Re: [PATCH] x86: make 32bit MAX_HARDIRQSS_PER_CPU to be NR_VECTORS

From: Ingo Molnar
Date: Wed Jan 14 2009 - 06:18:22 EST



* Yinghai Lu <yinghai@xxxxxxxxxx> wrote:

> Impact: clean up to be same as 64bit
>
> 32bit is use per-cpu vector too, so don't use default NR_IRQS
>
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
>
> ---
> arch/x86/include/asm/hardirq_32.h | 3 +++
> arch/x86/include/asm/irq_vectors.h | 4 ++--
> 2 files changed, 5 insertions(+), 2 deletions(-)
>
> Index: linux-2.6/arch/x86/include/asm/hardirq_32.h
> ===================================================================
> --- linux-2.6.orig/arch/x86/include/asm/hardirq_32.h
> +++ linux-2.6/arch/x86/include/asm/hardirq_32.h
> @@ -20,6 +20,9 @@ typedef struct {
>
> DECLARE_PER_CPU(irq_cpustat_t, irq_stat);
>
> +/* We can have at most NR_VECTORS irqs routed to a cpu at a time */
> +#define MAX_HARDIRQS_PER_CPU NR_VECTORS
> +
> #define __ARCH_IRQ_STAT
> #define __IRQ_STAT(cpu, member) (per_cpu(irq_stat, cpu).member)

applied to tip/x86/cleanups. Btw., isnt the irq_vectors.h bit (mentioned
in the diffstat) missing?

Ingo
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