linux-kernel - Re: [tip:smp/hotplug] idle: Implement generic idle function

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Message-ID: <CA+8MBbL0Gp3Y7f8SEuOwV-CJB8Hf9OnjrpVp5E7twXXrGpDB_Q@mail.gmail.com>
Date:	Tue, 16 Apr 2013 11:25:50 -0700
From:	Tony Luck <tony.luck@...il.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Peter Zijlstra <peterz@...radead.org>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	magnus.damm@...il.com
Subject: Re: [tip:smp/hotplug] idle: Implement generic idle function

On Tue, Apr 16, 2013 at 6:28 AM, Thomas Gleixner <tglx@...utronix.de> wrote:
> Hmm, is safe_halt() returning with interrupts disabled? If yes, it
> lacks a local_irq_enable().

Quite probably. Adding arch_local_irq_enable() to arch_safe_halt()
makes all the problems go away.  I'll send you the one-line patch
from a system that won't mung it like gmail will.

-Tony
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