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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 /include/linux/cpu.h
parent1cad5e9a3978d182aa9b0e909fb0379da5ba45af (diff)
downloadop-kernel-dev-6dedcca610c6d6189b4a54d32118d1654adb73d2.zip
op-kernel-dev-6dedcca610c6d6189b4a54d32118d1654adb73d2.tar.gz
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 'include/linux/cpu.h')
-rw-r--r--include/linux/cpu.h13
1 files changed, 0 insertions, 13 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 801ff9e..3434ef7 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -185,19 +185,6 @@ extern void cpu_hotplug_enable(void);
void clear_tasks_mm_cpumask(int cpu);
int cpu_down(unsigned int cpu);
-#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
-extern void cpu_hotplug_driver_lock(void);
-extern void cpu_hotplug_driver_unlock(void);
-#else
-static inline void cpu_hotplug_driver_lock(void)
-{
-}
-
-static inline void cpu_hotplug_driver_unlock(void)
-{
-}
-#endif
-
#else /* CONFIG_HOTPLUG_CPU */
static inline void cpu_hotplug_begin(void) {}
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