Re: [PATCH 8/8] powerpc: Tell about irq stack coverage

[Benjamin Herrenschmidt]

On Thu, 2013-09-26 at 18:24 +0200, Frederic Weisbecker wrote:
> Now that powerpc runs irq_exit() under the irq stack,
> let the softirq core know about that so that we spare
> the needless stack switch on irq exit's softirq processing.
> 
> Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>

Acked-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc:

>  Paul Mackerras <paulus@xxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> Cc: H. Peter Anvin <hpa@xxxxxxxxx>
> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxxxx>
> Cc: James Hogan <james.hogan@xxxxxxxxxx>
> Cc: James E.J. Bottomley <jejb@xxxxxxxxxxxxxxxx>
> Cc: Helge Deller <deller@xxxxxx>
> Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
> Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
> Cc: David S. Miller <davem@xxxxxxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> ---
>  arch/powerpc/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 38f3b7e..b365d5c 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -138,6 +138,7 @@ config PPC
>  	select OLD_SIGSUSPEND
>  	select OLD_SIGACTION if PPC32
>  	select HAVE_DEBUG_STACKOVERFLOW
> +	select HAVE_IRQ_EXIT_ON_IRQ_STACK
>  
>  config EARLY_PRINTK
>  	bool


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