64 lines
2.2 KiB
Diff
64 lines
2.2 KiB
Diff
From bea8b6bd7eb5c825f9bda45b062e7f646eb96514 Mon Sep 17 00:00:00 2001
|
|
Message-Id: <bea8b6bd7eb5c825f9bda45b062e7f646eb96514.1601675152.git.zanussi@kernel.org>
|
|
In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
|
|
References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
|
|
From: Thomas Gleixner <tglx@linutronix.de>
|
|
Date: Thu, 9 Jun 2011 11:43:52 +0200
|
|
Subject: [PATCH 135/333] rtmutex: Add rtmutex_lock_killable()
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.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 <tglx@linutronix.de>
|
|
---
|
|
include/linux/rtmutex.h | 1 +
|
|
kernel/locking/rtmutex.c | 19 +++++++++++++++++++
|
|
2 files changed, 20 insertions(+)
|
|
|
|
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
|
|
index 6fd615a0eea9..81ece6a8291a 100644
|
|
--- a/include/linux/rtmutex.h
|
|
+++ b/include/linux/rtmutex.h
|
|
@@ -115,6 +115,7 @@ extern void rt_mutex_lock(struct rt_mutex *lock);
|
|
#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);
|
|
|
|
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
|
|
index 1c3f56d3d9b6..a4b2af7718f8 100644
|
|
--- a/kernel/locking/rtmutex.c
|
|
+++ b/kernel/locking/rtmutex.c
|
|
@@ -1562,6 +1562,25 @@ int __sched __rt_mutex_futex_trylock(struct rt_mutex *lock)
|
|
return __rt_mutex_slowtrylock(lock);
|
|
}
|
|
|
|
+/**
|
|
+ * 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
|
|
--
|
|
2.17.1
|
|
|