[tip:smp/hotplug] openrisc: Use generic idle loop

tip-bot for Thomas Gleixner
2013-04-08T20:37:24Z

Commit-ID: 6862c05ce4bc59ac52165df66f2a55ad692ef941
Gitweb: http://git.kernel.org/tip/6862c05ce4bc59ac52165df66f2a55ad692ef941
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:54 +0100
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:27 +0200

openrisc: Use generic idle loop

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Link: http://lkml.kernel.org/r/20130321215234.886530981@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/openrisc/Kconfig | 1 +
arch/openrisc/kernel/Makefile | 2 +-
arch/openrisc/kernel/idle.c | 73 -------------------------------------------
3 files changed, 2 insertions(+), 74 deletions(-)

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 9ab3bf2..e111b52 100644
--- a/arch/openrisc/Kconfig
+++ b/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
diff --git a/arch/openrisc/kernel/Makefile b/arch/openrisc/kernel/Makefile
index 35f92ce..ec6d9d3 100644
--- a/arch/openrisc/kernel/Makefile
+++ b/arch/openrisc/kernel/Makefile
@@ -4,7 +4,7 @@

extra-y := head.o vmlinux.lds

-obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \
+obj-y := setup.o or32_ksyms.o process.o dma.o \
traps.o time.o irq.o entry.o ptrace.o signal.o \
sys_call_table.o

diff --git a/arch/openrisc/kernel/idle.c b/arch/openrisc/kernel/idle.c
deleted file mode 100644
index 5e8a3b6..0000000
--- a/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();
- }
-}