stopmachine: semaphore to mutex

[akpm@linux-foundation.org: cleanup]
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 51b5ee53571a..6f4e0e13f70c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -29,7 +29,6 @@ enum stopmachine_state {
 static enum stopmachine_state stopmachine_state;
 static unsigned int stopmachine_num_threads;
 static atomic_t stopmachine_thread_ack;
-static DECLARE_MUTEX(stopmachine_mutex);
 
 static int stopmachine(void *cpu)
 {
@@ -170,6 +169,7 @@ static int do_stop(void *_smdata)
 struct task_struct *__stop_machine_run(int (*fn)(void *), void *data,
                                        unsigned int cpu)
 {
+        static DEFINE_MUTEX(stopmachine_mutex);
         struct stop_machine_data smdata;
         struct task_struct *p;
 
@@ -177,7 +177,7 @@ struct task_struct *__stop_machine_run(int (*fn)(void *), void *data,
         smdata.data = data;
         init_completion(&smdata.done);
 
-        down(&stopmachine_mutex);
+        mutex_lock(&stopmachine_mutex);
 
         /* If they don't care which CPU fn runs on, bind to any online one. */
         if (cpu == NR_CPUS)
@@ -193,7 +193,7 @@ struct task_struct *__stop_machine_run(int (*fn)(void *), void *data,
                 wake_up_process(p);
                 wait_for_completion(&smdata.done);
         }
-        up(&stopmachine_mutex);
+        mutex_unlock(&stopmachine_mutex);
         return p;
 }