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authorDarren Hart <dvhltc@us.ibm.com>2009-04-03 13:40:12 -0700
committerThomas Gleixner <tglx@linutronix.de>2009-04-06 11:14:02 +0200
commit8dac456a681bd94272ff50ecb31be6b669382c2b (patch)
tree1558cac565781e503c6a793a7921b49c0ace9a22 /kernel/rtmutex_common.h
parentdd9739980b50c8cde33e1f8eb08b7e0140bcd61e (diff)
downloadlwn-8dac456a681bd94272ff50ecb31be6b669382c2b.tar.gz
lwn-8dac456a681bd94272ff50ecb31be6b669382c2b.zip
rt_mutex: add proxy lock routines
This patch is a prerequisite for futex requeue_pi. It basically splits rt_mutex_slowlock() right down the middle, just before the first call to schedule(). It further adds helper functions which make use of the split and provide the rt-mutex preliminaries for futex requeue_pi. Signed-off-by: Darren Hart <dvhltc@us.ibm.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/rtmutex_common.h')
-rw-r--r--kernel/rtmutex_common.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/rtmutex_common.h b/kernel/rtmutex_common.h
index e124bf5800ea..97a2f81866af 100644
--- a/kernel/rtmutex_common.h
+++ b/kernel/rtmutex_common.h
@@ -120,6 +120,14 @@ extern void rt_mutex_init_proxy_locked(struct rt_mutex *lock,
struct task_struct *proxy_owner);
extern void rt_mutex_proxy_unlock(struct rt_mutex *lock,
struct task_struct *proxy_owner);
+extern int rt_mutex_start_proxy_lock(struct rt_mutex *lock,
+ struct rt_mutex_waiter *waiter,
+ struct task_struct *task,
+ int detect_deadlock);
+extern int rt_mutex_finish_proxy_lock(struct rt_mutex *lock,
+ struct hrtimer_sleeper *to,
+ struct rt_mutex_waiter *waiter,
+ int detect_deadlock);
#ifdef CONFIG_DEBUG_RT_MUTEXES
# include "rtmutex-debug.h"