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authorDaniel Walker <dwalker@mvista.com>2008-02-06 01:37:41 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:08 -0800
commit6c6080f74c8d83a83a1e36bce803de15c0633898 (patch)
treefd017cd3697ca30a169572018e88bf628983509b /kernel/stop_machine.c
parentbcf11cbeccd7d981d68567942ba6ec184890bc29 (diff)
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>
Diffstat (limited to 'kernel/stop_machine.c')
-rw-r--r--kernel/stop_machine.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 51b5ee53571..6f4e0e13f70 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;
}