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 <[email protected]>

Acked-by: Benjamin Herrenschmidt <[email protected]>
> Cc:

>  Paul Mackerras <[email protected]>
> Cc: Ingo Molnar <[email protected]>
> Cc: Thomas Gleixner <[email protected]>
> Cc: Peter Zijlstra <[email protected]>
> Cc: H. Peter Anvin <[email protected]>
> Cc: Linus Torvalds <[email protected]>
> Cc: Paul Mackerras <[email protected]>
> Cc: James Hogan <[email protected]>
> Cc: James E.J. Bottomley <[email protected]>
> Cc: Helge Deller <[email protected]>
> Cc: Martin Schwidefsky <[email protected]>
> Cc: Heiko Carstens <[email protected]>
> Cc: David S. Miller <[email protected]>
> Cc: Andrew Morton <[email protected]>
> ---
>  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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