linux-kernel - Re: WARNING: at kernel/cpu/idle.c:96

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Date:	Thu, 2 May 2013 12:43:19 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
cc:	linux-kernel@...r.kernel.org
Subject: Re: WARNING: at kernel/cpu/idle.c:96

On Tue, 30 Apr 2013, Markus Trippelsdorf wrote:

> Just booted todays git tree and got the following warning:
> 
> ------------[ cut here ]------------
> WARNING: at kernel/cpu/idle.c:96 cpu_startup_entry+0x14d/0x160()
> Hardware name: System Product Name
> Pid: 0, comm: swapper/2 Not tainted 3.9.0-03462-gab86e97-dirty #424
> Call Trace:
> smpboot: Booting Node   0, Processors  #1 #2
>  [<ffffffff8105b7c0>] ? warn_slowpath_common+0x60/0xa0
>  [<ffffffff8108c26d>] ? cpu_startup_entry+0x14d/0x160
> ---[ end trace 40a24a5550891913 ]---

Fix below.

Thanks,

	tglx

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 607af0d..e4cd638 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -312,6 +312,8 @@ void arch_cpu_idle(void)
 {
 	if (cpuidle_idle_call())
 		x86_idle();
+	else
+		local_irq_enable();
 }
 
 /*
--
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