Thomas Gleixner 6ce47fd961 rtmutex: Warn if trylock is called from hard/softirq context ...

rt_mutex_trylock() must be called from thread context. It can be
called from atomic regions (preemption or interrupts disabled), but
not from hard/softirq/nmi context. Add a warning to alert abusers.

The reasons for this are:

    1) There is a potential deadlock in the slowpath

    2) Another cpu which blocks on the rtmutex will boost the task
       which allegedly locked the rtmutex, but that cannot work
       because the hard/softirq context borrows the task context.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sebastian Siewior <bigeasy@linutronix.de>

2015-05-13 22:49:12 +02:00

..

lglock.c

locking: Move the lglocks code to kernel/locking/

2013-11-06 09:24:20 +01:00

lockdep_internals.h

lockdep: Increase static allocations

2014-04-18 14:20:50 +02:00

lockdep_proc.c

lockdep/proc: Fix lock-time avg computation

2013-11-11 12:41:34 +01:00

lockdep_states.h

locking: Move the lockdep code to kernel/locking/

2013-11-06 07:55:08 +01:00

lockdep.c

lockdep: Make print_lock() robust against concurrent release

2015-04-17 09:42:14 +02:00

locktorture.c

locktorture: Cleanup header usage

2014-09-30 00:10:02 -07:00

Makefile

locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS

2015-05-12 09:46:00 +02:00

mcs_spinlock.h

locking/qspinlock: Introduce a simple generic 4-byte queued spinlock

2015-05-08 12:36:25 +02:00

mutex-debug.c

mutex: Always clear owner field upon mutex_unlock()

2015-01-09 11:20:39 +01:00

mutex-debug.h

locking: Move the mutex code to kernel/locking/

2013-11-06 07:55:07 +01:00

mutex.c

locking/mutex: Further simplify mutex_spin_on_owner()

2015-04-09 08:10:23 +02:00

mutex.h

locking/mutexes: Use MUTEX_SPIN_ON_OWNER when appropriate

2014-08-13 10:32:02 +02:00

osq_lock.c

locking: Remove ACCESS_ONCE() usage

2015-02-24 08:44:16 +01:00

percpu-rwsem.c

locking: Move the percpu-rwsem code to kernel/locking/

2013-11-06 09:24:22 +01:00

qrwlock.c

locking/qrwlock: Rename QUEUE_RWLOCK to QUEUED_RWLOCKS

2015-05-12 09:46:00 +02:00

qspinlock_paravirt.h

locking/pvqspinlock: Replace xchg() by the more descriptive set_mb()

2015-05-11 09:51:52 +02:00

qspinlock.c

locking/pvqspinlock: Implement simple paravirt support for the qspinlock

2015-05-08 12:37:05 +02:00

rtmutex_common.h

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rtmutex-debug.c

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rtmutex-debug.h

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rtmutex-tester.c

locking: Move the rtmutex code to kernel/locking/

2013-11-06 09:23:59 +01:00

rtmutex.c

rtmutex: Warn if trylock is called from hard/softirq context

2015-05-13 22:49:12 +02:00

rtmutex.h

rtmutex: Cleanup deadlock detector debug logic

2014-06-21 22:05:30 +02:00

rwsem-spinlock.c

locking/rwsem: Document barrier need when waking tasks

2015-02-18 16:57:10 +01:00

rwsem-xadd.c

locking/rwsem: Reduce spinlock contention in wakeup after up_read()/up_write()

2015-05-08 12:27:59 +02:00

rwsem.c

locking/rwsem: Set lock ownership ASAP

2015-02-18 16:57:13 +01:00

rwsem.h

locking/rwsem: Set lock ownership ASAP

2015-02-18 16:57:13 +01:00

semaphore.c

locking/semaphore: Resolve some shadow warnings

2014-09-04 07:17:24 +02:00

spinlock_debug.c

locking: Move the spinlock code to kernel/locking/

2013-11-06 07:55:21 +01:00

spinlock.c

spinlock: Add spin_lock_bh_nested()

2015-01-03 14:32:57 -05:00