cpu-hotplug: replace per-subsystem mutexes with get_online_cpus()

This patch converts the known per-subsystem mutexes to get_online_cpus
put_online_cpus. It also eliminates the CPU_LOCK_ACQUIRE and
CPU_LOCK_RELEASE hotplug notification events.

Signed-off-by: Gautham  R Shenoy <ego@in.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 3 deletions

diff --git a/include/linux/notifier.h b/include/linux/notifier.h
index 0c40cc0b4a36..5dfbc684ce7d 100644
--- a/include/linux/notifier.h
+++ b/include/linux/notifier.h
@@ -207,9 +207,7 @@ static inline int notifier_to_errno(int ret)
 #define CPU_DOWN_PREPARE        0x0005 /* CPU (unsigned)v going down */
 #define CPU_DOWN_FAILED         0x0006 /* CPU (unsigned)v NOT going down */
 #define CPU_DEAD                0x0007 /* CPU (unsigned)v dead */
-#define CPU_LOCK_ACQUIRE        0x0008 /* Acquire all hotcpu locks */
-#define CPU_LOCK_RELEASE        0x0009 /* Release all hotcpu locks */
-#define CPU_DYING               0x000A /* CPU (unsigned)v not running any task,
+#define CPU_DYING               0x0008 /* CPU (unsigned)v not running any task,
                                         * not handling interrupts, soon dead */
 
 /* Used for CPU hotplug events occuring while tasks are frozen due to a suspend