142 lines
4.4 KiB
Diff
142 lines
4.4 KiB
Diff
Subject: rt-add-rt-to-mutex-headers.patch
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Wed, 29 Jun 2011 20:56:22 +0200
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.0/patches-4.0.5-rt3.tar.xz
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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include/linux/mutex.h | 20 +++++++----
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include/linux/mutex_rt.h | 84 +++++++++++++++++++++++++++++++++++++++++++++++
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2 files changed, 97 insertions(+), 7 deletions(-)
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--- a/include/linux/mutex.h
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+++ b/include/linux/mutex.h
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@@ -19,6 +19,17 @@
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#include <asm/processor.h>
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#include <linux/osq_lock.h>
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+#ifdef CONFIG_DEBUG_LOCK_ALLOC
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+# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \
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+ , .dep_map = { .name = #lockname }
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+#else
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+# define __DEP_MAP_MUTEX_INITIALIZER(lockname)
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+#endif
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+
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+#ifdef CONFIG_PREEMPT_RT_FULL
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+# include <linux/mutex_rt.h>
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+#else
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+
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/*
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* Simple, straightforward mutexes with strict semantics:
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*
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@@ -99,13 +110,6 @@ do { \
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static inline void mutex_destroy(struct mutex *lock) {}
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#endif
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-#ifdef CONFIG_DEBUG_LOCK_ALLOC
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-# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \
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- , .dep_map = { .name = #lockname }
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-#else
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-# define __DEP_MAP_MUTEX_INITIALIZER(lockname)
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-#endif
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-
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#define __MUTEX_INITIALIZER(lockname) \
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{ .count = ATOMIC_INIT(1) \
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, .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \
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@@ -173,6 +177,8 @@ extern int __must_check mutex_lock_killa
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extern int mutex_trylock(struct mutex *lock);
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extern void mutex_unlock(struct mutex *lock);
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+#endif /* !PREEMPT_RT_FULL */
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+
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extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock);
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#endif /* __LINUX_MUTEX_H */
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--- /dev/null
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+++ b/include/linux/mutex_rt.h
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@@ -0,0 +1,84 @@
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+#ifndef __LINUX_MUTEX_RT_H
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+#define __LINUX_MUTEX_RT_H
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+
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+#ifndef __LINUX_MUTEX_H
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+#error "Please include mutex.h"
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+#endif
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+
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+#include <linux/rtmutex.h>
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+
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+/* FIXME: Just for __lockfunc */
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+#include <linux/spinlock.h>
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+
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+struct mutex {
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+ struct rt_mutex lock;
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+#ifdef CONFIG_DEBUG_LOCK_ALLOC
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+ struct lockdep_map dep_map;
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+#endif
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+};
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+
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+#define __MUTEX_INITIALIZER(mutexname) \
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+ { \
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+ .lock = __RT_MUTEX_INITIALIZER(mutexname.lock) \
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+ __DEP_MAP_MUTEX_INITIALIZER(mutexname) \
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+ }
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+
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+#define DEFINE_MUTEX(mutexname) \
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+ struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
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+
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+extern void __mutex_do_init(struct mutex *lock, const char *name, struct lock_class_key *key);
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+extern void __lockfunc _mutex_lock(struct mutex *lock);
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+extern int __lockfunc _mutex_lock_interruptible(struct mutex *lock);
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+extern int __lockfunc _mutex_lock_killable(struct mutex *lock);
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+extern void __lockfunc _mutex_lock_nested(struct mutex *lock, int subclass);
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+extern void __lockfunc _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock);
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+extern int __lockfunc _mutex_lock_interruptible_nested(struct mutex *lock, int subclass);
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+extern int __lockfunc _mutex_lock_killable_nested(struct mutex *lock, int subclass);
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+extern int __lockfunc _mutex_trylock(struct mutex *lock);
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+extern void __lockfunc _mutex_unlock(struct mutex *lock);
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+
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+#define mutex_is_locked(l) rt_mutex_is_locked(&(l)->lock)
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+#define mutex_lock(l) _mutex_lock(l)
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+#define mutex_lock_interruptible(l) _mutex_lock_interruptible(l)
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+#define mutex_lock_killable(l) _mutex_lock_killable(l)
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+#define mutex_trylock(l) _mutex_trylock(l)
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+#define mutex_unlock(l) _mutex_unlock(l)
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+#define mutex_destroy(l) rt_mutex_destroy(&(l)->lock)
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+
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+#ifdef CONFIG_DEBUG_LOCK_ALLOC
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+# define mutex_lock_nested(l, s) _mutex_lock_nested(l, s)
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+# define mutex_lock_interruptible_nested(l, s) \
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+ _mutex_lock_interruptible_nested(l, s)
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+# define mutex_lock_killable_nested(l, s) \
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+ _mutex_lock_killable_nested(l, s)
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+
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+# define mutex_lock_nest_lock(lock, nest_lock) \
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+do { \
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+ typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
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+ _mutex_lock_nest_lock(lock, &(nest_lock)->dep_map); \
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+} while (0)
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+
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+#else
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+# define mutex_lock_nested(l, s) _mutex_lock(l)
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+# define mutex_lock_interruptible_nested(l, s) \
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+ _mutex_lock_interruptible(l)
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+# define mutex_lock_killable_nested(l, s) \
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+ _mutex_lock_killable(l)
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+# define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock)
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+#endif
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+
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+# define mutex_init(mutex) \
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+do { \
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+ static struct lock_class_key __key; \
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+ \
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+ rt_mutex_init(&(mutex)->lock); \
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+ __mutex_do_init((mutex), #mutex, &__key); \
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+} while (0)
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+
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+# define __mutex_init(mutex, name, key) \
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+do { \
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+ rt_mutex_init(&(mutex)->lock); \
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+ __mutex_do_init((mutex), name, key); \
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+} while (0)
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+
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+#endif
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