linux-kernel - Re: [PATCH] clocksource: whitelist asm9260

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <54EB7816.8080506@linaro.org>
Date:	Mon, 23 Feb 2015 19:57:26 +0100
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Guenter Roeck <linux@...ck-us.net>
CC:	Oleksij Rempel <linux@...pel-privat.de>,
	linux-kernel@...r.kernel.org, tglx@...utronix.de
Subject: Re: [PATCH] clocksource: whitelist asm9260_timer driver for ARM

On 02/23/2015 06:57 PM, Guenter Roeck wrote:
> On Mon, Feb 23, 2015 at 06:48:47PM +0100, Daniel Lezcano wrote:
>> On 02/18/2015 08:17 AM, Guenter Roeck wrote:
>>> On 02/10/2015 07:57 AM, Oleksij Rempel wrote:
>>>> For now it is easier to allow only tested platforms, instead of
>>>> fighting with different platform specific issues.
>>>>
>>>> This patch is fixing compile error on ARCH=SPARC and SPARC64:
>>>>
>>>> Building sparc64:allmodconfig ... failed
>>>> --------------
>>>> Error log:
>>>> drivers/built-in.o: In function `asm9260_timer_init':
>>>> asm9260_timer.c:(.init.text+0x60d4): undefined reference to
>>>> `of_io_request_and_map'
>>>>
>>>> Tested-by: Guenter Roeck <linux@...ck-us.net>
>>>> Reported-by: Guenter Roeck <linux@...ck-us.net>
>>>> Signed-off-by: Oleksij Rempel <linux@...pel-privat.de>
>>>
>>> The problem solved by this patch has affected linux-next
>>> for almost a month, the problem is now in mainline, yet
>>> I have not seen feedback from anyone about it.
>>>
>>> Did the patch get lost, or is there some problem with it ?
>>
>> Hi Guenter, Oleksij,
>>
>> so I reviewed the patch more in detail.
>>
>> The sparc/sparc64 configuration shouldn't select this timer.
>>
>> What do you think about the following patch ?
>>
> Yes, that makes sense to me. What it really means is that no architecture
> but MACH_ASM9260 should select the ASM9260 timer driver, and that it must
> always be present on MACH_ASM9260 (is that true, or should it still be
> configurable ?).

Regarding the previous configuration (default y if MACH_ASM9260) I 
assume it is always the case.


> I just hope that _some_ patch fixing the build will make it into
> the upstream kernel before 4.0 is released ;-).
>
> Thanks,
> Guenter
>
>> diff --git a/arch/arm/mach-asm9260/Kconfig b/arch/arm/mach-asm9260/Kconfig
>> index 8423be7..5224120 100644
>> --- a/arch/arm/mach-asm9260/Kconfig
>> +++ b/arch/arm/mach-asm9260/Kconfig
>> @@ -2,5 +2,7 @@ config MACH_ASM9260
>>   	bool "Alphascale ASM9260"
>>   	depends on ARCH_MULTI_V5
>>   	select CPU_ARM926T
>> +	select ASM9260_TIMER
>> +	select GENERIC_CLOCKEVENTS
>>   	help
>>   	  Support for Alphascale ASM9260 based platform.
>> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
>> index 72a3827..f9c1995 100644
>> --- a/drivers/clocksource/Kconfig
>> +++ b/drivers/clocksource/Kconfig
>> @@ -60,6 +60,11 @@ config VT8500_TIMER
>>   config CADENCE_TTC_TIMER
>>   	bool
>>
>> +config ASM9260_TIMER
>> +	bool
>> +	select CLKSRC_MMIO
>> +	select CLKSRC_OF
>> +
>>   config CLKSRC_NOMADIK_MTU
>>   	bool
>>   	depends on (ARCH_NOMADIK || ARCH_U8500)
>> @@ -235,15 +240,4 @@ config CLKSRC_MIPS_GIC
>>   	bool
>>   	depends on MIPS_GIC
>>   	select CLKSRC_OF
>> -
>> -config ASM9260_TIMER
>> -	bool "Alphascale ASM9260 timer driver"
>> -	depends on GENERIC_CLOCKEVENTS
>> -	select CLKSRC_MMIO
>> -	select CLKSRC_OF
>> -	default y if MACH_ASM9260
>> -	help
>> -	  This enables build of a clocksource and clockevent driver for
>> -	  the 32-bit System Timer hardware available on a Alphascale ASM9260.
>> -
>>   endmenu
>>
>>
>>
>>
>>
>>>
>>>> ---
>>>>   drivers/clocksource/Kconfig | 2 +-
>>>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
>>>> index bfaaae4..39d5c11 100644
>>>> --- a/drivers/clocksource/Kconfig
>>>> +++ b/drivers/clocksource/Kconfig
>>>> @@ -231,7 +231,7 @@ config CLKSRC_MIPS_GIC
>>>>
>>>>   config ASM9260_TIMER
>>>>       bool "Alphascale ASM9260 timer driver"
>>>> -    depends on GENERIC_CLOCKEVENTS
>>>> +    depends on GENERIC_CLOCKEVENTS && ARM
>>>>       select CLKSRC_MMIO
>>>>       select CLKSRC_OF
>>>>       default y if MACH_ASM9260
>>>>
>>>
>>
>>
>> --
>>   <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
>>
>> Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
>> <http://twitter.com/#!/linaroorg> Twitter |
>> <http://www.linaro.org/linaro-blog/> Blog
>>


-- 
  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/