From: Steven Rostedt <rostedt@xxxxxxxxxxx> When taking the pi_lock, we must disable interrupts because the pi_lock can also be taken in an interrupt handler. Use raw_spin_lock_irq() instead of raw_spin_lock(). Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Cc: Carsten Emde <C.Emde@xxxxxxxxx> Cc: John Kacur <jkacur@xxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Clark Williams <clark.williams@xxxxxxxxx> Cc: stable-rt@xxxxxxxxxxxxxxx Link: http://lkml.kernel.org/r/20120301190345.165160680@xxxxxxxxxxx Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- kernel/rtmutex.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/rtmutex.c b/kernel/rtmutex.c index 789744a..a02fbd9 100644 --- a/kernel/rtmutex.c +++ b/kernel/rtmutex.c @@ -1365,14 +1365,14 @@ int rt_mutex_start_proxy_lock(struct rt_mutex *lock, * PI_REQUEUE_INPROGRESS, so that if the task is waking up * it will know that we are in the process of requeuing it. */ - raw_spin_lock(&task->pi_lock); + raw_spin_lock_irq(&task->pi_lock); if (task->pi_blocked_on) { - raw_spin_unlock(&task->pi_lock); + raw_spin_unlock_irq(&task->pi_lock); raw_spin_unlock(&lock->wait_lock); return -EAGAIN; } task->pi_blocked_on = PI_REQUEUE_INPROGRESS; - raw_spin_unlock(&task->pi_lock); + raw_spin_unlock_irq(&task->pi_lock); #endif ret = task_blocks_on_rt_mutex(lock, waiter, task, detect_deadlock); -- 1.7.8.3 -- To unsubscribe from this list: send the line "unsubscribe stable-rt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
