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Message-ID: <20090424131334.10959f78@i1501.lan.towertech.it> Date: Fri, 24 Apr 2009 13:13:34 +0200 From: Alessandro Zummo <alessandro.zummo@...ertech.it> To: rtc-linux@...glegroups.com Cc: david-b@...bell.net, Atsushi Nemoto <anemo@....ocn.ne.jp>, akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, hcegtvedt@...el.com, vapier@...too.org, rongkai.zhan@...driver.com, balajirrao@...nmoko.org, broonie@...nsource.wolfsonmicro.com Subject: Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable with irqs enabled On Fri, 24 Apr 2009 04:10:51 -0700 David Brownell <david-b@...bell.net> wrote: > > use spin_lock() in the IRQ handler and spin_lock_irq/irq_save > > in the setup functions. > > I think you're describing how the *current* scheme is supposed > to work ... except that some IRQ handlers aren't calling the > rtc_update_irq() routine with IRQs blocked. > > Yes, that current scheme works ... modulo those buggy handlers. ok, but why it's necessary to disable the interrupts? Only because the specs says so or because there's a locking issue I'm missing? -- Best regards, Alessandro Zummo, Tower Technologies - Torino, Italy http://www.towertech.it -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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