linux-kernel - Re: [PATCH 04/15] MIPS: Add sched

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Date:	Fri, 6 Mar 2015 11:58:31 +0000 (GMT)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Deng-Cheng Zhu <dengcheng.zhu@...tec.com>,
	Russell King <linux@....linux.org.uk>
cc:	linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 04/15] MIPS: Add sched_clock support

On Wed, 4 Mar 2015, Deng-Cheng Zhu wrote:

> This will provide sched_clock interface to implement individual
> read_sched_clock(). Not for CAVIUM_OCTEON_SOC as it defines its own
> sched_clock() directly (not using the sched_clock_register interface).
> 
> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@...tec.com>
> ---
>  arch/mips/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
> index 068592a..09405dc 100644
> --- a/arch/mips/Kconfig
> +++ b/arch/mips/Kconfig
> @@ -43,6 +43,7 @@ config MIPS
>  	select GENERIC_SMP_IDLE_THREAD
>  	select BUILDTIME_EXTABLE_SORT
>  	select GENERIC_CLOCKEVENTS
> +	select GENERIC_SCHED_CLOCK if !CAVIUM_OCTEON_SOC
>  	select GENERIC_CMOS_UPDATE
>  	select HAVE_MOD_ARCH_SPECIFIC
>  	select VIRT_TO_BUS

 Why does this change add this question:

ARM Versatile (Express) reference platforms clock source (CLKSRC_VERSATILE) [N/y/?] (NEW) ?

This option enables clock source based on free running
counter available in the "System Registers" block of
ARM Versatile, RealView and Versatile Express reference
platforms.

Symbol: CLKSRC_VERSATILE [=n]
Type  : boolean
Prompt: ARM Versatile (Express) reference platforms clock source
  Location:
    -> Device Drivers
      -> Clock Source drivers
  Defined at drivers/clocksource/Kconfig:216
  Depends on: GENERIC_SCHED_CLOCK [=y] && !ARCH_USES_GETTIMEOFFSET [=n]
  Selects: CLKSRC_OF [=n]

to a MIPS configuration?  I find it silly, this appears a platform 
device to me (use reverse dependencies?).

  Maciej
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