[PATCH 2/2 v2] arm: Allow forced irq threading

[Sekhar Nori]

On Monday 12 August 2013 08:03 PM, Sebastian Andrzej Siewior wrote:
> From: Thomas Gleixner <tglx at linutronix.de>
> 
> All timer interrupts and the perf interrupt are marked NO_THREAD, so
> its safe to allow forced interrupt threading.
> 
> Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
> ---
> On Thu, Feb 14, 2013 at 11:04:48PM +0100, Thomas Gleixner wrote:
>> On Thu, 14 Feb 2013, Russell King - ARM Linux wrote:
>>
>>> What effect does this have on IRQ latency, particularly on the slower CPUs?
>>
>> It does not affect anything unless you add "threadirqs" to the kernel
>> command line. This command line argument puts the kernel into forced
>> irq threading mode. Otherwise it just works as now.
> 
> I reposted the patch since it no longer applies clean on v3.11-rc5. From what
> tglx explained, I don't think there are any outstanding issues, are there?
> 
>  arch/arm/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 43594d5..405e4c0 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -20,6 +20,7 @@ config ARM
>  	select GENERIC_STRNCPY_FROM_USER
>  	select GENERIC_STRNLEN_USER
>  	select HARDIRQS_SW_RESEND
> +	select IRQ_FORCED_THREADING

Please add in alphabetic sorted order.

>  	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
>  	select HAVE_ARCH_KGDB
>  	select HAVE_ARCH_SECCOMP_FILTER

Thanks,
Sekhar