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| author | Ingo Molnar <mingo@elte.hu> | 2011-06-16 15:23:15 +0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-06-16 15:23:22 +0400 |
| commit | b4f9f2b64aa189c5584f266f4f0343af7a705441 (patch) | |
| tree | f410718bb93590ff61682b566c10f70d5883bbcd /drivers/oprofile/buffer_sync.c | |
| parent | 76369139ceb955deefc509e6e12ce9d6ce50ccab (diff) | |
| parent | 2c53b436a30867eb6b47dd7bab23ba638d1fb0d2 (diff) | |
| download | linux-b4f9f2b64aa189c5584f266f4f0343af7a705441.tar.xz | |
Merge commit 'v3.0-rc3' into perf/core
Merge reason: add the latest fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/oprofile/buffer_sync.c')
| -rw-r--r-- | drivers/oprofile/buffer_sync.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c index a3984f4ef192..f34b5b29fb95 100644 --- a/drivers/oprofile/buffer_sync.c +++ b/drivers/oprofile/buffer_sync.c @@ -141,6 +141,13 @@ static struct notifier_block module_load_nb = { .notifier_call = module_load_notify, }; +static void free_all_tasks(void) +{ + /* make sure we don't leak task structs */ + process_task_mortuary(); + process_task_mortuary(); +} + int sync_start(void) { int err; @@ -148,8 +155,6 @@ int sync_start(void) if (!zalloc_cpumask_var(&marked_cpus, GFP_KERNEL)) return -ENOMEM; - mutex_lock(&buffer_mutex); - err = task_handoff_register(&task_free_nb); if (err) goto out1; @@ -166,7 +171,6 @@ int sync_start(void) start_cpu_work(); out: - mutex_unlock(&buffer_mutex); return err; out4: profile_event_unregister(PROFILE_MUNMAP, &munmap_nb); @@ -174,6 +178,7 @@ out3: profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb); out2: task_handoff_unregister(&task_free_nb); + free_all_tasks(); out1: free_cpumask_var(marked_cpus); goto out; @@ -182,20 +187,16 @@ out1: void sync_stop(void) { - /* flush buffers */ - mutex_lock(&buffer_mutex); end_cpu_work(); unregister_module_notifier(&module_load_nb); profile_event_unregister(PROFILE_MUNMAP, &munmap_nb); profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb); task_handoff_unregister(&task_free_nb); - mutex_unlock(&buffer_mutex); - flush_cpu_work(); + barrier(); /* do all of the above first */ - /* make sure we don't leak task structs */ - process_task_mortuary(); - process_task_mortuary(); + flush_cpu_work(); + free_all_tasks(); free_cpumask_var(marked_cpus); } |