linux-kernel - Re: Make HWSPINLOCK a menuconfig to ease disabling

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Date:   Thu, 6 Jul 2017 23:27:01 -0400
From:   Dave Jones <davej@...emonkey.org.uk>
To:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc:     Vincent Legoll <vincent.legoll@...il.com>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: Make HWSPINLOCK a menuconfig to ease disabling

On Thu, Jul 06, 2017 at 11:23:50PM +0000, Linux Kernel wrote:

 >     Make HWSPINLOCK a menuconfig to ease disabling
 >     
 >     So that there's no need to get into the submenu to disable all related config
 >     entries.

Here's how that looks on x86...

*
* Hardware Spinlock drivers
*
Hardware Spinlock drivers (HWSPINLOCK) [N/m/y] (NEW) ?

There is no help available for this option.
Symbol: HWSPINLOCK [=n]
Type  : tristate
Prompt: Hardware Spinlock drivers
  Location:
    -> Device Drivers
  Defined at drivers/hwspinlock/Kconfig:5



No help ? Ok whatever, let's see what happens..

Hardware Spinlock drivers (HWSPINLOCK) [N/m/y] (NEW) m

And then nothing, because none of the drivers that depend on this are available for x86
because of stuff like this..


 >  config HWSPINLOCK_OMAP
 >  	tristate "OMAP Hardware Spinlock device"
 >  	depends on ARCH_OMAP4 || SOC_OMAP5 || SOC_DRA7XX || SOC_AM33XX || SOC_AM43XX

 >  config HWSPINLOCK_QCOM
 >  	tristate "Qualcomm Hardware Spinlock device"
 >  	depends on ARCH_QCOM

 >  config HWSPINLOCK_SIRF
 >  	tristate "SIRF Hardware Spinlock device"
 >  	depends on ARCH_SIRF

 >  config HSEM_U8500
 >  	tristate "STE Hardware Semaphore functionality"
 >  	depends on ARCH_U8500

HWSPINLOCK needs all those depends too.

	Dave