From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 21 Mar 2013 21:49:44 +0000 (+0100)
Subject: frv: Use generic idle loop
X-Git-Tag: v3.10-rc1~172^2~26
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ccf8e78fe2a7e92b6d43de8023786b9dd199aab1;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

frv: 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: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20130321215234.217235264@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 2ce731f..0d998db 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -8,6 +8,7 @@ config FRV
 	select HAVE_GENERIC_HARDIRQS
 	select VIRT_TO_BUS
 	select GENERIC_IRQ_SHOW
+	select GENERIC_IDLE_LOOP
 	select HAVE_DEBUG_BUGVERBOSE
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG
 	select GENERIC_CPU_DEVICES
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index 23916b2..5d40aeb77 100644
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -59,29 +59,12 @@ static void core_sleep_idle(void)
 	mb();
 }
 
-void (*idle)(void) = core_sleep_idle;
-
-/*
- * 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)
+void arch_cpu_idle(void)
 {
-	/* endless idle loop with no priority at all */
-	while (1) {
-		rcu_idle_enter();
-		while (!need_resched()) {
-			check_pgt_cache();
-
-			if (!frv_dma_inprogress && idle)
-				idle();
-		}
-		rcu_idle_exit();
-
-		schedule_preempt_disabled();
-	}
+	if (!frv_dma_inprogress)
+		core_sleep_idle();
+	else
+		local_irq_enable();
 }
 
 void machine_restart(char * __unused)