalents available, so it is entirely avoidable, and makes for smaller
> and better code.
>

Okay, I'll remove the module.h

>> +        default n
>> +        help
>> +          Say y if you want to use APM X-Gene SoC performance monitors.
>> +
>>  endmenu
>> diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
>> index acd2397..b116e98 100644
>> --- a/drivers/perf/Makefile
>> +++ b/drivers/perf/Makefile
>> @@ -1 +1,2 @@
>>  obj-$(CONFIG_ARM_PMU) += arm_pmu.o
>> +obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
>
> [...]
>                     ver = {
>> +               .name           = "xgene-pmu",
>> +               .of_match_table = xgene_pmu_of_match,
>> +               .acpi_match_table = ACPI_PTR(xgene_pmu_acpi_match),
>> +       },
>> +};
>> +
>> +module_platform_driver(xgene_pmu_driver);
>
> builtin_platform_driver
>

Okay, I'll change it.

>> +
>> +MODULE_DESCRIPTION("APM X-Gene SoC PMU driver");
>> +MODULE_AUTHOR("Hoan Tran <hotran@....com>");
>> +MODULE_AUTHOR("Tai Nguyen <ttnguyen@....com>");
>> +MODULE_LICENSE("GPL");
>
> As long as this information is at the top of the file, then these can
> go away too -- just like MODULE_DEVICE_TABLE they are no-op.
>

Will get rid of them.

Regards,
-- 
Tai