Subject: rtmutex: Add rtmutex_lock_killable() From: Thomas Gleixner Date: Thu, 09 Jun 2011 11:43:52 +0200 Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.1-rt3.tar.xz Add "killable" type to rtmutex. We need this since rtmutex are used as "normal" mutexes which do use this type. Signed-off-by: Thomas Gleixner --- include/linux/rtmutex.h | 1 + kernel/locking/rtmutex.c | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) --- a/include/linux/rtmutex.h +++ b/include/linux/rtmutex.h @@ -115,6 +115,7 @@ extern void rt_mutex_lock(struct rt_mute #endif extern int rt_mutex_lock_interruptible(struct rt_mutex *lock); +extern int rt_mutex_lock_killable(struct rt_mutex *lock); extern int rt_mutex_timed_lock(struct rt_mutex *lock, struct hrtimer_sleeper *timeout); --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -1563,6 +1563,25 @@ int __sched __rt_mutex_futex_trylock(str } /** + * rt_mutex_lock_killable - lock a rt_mutex killable + * + * @lock: the rt_mutex to be locked + * @detect_deadlock: deadlock detection on/off + * + * Returns: + * 0 on success + * -EINTR when interrupted by a signal + * -EDEADLK when the lock would deadlock (when deadlock detection is on) + */ +int __sched rt_mutex_lock_killable(struct rt_mutex *lock) +{ + might_sleep(); + + return rt_mutex_fastlock(lock, TASK_KILLABLE, rt_mutex_slowlock); +} +EXPORT_SYMBOL_GPL(rt_mutex_lock_killable); + +/** * rt_mutex_timed_lock - lock a rt_mutex interruptible * the timeout structure is provided * by the caller