linux-kernel - Re: [patch 13/34] cris: Use generic idle loop

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Date:	Wed, 27 Mar 2013 18:10:15 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Jesper Nilsson <jesper.nilsson@...s.com>
cc:	LKML <linux-kernel@...r.kernel.org>, linux-arch@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	Magnus Damm <magnus.damm@...il.com>
Subject: Re: [patch 13/34] cris: Use generic idle loop

On Wed, 27 Mar 2013, Jesper Nilsson wrote:
> 
> On Thu, Mar 21, 2013 at 09:53:06PM -0000, Thomas Gleixner wrote:
> [snip]
> > Index: linux-2.6/arch/cris/arch-v32/kernel/process.c
> > ===================================================================
> > --- linux-2.6.orig/arch/cris/arch-v32/kernel/process.c
> > +++ linux-2.6/arch/cris/arch-v32/kernel/process.c
> > @@ -23,12 +23,10 @@ extern void stop_watchdog(void);
> >  /* We use this if we don't have any better idle routine. */
> >  void default_idle(void)
> >  {
> > -	local_irq_disable();
> > -	if (!need_resched()) {
> > -		/* Halt until exception. */
> > -		__asm__ volatile("ei    \n\t"
> > -				 "halt      ");
> > -	}
> > +	/* Halt until exception. */
> > +	__asm__ volatile("ei    \n\t"
> > +			 "halt      ");
> > +	/* CHECKME: Is this really needed ?? */
> >  	local_irq_enable();
> 
> No, that local_irq_enable() is redundant since we already enabled interrupts
> in the assembler directive above.

That's what I thought:) Will remove it.
 
Thanks,

	tglx
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