[PATCH] ARM: ixp4xx: Add "ask" handler for timer interrupts

[Arnd Bergmann]

On Saturday 01 December 2012, Alexander Shiyan wrote:
> +       switch (d->irq) {
> +       case IRQ_IXP4XX_TIMER1:
> +               *IXP4XX_OSST = IXP4XX_OSST_TIMER_1_PEND;
> +               break;
> +       case IRQ_IXP4XX_TIMER2:
> +               *IXP4XX_OSST = IXP4XX_OSST_TIMER_2_PEND;
> +               break;
> +       case IRQ_IXP4XX_TIMESTAMP:
> +               *IXP4XX_OSST = IXP4XX_OSST_TIMER_TS_PEND;
> +               break;
> +       case IRQ_IXP4XX_WDOG:
> +               *IXP4XX_OSST = IXP4XX_OSST_TIMER_WDOG_PEND;
> +               break;

Since you are touching these lines, it probably makes sense to convert them
to use writel_relaxed() in the process. Dereferencing a volatile pointer
in order to do MMIO is strongly discouraged, see
Documentation/volatile-considered-harmful.txt

	Arnd