linux-kernel - [tip:smp/hotplug] frv: Use generic idle loop

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Date:	Mon, 8 Apr 2013 13:24:54 -0700
From:	tip-bot for Thomas Gleixner <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	rusty@...tcorp.com.au, torvalds@...ux-foundation.org,
	peterz@...radead.org, srivatsa.bhat@...ux.vnet.ibm.com,
	paulmck@...ux.vnet.ibm.com, dhowells@...hat.com,
	tglx@...utronix.de, magnus.damm@...il.com
Subject: [tip:smp/hotplug] frv: Use generic idle loop

Commit-ID:  ccf8e78fe2a7e92b6d43de8023786b9dd199aab1
Gitweb:     http://git.kernel.org/tip/ccf8e78fe2a7e92b6d43de8023786b9dd199aab1
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:44 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:25 +0200

frv: Use generic idle loop

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Rusty Russell <rusty@...tcorp.com.au>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@...ux.vnet.ibm.com>
Cc: Magnus Damm <magnus.damm@...il.com>
Cc: David Howells <dhowells@...hat.com>
Link: http://lkml.kernel.org/r/20130321215234.217235264@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/frv/Kconfig          |  1 +
 arch/frv/kernel/process.c | 27 +++++----------------------
 2 files changed, 6 insertions(+), 22 deletions(-)

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)
--
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