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

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Date:	Mon, 8 Apr 2013 13:27:18 -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, tglx@...utronix.de,
	magnus.damm@...il.com, rkuo@...eaurora.org
Subject: [tip:smp/hotplug] hexagon: Use generic idle loop

Commit-ID:  4e0fcc567239ef4b3f80bba778c30b0a4b624eff
Gitweb:     http://git.kernel.org/tip/4e0fcc567239ef4b3f80bba778c30b0a4b624eff
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 21 Mar 2013 22:49:46 +0100
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Mon, 8 Apr 2013 17:39:25 +0200

hexagon: 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>
Acked-by: Richard Kuo <rkuo@...eaurora.org>
Link: http://lkml.kernel.org/r/20130321215234.338692935@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/hexagon/Kconfig          |  1 +
 arch/hexagon/kernel/process.c | 23 +++--------------------
 arch/hexagon/kernel/smp.c     |  2 +-
 3 files changed, 5 insertions(+), 21 deletions(-)

diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
index e4decc6..6e3710e 100644
--- a/arch/hexagon/Kconfig
+++ b/arch/hexagon/Kconfig
@@ -24,6 +24,7 @@ config HEXAGON
 	select NO_IOPORT
 	select GENERIC_IOMAP
 	select GENERIC_SMP_IDLE_THREAD
+	select GENERIC_IDLE_LOOP
 	select STACKTRACE_SUPPORT
 	select KTIME_SCALAR
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index 06ae9ff..9b948c6 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -51,28 +51,11 @@ void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long sp)
  *  If hardware or VM offer wait termination even though interrupts
  *  are disabled.
  */
-static void default_idle(void)
+void arch_cpu_idle(void)
 {
 	__vmwait();
-}
-
-void (*idle_sleep)(void) = default_idle;
-
-void cpu_idle(void)
-{
-	while (1) {
-		tick_nohz_idle_enter();
-		local_irq_disable();
-		while (!need_resched()) {
-			idle_sleep();
-			/*  interrupts wake us up, but aren't serviced  */
-			local_irq_enable();	/* service interrupt   */
-			local_irq_disable();
-		}
-		local_irq_enable();
-		tick_nohz_idle_exit();
-		schedule();
-	}
+	/*  interrupts wake us up, but irqs are still disabled */
+	local_irq_enable();
 }
 
 /*
diff --git a/arch/hexagon/kernel/smp.c b/arch/hexagon/kernel/smp.c
index 8e095df..0e364ca 100644
--- a/arch/hexagon/kernel/smp.c
+++ b/arch/hexagon/kernel/smp.c
@@ -184,7 +184,7 @@ void __cpuinit start_secondary(void)
 
 	local_irq_enable();
 
-	cpu_idle();
+	cpu_startup_entry(CPUHP_ONLINE);
 }
 
 
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