linux-kernel - [tip:smp/hotplug] ia64: Remove unused cpu_idle

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Date:	Tue, 8 May 2012 05:29:27 -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,
	peterz@...radead.org, tony.luck@...el.com, tglx@...utronix.de
Subject: [tip:smp/hotplug] ia64: Remove unused cpu_idle_wait()

Commit-ID:  bbe78cbd729f85c4da6e04f45c8b2de43c3573f1
Gitweb:     http://git.kernel.org/tip/bbe78cbd729f85c4da6e04f45c8b2de43c3573f1
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 12:35:06 +0200

ia64: Remove unused cpu_idle_wait()

IA64 does not set CONFIG_ARCH_HAVE_IDLE_WAIT and cpuidle uses a
generic function now. Remove the unused code.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Tony Luck <tony.luck@...el.com>
Link: http://lkml.kernel.org/r/20120507175652.392394511@linutronix.de
---
 arch/ia64/include/asm/processor.h |    1 -
 arch/ia64/kernel/process.c        |   20 --------------------
 2 files changed, 0 insertions(+), 21 deletions(-)

diff --git a/arch/ia64/include/asm/processor.h b/arch/ia64/include/asm/processor.h
index 483f6c6..f92f67a 100644
--- a/arch/ia64/include/asm/processor.h
+++ b/arch/ia64/include/asm/processor.h
@@ -723,7 +723,6 @@ extern unsigned long boot_option_idle_override;
 enum idle_boot_override {IDLE_NO_OVERRIDE=0, IDLE_HALT, IDLE_FORCE_MWAIT,
 			 IDLE_NOMWAIT, IDLE_POLL};
 
-void cpu_idle_wait(void);
 void default_idle(void);
 
 #define ia64_platform_is(x) (strcmp(x, platform_name) == 0)
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index ce74e14..5e0e86d 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -273,26 +273,6 @@ static inline void play_dead(void)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static void do_nothing(void *unused)
-{
-}
-
-/*
- * cpu_idle_wait - Used to ensure that all the CPUs discard old value of
- * pm_idle and update to new pm_idle value. Required while changing pm_idle
- * handler on SMP systems.
- *
- * Caller must have changed pm_idle to the new value before the call. Old
- * pm_idle value will not be used by any CPU after the return of this function.
- */
-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);
-
 void __attribute__((noreturn))
 cpu_idle (void)
 {
--
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