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authorPeter Zijlstra <peterz@infradead.org>2013-10-31 18:18:19 +0100
committerIngo Molnar <mingo@kernel.org>2013-11-06 09:23:59 +0100
commit1696a8bee390929fed05c6297164816ae2ced280 (patch)
tree59866e14aa5f8bf6f5ac0fa69211be6a5e05afd3 /kernel/rtmutex_common.h
parente25a64c4017e3a3cda17454b040737e410a12991 (diff)
downloadop-kernel-dev-1696a8bee390929fed05c6297164816ae2ced280.zip
op-kernel-dev-1696a8bee390929fed05c6297164816ae2ced280.tar.gz
locking: Move the rtmutex code to kernel/locking/
Suggested-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/n/tip-p9ijt8div0hwldexwfm4nlhj@git.kernel.org [ Fixed build failure in kernel/rcu/tree_plugin.h. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/rtmutex_common.h')
-rw-r--r--kernel/rtmutex_common.h126
1 files changed, 0 insertions, 126 deletions
diff --git a/kernel/rtmutex_common.h b/kernel/rtmutex_common.h
deleted file mode 100644
index 53a66c8..0000000
--- a/kernel/rtmutex_common.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/*
- * RT Mutexes: blocking mutual exclusion locks with PI support
- *
- * started by Ingo Molnar and Thomas Gleixner:
- *
- * Copyright (C) 2004-2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
- * Copyright (C) 2006, Timesys Corp., Thomas Gleixner <tglx@timesys.com>
- *
- * This file contains the private data structure and API definitions.
- */
-
-#ifndef __KERNEL_RTMUTEX_COMMON_H
-#define __KERNEL_RTMUTEX_COMMON_H
-
-#include <linux/rtmutex.h>
-
-/*
- * The rtmutex in kernel tester is independent of rtmutex debugging. We
- * call schedule_rt_mutex_test() instead of schedule() for the tasks which
- * belong to the tester. That way we can delay the wakeup path of those
- * threads to provoke lock stealing and testing of complex boosting scenarios.
- */
-#ifdef CONFIG_RT_MUTEX_TESTER
-
-extern void schedule_rt_mutex_test(struct rt_mutex *lock);
-
-#define schedule_rt_mutex(_lock) \
- do { \
- if (!(current->flags & PF_MUTEX_TESTER)) \
- schedule(); \
- else \
- schedule_rt_mutex_test(_lock); \
- } while (0)
-
-#else
-# define schedule_rt_mutex(_lock) schedule()
-#endif
-
-/*
- * This is the control structure for tasks blocked on a rt_mutex,
- * which is allocated on the kernel stack on of the blocked task.
- *
- * @list_entry: pi node to enqueue into the mutex waiters list
- * @pi_list_entry: pi node to enqueue into the mutex owner waiters list
- * @task: task reference to the blocked task
- */
-struct rt_mutex_waiter {
- struct plist_node list_entry;
- struct plist_node pi_list_entry;
- struct task_struct *task;
- struct rt_mutex *lock;
-#ifdef CONFIG_DEBUG_RT_MUTEXES
- unsigned long ip;
- struct pid *deadlock_task_pid;
- struct rt_mutex *deadlock_lock;
-#endif
-};
-
-/*
- * Various helpers to access the waiters-plist:
- */
-static inline int rt_mutex_has_waiters(struct rt_mutex *lock)
-{
- return !plist_head_empty(&lock->wait_list);
-}
-
-static inline struct rt_mutex_waiter *
-rt_mutex_top_waiter(struct rt_mutex *lock)
-{
- struct rt_mutex_waiter *w;
-
- w = plist_first_entry(&lock->wait_list, struct rt_mutex_waiter,
- list_entry);
- BUG_ON(w->lock != lock);
-
- return w;
-}
-
-static inline int task_has_pi_waiters(struct task_struct *p)
-{
- return !plist_head_empty(&p->pi_waiters);
-}
-
-static inline struct rt_mutex_waiter *
-task_top_pi_waiter(struct task_struct *p)
-{
- return plist_first_entry(&p->pi_waiters, struct rt_mutex_waiter,
- pi_list_entry);
-}
-
-/*
- * lock->owner state tracking:
- */
-#define RT_MUTEX_HAS_WAITERS 1UL
-#define RT_MUTEX_OWNER_MASKALL 1UL
-
-static inline struct task_struct *rt_mutex_owner(struct rt_mutex *lock)
-{
- return (struct task_struct *)
- ((unsigned long)lock->owner & ~RT_MUTEX_OWNER_MASKALL);
-}
-
-/*
- * PI-futex support (proxy locking functions, etc.):
- */
-extern struct task_struct *rt_mutex_next_owner(struct rt_mutex *lock);
-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"
-#else
-# include "rtmutex.h"
-#endif
-
-#endif
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