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Commit 6862c05c authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

openrisc: Use generic idle loop 



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

Signed-off-by: default avatarThomas 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: default avatarCc: 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent af695cd9

arch/openrisc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/openrisc/kernel/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

arch/openrisc/kernel/idle.c

deleted100644 → 0
+0 −73
Original line number Diff line number Diff line 
/*

 * 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();

	}

}