Re: [PATCH for -tip 4/4] irq: for_each_irq_desc() makes simplify

["Yinghai Lu" <yinghai@kernel.org>]

On Thu, Dec 25, 2008 at 7:29 PM, KOSAKI Motohiro
<kosaki.motohiro@jp.fujitsu.com> wrote:
> Subject: [PATCH] irq: for_each_irq_desc() makes simplify
> Impact: cleanup
>
> all for_each_irq_desc() usage point have !desc check.
> then its check can move into for_each_irq_desc() macro.
>
>
> Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
> CC: Yinghai Lu <yinghai@kernel.org>
> CC: Ingo Molnar <mingo@elte.hu>
> ---
>  arch/x86/kernel/io_apic.c |   10 ----------
>  drivers/xen/events.c      |    3 ---
>  include/linux/irqnr.h     |    8 ++++++--
>  kernel/irq/autoprobe.c    |   15 ---------------
>  kernel/irq/handle.c       |    3 ---
>  kernel/irq/spurious.c     |    5 -----
>  6 files changed, 6 insertions(+), 38 deletions(-)
>
> Index: b/arch/x86/kernel/io_apic.c
> ===================================================================
> --- a/arch/x86/kernel/io_apic.c
> +++ b/arch/x86/kernel/io_apic.c
> @@ -1400,8 +1400,6 @@ void __setup_vector_irq(int cpu)
>
>        /* Mark the inuse vectors */
>        for_each_irq_desc(irq, desc) {
> -               if (!desc)
> -                       continue;
>                cfg = desc->chip_data;
>                if (!cpumask_test_cpu(cpu, cfg->domain))
>                        continue;
..
> Index: b/include/linux/irqnr.h
> ===================================================================
> --- a/include/linux/irqnr.h
> +++ b/include/linux/irqnr.h
> @@ -25,10 +25,14 @@ extern struct irq_desc *irq_to_desc(unsi
>
>  # define for_each_irq_desc(irq, desc)                                  \
>        for (irq = 0, desc = irq_to_desc(irq); irq < nr_irqs;           \
> -            irq++, desc = irq_to_desc(irq))
> +            irq++, desc = irq_to_desc(irq))                            \
> +               if (desc)
> +
> +

looks good.

YH