diff options
author | Grant Likely <grant.likely@secretlab.ca> | 2011-06-17 18:32:26 +0400 |
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committer | Grant Likely <grant.likely@secretlab.ca> | 2011-06-17 18:32:26 +0400 |
commit | f8db4cc4f2b11bdded6c94f0d55906847474b982 (patch) | |
tree | d1b99d186edb9d203fafd896f19487125a2395af /drivers/oprofile | |
parent | 2e2de2e314672c8b6644f67a35556d6df780493d (diff) | |
parent | e479c60456ef22b0869432887216186aabaed086 (diff) | |
download | linux-f8db4cc4f2b11bdded6c94f0d55906847474b982.tar.xz |
Merge branch 'spi/merge' into spi/next
Diffstat (limited to 'drivers/oprofile')
-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); } |