m32r: Use generic idle loop

Replace the private poller.

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>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Link: http://lkml.kernel.org/r/20130321215234.470547189@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
index bcd17b2..af814fe 100644 (file)
--- a/arch/m32r/Kconfig
+++ b/arch/m32r/Kconfig
@@ -13,6 +13,7 @@ config M32R
        select VIRT_TO_BUS
        select GENERIC_IRQ_PROBE
        select GENERIC_IRQ_SHOW
+       select GENERIC_IDLE_LOOP
        select GENERIC_ATOMIC64
        select ARCH_USES_GETTIMEOFFSET
        select MODULES_USE_ELF_RELA

diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c
index bde899e..e2d0490 100644 (file)
--- a/arch/m32r/kernel/process.c
+++ b/arch/m32r/kernel/process.c
@@ -47,24 +47,6 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
 void (*pm_power_off)(void) = NULL;
 EXPORT_SYMBOL(pm_power_off);
 
-/*
- * The idle thread. There's no useful work to be
- * done, so just try to conserve power and have a
- * low exit latency (ie sit in a loop waiting for
- * somebody to say that they'd like to reschedule)
- */
-void cpu_idle (void)
-{
-       /* endless idle loop with no priority at all */
-       while (1) {
-               rcu_idle_enter();
-               while (!need_resched())
-                       cpu_relax();
-               rcu_idle_exit();
-               schedule_preempt_disabled();
-       }
-}
-
 void machine_restart(char *__unused)
 {
 #if defined(CONFIG_PLAT_MAPPI3)

diff --git a/arch/m32r/kernel/smpboot.c b/arch/m32r/kernel/smpboot.c
index 13168a7..0ac558a 100644 (file)
--- a/arch/m32r/kernel/smpboot.c
+++ b/arch/m32r/kernel/smpboot.c
@@ -432,7 +432,7 @@ int __init start_secondary(void *unused)
         */
        local_flush_tlb_all();
 
-       cpu_idle();
+       cpu_startup_entry(CPUHP_ONLINE);
        return 0;
 }