Messages in this thread | | | Date | Sat, 25 Apr 2009 02:06:12 +0900 (JST) | Subject | Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable with irqs enabled | From | Atsushi Nemoto <> |
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On Sat, 25 Apr 2009 01:48:50 +0900 (JST), Atsushi Nemoto <anemo@mba.ocn.ne.jp> 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
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