46 lines
1.9 KiB
Diff
46 lines
1.9 KiB
Diff
From 309789b8125b7eee6fd1c3a4716fcb6ea1ad32ba Mon Sep 17 00:00:00 2001
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Fri, 21 Oct 2016 10:29:11 +0200
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Subject: [PATCH] x86/apic: get rid of "warning: 'acpi_ioapic_lock' defined but
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not used"
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.8/older/patches-4.8.6-rt5.tar.xz
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kbuild test robot reported this against the -RT tree:
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| In file included from include/linux/mutex.h:30:0,
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| from include/linux/notifier.h:13,
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| from include/linux/memory_hotplug.h:6,
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| from include/linux/mmzone.h:777,
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| from include/linux/gfp.h:5,
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| from include/linux/slab.h:14,
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| from include/linux/resource_ext.h:19,
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| from include/linux/acpi.h:26,
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| from arch/x86/kernel/acpi/boot.c:27:
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|>> arch/x86/kernel/acpi/boot.c:90:21: warning: 'acpi_ioapic_lock' defined but not used [-Wunused-variable]
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| static DEFINE_MUTEX(acpi_ioapic_lock);
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| ^
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| include/linux/mutex_rt.h:27:15: note: in definition of macro 'DEFINE_MUTEX'
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| struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
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^~~~~~~~~
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which is also true (as in non-used) for !RT but the compiler does not
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emit a warning.
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Reported-by: kbuild test robot <fengguang.wu@intel.com>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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arch/x86/kernel/acpi/boot.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/arch/x86/kernel/acpi/boot.c
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+++ b/arch/x86/kernel/acpi/boot.c
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@@ -87,7 +87,9 @@ static u64 acpi_lapic_addr __initdata =
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* ->ioapic_mutex
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* ->ioapic_lock
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*/
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+#ifdef CONFIG_X86_IO_APIC
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static DEFINE_MUTEX(acpi_ioapic_lock);
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+#endif
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/* --------------------------------------------------------------------------
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Boot-time Configuration
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