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>

3 files changed, 2 insertions, 74 deletions

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index 9ab3bf2eca8d..e111b5200cd9 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 35f92ce51c24..ec6d9d37cefd 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 5e8a3b6d6bc6..000000000000
--- 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();
-        }
-}