rt-patches/0364-x86-apic-get-rid-of-warning-acpi_ioapic_lock-defined.patch

   1 From 8a7ce2cb5c7971826fb93362e2562224d9d5b205 Mon Sep 17 00:00:00 2001
   2 From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
   3 Date: Fri, 21 Oct 2016 10:29:11 +0200
   4 Subject: [PATCH 364/366] x86/apic: get rid of "warning: 'acpi_ioapic_lock'
   5  defined but not used"
   6
   7 kbuild test robot reported this against the -RT tree:
   8
   9 |   In file included from include/linux/mutex.h:30:0,
  10 |                    from include/linux/notifier.h:13,
  11 |                    from include/linux/memory_hotplug.h:6,
  12 |                    from include/linux/mmzone.h:777,
  13 |                    from include/linux/gfp.h:5,
  14 |                    from include/linux/slab.h:14,
  15 |                    from include/linux/resource_ext.h:19,
  16 |                    from include/linux/acpi.h:26,
  17 |                    from arch/x86/kernel/acpi/boot.c:27:
  18 |>> arch/x86/kernel/acpi/boot.c:90:21: warning: 'acpi_ioapic_lock' defined but not used [-Wunused-variable]
  19 |    static DEFINE_MUTEX(acpi_ioapic_lock);
  20 |                        ^
  21 |   include/linux/mutex_rt.h:27:15: note: in definition of macro 'DEFINE_MUTEX'
  22 |     struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
  23                   ^~~~~~~~~
  24 which is also true (as in non-used) for !RT but the compiler does not
  25 emit a warning.
  26
  27 Reported-by: kbuild test robot <fengguang.wu@intel.com>
  28 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  29 Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
  30 ---
  31  arch/x86/kernel/acpi/boot.c | 2 ++
  32  1 file changed, 2 insertions(+)
  33
  34 diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
  35 index e759076..a29fc4f 100644
  36 --- a/arch/x86/kernel/acpi/boot.c
  37 +++ b/arch/x86/kernel/acpi/boot.c
  38 @@ -87,7 +87,9 @@ static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
  39   *             ->ioapic_mutex
  40   *                     ->ioapic_lock
  41   */
  42 +#ifdef CONFIG_X86_IO_APIC
  43  static DEFINE_MUTEX(acpi_ioapic_lock);
  44 +#endif
  45
  46  /* --------------------------------------------------------------------------
  47                                Boot-time Configuration
  48 --
  49 1.9.1
  50