summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel/smp.c
diff options
context:
space:
mode:
authorToshi Kani <toshi.kani@hp.com>2013-09-25 15:08:27 -0600
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-09-30 19:55:51 +0200
commit6dedcca610c6d6189b4a54d32118d1654adb73d2 (patch)
tree981de5689216d41a594a1aea945fc48ab0fc888f /arch/powerpc/kernel/smp.c
parent1cad5e9a3978d182aa9b0e909fb0379da5ba45af (diff)
hotplug, powerpc, x86: Remove cpu_hotplug_driver_lock()
cpu_hotplug_driver_lock() serializes CPU online/offline operations when ARCH_CPU_PROBE_RELEASE is set. This lock interface is no longer necessary with the following reason: - lock_device_hotplug() now protects CPU online/offline operations, including the probe & release interfaces enabled by ARCH_CPU_PROBE_RELEASE. The use of cpu_hotplug_driver_lock() is redundant. - cpu_hotplug_driver_lock() is only valid when ARCH_CPU_PROBE_RELEASE is defined, which is misleading and is only enabled on powerpc. This patch removes the cpu_hotplug_driver_lock() interface. As a result, ARCH_CPU_PROBE_RELEASE only enables / disables the cpu probe & release interface as intended. There is no functional change in this patch. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch/powerpc/kernel/smp.c')
-rw-r--r--arch/powerpc/kernel/smp.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 8e59abc237d..930cd8af350 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -844,18 +844,6 @@ void __cpu_die(unsigned int cpu)
smp_ops->cpu_die(cpu);
}
-static DEFINE_MUTEX(powerpc_cpu_hotplug_driver_mutex);
-
-void cpu_hotplug_driver_lock()
-{
- mutex_lock(&powerpc_cpu_hotplug_driver_mutex);
-}
-
-void cpu_hotplug_driver_unlock()
-{
- mutex_unlock(&powerpc_cpu_hotplug_driver_mutex);
-}
-
void cpu_die(void)
{
if (ppc_md.cpu_die)