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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>
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3 changed files with 2 additions and 74 deletions
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@ -21,6 +21,7 @@ config OPENRISC
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select GENERIC_CLOCKEVENTS
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select GENERIC_STRNCPY_FROM_USER
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select GENERIC_STRNLEN_USER
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select GENERIC_IDLE_LOOP
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select MODULES_USE_ELF_RELA
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config MMU
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@ -4,7 +4,7 @@
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extra-y := head.o vmlinux.lds
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obj-y := setup.o idle.o or32_ksyms.o process.o dma.o \
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obj-y := setup.o or32_ksyms.o process.o dma.o \
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traps.o time.o irq.o entry.o ptrace.o signal.o \
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sys_call_table.o
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@ -1,73 +0,0 @@
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/*
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* OpenRISC idle.c
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*
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* Linux architectural port borrowing liberally from similar works of
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* others. All original copyrights apply as per the original source
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* declaration.
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*
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* Modifications for the OpenRISC architecture:
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* Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
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* Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Idle daemon for or32. Idle daemon will handle any action
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* that needs to be taken when the system becomes idle.
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*/
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/tick.h>
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#include <asm/pgtable.h>
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#include <asm/uaccess.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/mmu.h>
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#include <asm/cache.h>
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#include <asm/pgalloc.h>
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void (*powersave) (void) = NULL;
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void cpu_idle(void)
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{
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set_thread_flag(TIF_POLLING_NRFLAG);
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/* endless idle loop with no priority at all */
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while (1) {
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tick_nohz_idle_enter();
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rcu_idle_enter();
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while (!need_resched()) {
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check_pgt_cache();
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rmb();
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clear_thread_flag(TIF_POLLING_NRFLAG);
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local_irq_disable();
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/* Don't trace irqs off for idle */
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stop_critical_timings();
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if (!need_resched() && powersave != NULL)
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powersave();
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start_critical_timings();
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local_irq_enable();
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set_thread_flag(TIF_POLLING_NRFLAG);
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}
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rcu_idle_exit();
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tick_nohz_idle_exit();
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preempt_enable_no_resched();
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schedule();
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preempt_disable();
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}
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}
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