linux-kernel - [PATCH 11 of 38] x86: define no-op exit

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Date:	Thu, 13 Nov 2008 11:10:09 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Xen-devel <xen-devel@...ts.xensource.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ian Campbell <ian.campbell@...rix.com>
Subject: [PATCH 11 of 38] x86: define no-op exit_idle() on 32-bit

exit_idle() is only used on 64-bit, but define a noop version on
32-bit to allow subsequent unification.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
---
 arch/x86/include/asm/idle.h |   10 ++++++++++
 arch/x86/kernel/apic.c      |    7 +------
 arch/x86/kernel/io_apic.c   |    2 --
 3 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/idle.h b/arch/x86/include/asm/idle.h
--- a/arch/x86/include/asm/idle.h
+++ b/arch/x86/include/asm/idle.h
@@ -8,8 +8,18 @@
 void idle_notifier_register(struct notifier_block *n);
 void idle_notifier_unregister(struct notifier_block *n);
 
+#ifdef CONFIG_X86_64
 void enter_idle(void);
 void exit_idle(void);
+#else
+static inline void enter_idle(void)
+{
+}
+
+static inline void exit_idle(void)
+{
+}
+#endif	/* CONFIG_X86_64 */
 
 void c1e_remove_cpu(int cpu);
 
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -808,9 +808,8 @@
 	 * Besides, if we don't timer interrupts ignore the global
 	 * interrupt lock, which is the WrongThing (tm) to do.
 	 */
-#ifdef CONFIG_X86_64
 	exit_idle();
-#endif
+
 	irq_enter();
 	local_apic_timer_interrupt();
 	irq_exit();
@@ -1668,9 +1667,7 @@
 {
 	u32 v;
 
-#ifdef CONFIG_X86_64
 	exit_idle();
-#endif
 	irq_enter();
 	/*
 	 * Check if this really is a spurious interrupt and ACK it
@@ -1699,9 +1696,7 @@
 {
 	u32 v, v1;
 
-#ifdef CONFIG_X86_64
 	exit_idle();
-#endif
 	irq_enter();
 	/* First tickle the hardware, only then report what went on. -- REW */
 	v = apic_read(APIC_ESR);
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2242,9 +2242,7 @@
 {
 	unsigned vector, me;
 	ack_APIC_irq();
-#ifdef CONFIG_X86_64
 	exit_idle();
-#endif
 	irq_enter();
 
 	me = smp_processor_id();


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