Messages in this thread Patch in this message |  | | Date | Sun, 30 Oct 2016 12:45:11 -0400 | From | Steven Rostedt <> | Subject | [PATCH RT 4/6] x86/apic: get rid of "warning: acpi_ioapic_lock defined but not used" |
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4.4.27-rt38-rc1 stable review patch. If anyone has any objections, please let me know.
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
kbuild test robot reported this against the -RT tree:
| In file included from include/linux/mutex.h:30:0, | from include/linux/notifier.h:13, | from include/linux/memory_hotplug.h:6, | from include/linux/mmzone.h:777, | from include/linux/gfp.h:5, | from include/linux/slab.h:14, | from include/linux/resource_ext.h:19, | from include/linux/acpi.h:26, | from arch/x86/kernel/acpi/boot.c:27: |>> arch/x86/kernel/acpi/boot.c:90:21: warning: 'acpi_ioapic_lock' defined but not used [-Wunused-variable] | static DEFINE_MUTEX(acpi_ioapic_lock); | ^ | include/linux/mutex_rt.h:27:15: note: in definition of macro 'DEFINE_MUTEX' | struct mutex mutexname = __MUTEX_INITIALIZER(mutexname) ^~~~~~~~~ which is also true (as in non-used) for !RT but the compiler does not emit a warning.
Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> --- arch/x86/kernel/acpi/boot.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index e75907601a41..a29fc4f84fc4 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -87,7 +87,9 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; * ->ioapic_mutex * ->ioapic_lock */ +#ifdef CONFIG_X86_IO_APIC static DEFINE_MUTEX(acpi_ioapic_lock); +#endif /* -------------------------------------------------------------------------- Boot-time Configuration -- 2.9.3
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