linux-kernel - [tip:smp/hotplug] powerpc: Remove unused cpu_idle

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Message-ID: <tip-c9b92b840705542a1ae50b5407154a5595d17359@git.kernel.org>
Date:	Tue, 8 May 2012 05:30:17 -0700
From:	tip-bot for Thomas Gleixner <tglx@...utronix.de>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	benh@...nel.crashing.org, peterz@...radead.org, tglx@...utronix.de
Subject: [tip:smp/hotplug] powerpc: Remove unused cpu_idle_wait()

Commit-ID:  c9b92b840705542a1ae50b5407154a5595d17359
Gitweb:     http://git.kernel.org/tip/c9b92b840705542a1ae50b5407154a5595d17359
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Mon, 7 May 2012 17:59:50 +0000
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 8 May 2012 12:35:07 +0200

powerpc: Remove unused cpu_idle_wait()

cpuidle uses a generic function now. Remove the cruft.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Link: http://lkml.kernel.org/r/20120507175652.330322737@linutronix.de
---
 arch/powerpc/Kconfig                 |    4 ----
 arch/powerpc/include/asm/processor.h |    1 -
 arch/powerpc/kernel/idle.c           |   19 -------------------
 3 files changed, 0 insertions(+), 24 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c815535..296e4f9 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -87,10 +87,6 @@ config ARCH_HAS_ILOG2_U64
 	bool
 	default y if 64BIT
 
-config ARCH_HAS_CPU_IDLE_WAIT
-	bool
-	default y
-
 config GENERIC_HWEIGHT
 	bool
 	default y
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index 8e2d037..48a26d3 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -386,7 +386,6 @@ extern unsigned long cpuidle_disable;
 enum idle_boot_override {IDLE_NO_OVERRIDE = 0, IDLE_POWERSAVE_OFF};
 
 extern int powersave_nap;	/* set if nap mode can be used in idle loop */
-void cpu_idle_wait(void);
 
 #ifdef CONFIG_PSERIES_IDLE
 extern void update_smt_snooze_delay(int snooze);
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 04d7909..2099d9a 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -113,25 +113,6 @@ void cpu_idle(void)
 	}
 }
 
-static void do_nothing(void *unused)
-{
-}
-
-/*
- * cpu_idle_wait - Used to ensure that all the CPUs come out of the old
- * idle loop and start using the new idle loop.
- * Required while changing idle handler on SMP systems.
- * Caller must have changed idle handler to the new value before the call.
- * This window may be larger on shared systems.
- */
-void cpu_idle_wait(void)
-{
-	smp_mb();
-	/* kick all the CPUs so that they exit out of pm_idle */
-	smp_call_function(do_nothing, NULL, 1);
-}
-EXPORT_SYMBOL_GPL(cpu_idle_wait);
-
 int powersave_nap;
 
 #ifdef CONFIG_SYSCTL
--
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