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 <j...@joshtriplett.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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