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Date: Sat, 5 Jul 2014 20:26:34 +0100 From: Russell King - ARM Linux <linux@....linux.org.uk> To: pawandeep oza <oza.contri.linux.kernel@...il.com> Cc: akpm@...ux-foundation.org, holt@....com, mingo@...nel.org, sboyd@...eaurora.org, k.khlebnikov@...sung.com, u.kleine-koenig@...gutronix.de, Nicolas Pitre <nicolas.pitre@...aro.org>, linux-arm-kernel@...ts.infradead.or, linux-kernel@...r.kernel.org Subject: Re: [PATCH] machine_power_off: not only local_irq_disable but also do disable preemption On Sun, Jul 06, 2014 at 12:34:14AM +0530, pawandeep oza wrote: > no this is not a generic code bug, because only in this scenerio, problem > might happen. > because other core is plugged out and now there is no chance that it can > release the spin_lock it would have held previously. > > so this core must run with preemption and interrupt disabled. > > this is only applicable for shutdown, not for any other scenerio. No. See my reply I just sent. Preempting when local interrupts disabled is a bug. -- FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly improving, and getting towards what was expected from 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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