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From: Thomas Gleixner <tglx@linutronix.de>
To: Tony Luck <tony.luck@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@elte.hu>,
	"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andi Kleen <ak@linux.intel.com>, Peter Anvin <hpa@zytor.com>,
	Mike Galbraith <bitbucket@online.de>,
	Arjan van de Ven <arjan@linux.intel.com>,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Fenghua Yu <fenghua.yu@intel.com>
Subject: Re: [patch 4/6] ia64: Use preempt_schedule_irq
Date: Wed, 20 Nov 2013 21:57:48 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.02.1311202121340.30673@ionos.tec.linutronix.de> (raw)
In-Reply-To: <CA+8MBbKq1idWt1OSpRM3mWMDAQaEoewrU=h=m_pFoidVy6OA-Q@mail.gmail.com>



On Wed, 20 Nov 2013, Tony Luck wrote:

> On Tue, Sep 17, 2013 at 11:53 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > Use the proper core function instead of fiddling with PREEMPT_ACTIVE
> > and enable/disable interrupts in the low level code.
> >
> > Index: linux-2.6/arch/ia64/kernel/entry.S
> > ===================================================================
> > --- linux-2.6.orig/arch/ia64/kernel/entry.S
> > +++ linux-2.6/arch/ia64/kernel/entry.S
> ...
> > -       br.call.spnt.many rp=schedule
> > +       br.call.spnt.many rp=preempt_schedule_irq
> 
> This just hit mainline ... and I'm getting
> 
> arch/ia64/kernel/built-in.o: In function `skip_rbs_switch':
> (.text+0xef2): undefined reference to `preempt_schedule_irq'
> make: *** [vmlinux] Error 1

Hrmpf.
 
> Probably because I have CONFIG_PREEMPT=n, and there seems only
> to be a definition for this function in kernel/sched/core.c when it is =y.

Bah. I probably compiled that with preempt=y ...
 
> Do we need a stub for the =n case:
> 
> asmlinkage void __sched preempt_schedule_irq(void)
> {
>            schedule();
> }
> 
> Or is life more complicated than that?

Hmm, I think I fubared that and you decided to ignore my patch :) 

Let me look at it tomorrow morning with full awake brain cells.

Thanks,

	tglx

  reply	other threads:[~2013-11-20 20:57 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-17  9:10 [PATCH 00/11] preempt_count rework -v3 Peter Zijlstra
2013-09-17  9:10 ` [PATCH 01/11] x86: Use asm goto to implement better modify_and_test() functions Peter Zijlstra
2013-09-18 18:44   ` Linus Torvalds
     [not found]     ` <4ec87843-c29a-401a-a54f-2cd4d61fba62@email.android.com>
2013-09-19  8:31       ` Andi Kleen
2013-09-19  9:39         ` Ingo Molnar
2013-09-20  4:43         ` H. Peter Anvin
2013-09-17  9:10 ` [PATCH 02/11] sched, rcu: Make RCU use resched_cpu() Peter Zijlstra
2013-09-17 14:40   ` Peter Zijlstra
2013-09-23 16:55     ` Paul E. McKenney
2013-09-23 21:18       ` Paul E. McKenney
2013-09-24  8:07         ` Peter Zijlstra
2013-09-24 13:37           ` Paul E. McKenney
2013-09-17  9:10 ` [PATCH 03/11] sched: Remove {set,clear}_need_resched Peter Zijlstra
2013-09-17  9:10 ` [PATCH 04/11] sched, idle: Fix the idle polling state logic Peter Zijlstra
2013-09-17  9:10 ` [PATCH 05/11] sched: Introduce preempt_count accessor functions Peter Zijlstra
2013-09-17  9:10 ` [PATCH 06/11] sched: Add NEED_RESCHED to the preempt_count Peter Zijlstra
2013-09-17  9:10 ` [PATCH 07/11] sched, arch: Create asm/preempt.h Peter Zijlstra
2013-09-17  9:10 ` [PATCH 08/11] sched: Create more preempt_count accessors Peter Zijlstra
2013-09-17  9:10 ` [PATCH 09/11] sched: Extract the basic add/sub preempt_count modifiers Peter Zijlstra
2013-09-17  9:10 ` [PATCH 10/11] sched, x86: Provide a per-cpu preempt_count implementation Peter Zijlstra
2013-09-17  9:10 ` [PATCH 11/11] sched, x86: Optimize the preempt_schedule() call Peter Zijlstra
2013-09-17 20:23   ` Peter Zijlstra
2013-09-17 10:53 ` [PATCH 00/11] preempt_count rework -v3 Ingo Molnar
2013-09-17 11:22   ` Peter Zijlstra
2013-09-17 18:53 ` [patch 0/6] Make all preempt_count related constants generic Thomas Gleixner
2013-09-17 18:53   ` [patch 1/6] hardirq: Make hardirq bits generic Thomas Gleixner
2013-09-17 20:00     ` Geert Uytterhoeven
2013-09-17 21:24       ` Thomas Gleixner
2013-09-18 14:06         ` Thomas Gleixner
2013-09-19 15:14           ` Thomas Gleixner
2013-09-19 17:02             ` Andreas Schwab
2013-09-19 18:19               ` Geert Uytterhoeven
2013-09-20  9:26                 ` Thomas Gleixner
2013-11-04 12:06                 ` Thomas Gleixner
2013-11-04 19:44                   ` Geert Uytterhoeven
2013-11-04 19:44                     ` Geert Uytterhoeven
2013-11-06 17:23                     ` Thomas Gleixner
2013-11-07 14:12                       ` Geert Uytterhoeven
2013-11-07 16:39                         ` Thomas Gleixner
2013-11-10  8:49                           ` Michael Schmitz
2013-11-10  9:12                             ` Geert Uytterhoeven
2013-11-11 14:11                               ` Thomas Gleixner
2013-11-11 19:34                                 ` Thomas Gleixner
2013-11-11 20:52                                   ` Thomas Gleixner
2013-11-12  6:56                                     ` Michael Schmitz
2013-11-12  6:56                                       ` Michael Schmitz
2013-11-12  8:44                                       ` schmitz
2013-11-12  8:44                                         ` schmitz
2013-11-12 15:08                                     ` Geert Uytterhoeven
2013-11-13 19:42                                     ` [tip:irq/urgent] m68k: Simplify low level interrupt handling code tip-bot for Thomas Gleixner
2013-11-12 14:09                                   ` [patch 1/6] hardirq: Make hardirq bits generic Geert Uytterhoeven
2013-11-11 19:42                                 ` Andreas Schwab
2013-11-12  9:18                                   ` Thomas Gleixner
2013-11-13 19:42     ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2013-09-17 18:53   ` [patch 2/6] h8300: Use schedule_preempt_irq Thomas Gleixner
2013-09-20 17:41     ` Guenter Roeck
2013-09-20 21:46       ` Thomas Gleixner
2013-09-17 18:53   ` [patch 3/6] m32r: Use preempt_schedule_irq Thomas Gleixner
2013-11-13 19:42     ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2013-09-17 18:53   ` [patch 5/6] sparc: " Thomas Gleixner
2013-09-17 22:54     ` David Miller
2013-09-17 23:23       ` Thomas Gleixner
2013-09-18  0:12         ` David Miller
2013-11-13 19:43     ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2013-09-17 18:53   ` [patch 4/6] ia64: " Thomas Gleixner
2013-11-13 19:43     ` [tip:irq/urgent] " tip-bot for Thomas Gleixner
2013-11-20 19:59     ` [patch 4/6] " Tony Luck
2013-11-20 20:57       ` Thomas Gleixner [this message]
2013-11-21 11:41         ` Thomas Gleixner
2013-11-21 12:39           ` Frederic Weisbecker
2013-11-21 13:06           ` Peter Zijlstra
2013-11-21 13:30             ` Thomas Gleixner
2013-11-21 18:57               ` Tony Luck
2013-11-26 18:37                 ` Tony Luck
2013-11-26 18:58                   ` Peter Zijlstra
2013-11-27 13:36                     ` Ingo Molnar
2013-11-27 14:07           ` [tip:sched/urgent] sched: Expose preempt_schedule_irq() tip-bot for Thomas Gleixner
2013-09-17 18:53   ` [patch 6/6] preempt: Make PREEMPT_ACTIVE generic Thomas Gleixner
2013-09-18 10:48     ` Peter Zijlstra
2013-11-13 19:43     ` [tip:irq/urgent] " tip-bot for Thomas Gleixner

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