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| author | Daniel Walker <dwalker@mvista.com> | 2008-02-06 01:37:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:08 -0800 |
| commit | 6c6080f74c8d83a83a1e36bce803de15c0633898 (patch) | |
| tree | fd017cd3697ca30a169572018e88bf628983509b /kernel/stop_machine.c | |
| parent | bcf11cbeccd7d981d68567942ba6ec184890bc29 (diff) | |
| download | lwn-6c6080f74c8d83a83a1e36bce803de15c0633898.tar.gz lwn-6c6080f74c8d83a83a1e36bce803de15c0633898.zip | |
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.c | 6 |
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; } |