xtensa: Use generic idle loop

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: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Acked-by: Chris Zankel <chris@zankel.net>
Link: http://lkml.kernel.org/r/20130321215235.546600507@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

2 files changed, 3 insertions, 12 deletions

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index b09de49dbec5..e0144ff4624d 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -19,6 +19,7 @@ config XTENSA
         select CLONE_BACKWARDS
         select IRQ_DOMAIN
         select HAVE_OPROFILE
+        select GENERIC_IDLE_LOOP
         help
           Xtensa processors are 32-bit RISC machines designed by Tensilica
           primarily for embedded systems.  These processors are both
diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 5cd82e9f601c..1c85323f01d7 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -105,19 +105,9 @@ void coprocessor_flush_all(struct thread_info *ti)
 /*
  * Powermanagement idle function, if any is provided by the platform.
  */
-
-void cpu_idle(void)
+void arch_cpu_idle(void)
 {
-        local_irq_enable();
-
-        /* endless idle loop with no priority at all */
-        while (1) {
-                rcu_idle_enter();
-                while (!need_resched())
-                        platform_idle();
-                rcu_idle_exit();
-                schedule_preempt_disabled();
-        }
+        platform_idle();
 }
 
 /*