Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable withirqs enabled

[Atsushi Nemoto]

On Sat, 25 Apr 2009 01:48:50 +0900 (JST), Atsushi Nemoto <anemo@xxxxxxxxxxxxx> wrote:
> Here is a possible example:
> 
> 1. RTC alarm interrupt handler takes rtc->irq_lock by spin_lock()
> 2. A timer interrupt handler calls rtc_uie_timer() for UIE emulation
> 3. rtc_uie_timer() waits on rtc->irq_lock .... deadlock!

Oops, this is wrong.  This deadlock cannot happen since
rtc_uie_timer() will be called in bh (softirq) context, not interrupt
context.

Anyway, I just posted updated patch.  Please take a look.  Thanks.

---
Atsushi Nemoto
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/