[patch 24/34] openrisc: Use generic idle loop

Thomas Gleixner
2013-03-21T21:57:01Z

[-- Attachment #1: openrisc-use-generic-idle-loop.patch --]
[-- Type: text/plain, Size: 2786 bytes --]

Idle poller with an extra check_pgt_cache() invocation. Use the core
code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/openrisc/Kconfig | 1
arch/openrisc/kernel/idle.c | 73 --------------------------------------------
2 files changed, 1 insertion(+), 73 deletions(-)

Index: linux-2.6/arch/openrisc/Kconfig
===================================================================
--- linux-2.6.orig/arch/openrisc/Kconfig
+++ linux-2.6/arch/openrisc/Kconfig
@@ -21,6 +21,7 @@ config OPENRISC
select GENERIC_CLOCKEVENTS
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
+ select GENERIC_IDLE_LOOP
select MODULES_USE_ELF_RELA

config MMU
Index: linux-2.6/arch/openrisc/kernel/idle.c
===================================================================
--- linux-2.6.orig/arch/openrisc/kernel/idle.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/*
- * OpenRISC idle.c
- *
- * Linux architectural port borrowing liberally from similar works of
- * others. All original copyrights apply as per the original source
- * declaration.
- *
- * Modifications for the OpenRISC architecture:
- * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
- * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * Idle daemon for or32. Idle daemon will handle any action
- * that needs to be taken when the system becomes idle.
- */
-
-#include <linux/errno.h>
-#include <linux/sched.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/tick.h>
-
-#include <asm/pgtable.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
-#include <asm/processor.h>
-#include <asm/mmu.h>
-#include <asm/cache.h>
-#include <asm/pgalloc.h>
-
-void (*powersave) (void) = NULL;
-
-void cpu_idle(void)
-{
- set_thread_flag(TIF_POLLING_NRFLAG);
-
- /* endless idle loop with no priority at all */
- while (1) {
- tick_nohz_idle_enter();
- rcu_idle_enter();
-
- while (!need_resched()) {
- check_pgt_cache();
- rmb();
-
- clear_thread_flag(TIF_POLLING_NRFLAG);
-
- local_irq_disable();
- /* Don't trace irqs off for idle */
- stop_critical_timings();
- if (!need_resched() && powersave != NULL)
- powersave();
- start_critical_timings();
- local_irq_enable();
- set_thread_flag(TIF_POLLING_NRFLAG);
- }
-
- rcu_idle_exit();
- tick_nohz_idle_exit();
- preempt_enable_no_resched();
- schedule();
- preempt_disable();
- }
-}