diff options
Diffstat (limited to 'kernel/smpboot.c')
| -rw-r--r-- | kernel/smpboot.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/kernel/smpboot.c b/kernel/smpboot.c index 8eaed9aa9cf..02fc5c93367 100644 --- a/kernel/smpboot.c +++ b/kernel/smpboot.c @@ -185,8 +185,18 @@ __smpboot_create_thread(struct smp_hotplug_thread *ht, unsigned int cpu) } get_task_struct(tsk); *per_cpu_ptr(ht->store, cpu) = tsk; - if (ht->create) - ht->create(cpu); + if (ht->create) { + /* + * Make sure that the task has actually scheduled out + * into park position, before calling the create + * callback. At least the migration thread callback + * requires that the task is off the runqueue. + */ + if (!wait_task_inactive(tsk, TASK_PARKED)) + WARN_ON(1); + else + ht->create(cpu); + } return 0; } |