linux-kernel - [PATCH 28/58] x86: io_apic: Don't define acpi_get_override_irq if CONFIG

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Date:	Sun, 18 Nov 2012 21:28:07 -0800
From:	Josh Triplett <josh@...htriplett.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Joerg Roedel <joerg.roedel@....com>,
	Yinghai Lu <yinghai@...nel.org>,
	Alexander Gordeev <agordeev@...hat.com>,
	linux-kernel@...r.kernel.org
Cc:	Josh Triplett <josh@...htriplett.org>
Subject: [PATCH 28/58] x86: io_apic: Don't define acpi_get_override_irq if CONFIG_ACPI=n

arch/x86/kernel/apic/io_apic.c defines acpi_get_override_irq
unconditionally, but linux/acpi.h only prototypes it if CONFIG_ACPI=y,
and nothing calls it unless CONFIG_ACPI=y.  Make the definition itself
conditional on CONFIG_ACPI.  This saves space when CONFIG_ACPI=n, and
eliminates warnings from GCC (-Wmissing-prototypes) and Sparse (-Wdecl).

arch/x86/kernel/apic/io_apic.c:3638:5: warning: no previous prototype for ‘acpi_get_override_irq’ [-Wmissing-prototypes]

Signed-off-by: Josh Triplett <josh@...htriplett.org>
---
 arch/x86/kernel/apic/io_apic.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 1817fa9..6d01108 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3635,6 +3635,7 @@ static int __init io_apic_get_version(int ioapic)
 	return reg_01.bits.version;
 }
 
+#ifdef CONFIG_ACPI
 int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity)
 {
 	int ioapic, pin, idx;
@@ -3658,6 +3659,7 @@ int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity)
 	*polarity = irq_polarity(idx);
 	return 0;
 }
+#endif
 
 /*
  * This function currently is only a helper for the i386 smp boot process where
-- 
1.7.10.4

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