Contributors: 26
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Ingo Molnar |
257 |
39.42% |
6 |
14.63% |
| Peter Zijlstra |
123 |
18.87% |
7 |
17.07% |
| Maxim Levitsky |
45 |
6.90% |
2 |
4.88% |
| George Stark |
42 |
6.44% |
1 |
2.44% |
| Thomas Gleixner |
37 |
5.67% |
3 |
7.32% |
| Liam R. Howlett |
28 |
4.29% |
1 |
2.44% |
| Tejun Heo |
26 |
3.99% |
1 |
2.44% |
| Neil Brown |
17 |
2.61% |
1 |
2.44% |
| Harvey Harrison |
13 |
1.99% |
1 |
2.44% |
| Eric Paris |
12 |
1.84% |
1 |
2.44% |
| Bart Van Assche |
10 |
1.53% |
1 |
2.44% |
| Jean Delvare |
9 |
1.38% |
1 |
2.44% |
| Andrew Morton |
6 |
0.92% |
2 |
4.88% |
| Masami Hiramatsu |
4 |
0.61% |
1 |
2.44% |
| Maarten Lankhorst |
4 |
0.61% |
1 |
2.44% |
| Kent Overstreet |
3 |
0.46% |
1 |
2.44% |
| Heiko Carstens |
3 |
0.46% |
1 |
2.44% |
| Jason Low |
3 |
0.46% |
1 |
2.44% |
| Mukesh Ojha |
2 |
0.31% |
1 |
2.44% |
| Yaowei Bai |
2 |
0.31% |
1 |
2.44% |
| Arjan van de Ven |
1 |
0.15% |
1 |
2.44% |
| Mauro Carvalho Chehab |
1 |
0.15% |
1 |
2.44% |
| Arun Sharma |
1 |
0.15% |
1 |
2.44% |
| Greg Kroah-Hartman |
1 |
0.15% |
1 |
2.44% |
| Tim Chen |
1 |
0.15% |
1 |
2.44% |
| Randy Dunlap |
1 |
0.15% |
1 |
2.44% |
| Total |
652 |
|
41 |
|
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Mutexes: blocking mutual exclusion locks
*
* started by Ingo Molnar:
*
* Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
*
* This file contains the main data structure and API definitions.
*/
#ifndef __LINUX_MUTEX_H
#define __LINUX_MUTEX_H
#include <asm/current.h>
#include <linux/list.h>
#include <linux/spinlock_types.h>
#include <linux/lockdep.h>
#include <linux/atomic.h>
#include <asm/processor.h>
#include <linux/osq_lock.h>
#include <linux/debug_locks.h>
#include <linux/cleanup.h>
#include <linux/mutex_types.h>
struct device;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \
, .dep_map = { \
.name = #lockname, \
.wait_type_inner = LD_WAIT_SLEEP, \
}
#else
# define __DEP_MAP_MUTEX_INITIALIZER(lockname)
#endif
#ifdef CONFIG_DEBUG_MUTEXES
# define __DEBUG_MUTEX_INITIALIZER(lockname) \
, .magic = &lockname
extern void mutex_destroy(struct mutex *lock);
#else
# define __DEBUG_MUTEX_INITIALIZER(lockname)
static inline void mutex_destroy(struct mutex *lock) {}
#endif
/**
* mutex_init - initialize the mutex
* @mutex: the mutex to be initialized
*
* Initialize the mutex to unlocked state.
*
* It is not allowed to initialize an already locked mutex.
*/
#define mutex_init(mutex) \
do { \
static struct lock_class_key __key; \
\
__mutex_init((mutex), #mutex, &__key); \
} while (0)
/**
* mutex_init_with_key - initialize a mutex with a given lockdep key
* @mutex: the mutex to be initialized
* @key: the lockdep key to be associated with the mutex
*
* Initialize the mutex to the unlocked state.
*
* It is not allowed to initialize an already locked mutex.
*/
#define mutex_init_with_key(mutex, key) __mutex_init((mutex), #mutex, (key))
#ifndef CONFIG_PREEMPT_RT
#define __MUTEX_INITIALIZER(lockname) \
{ .owner = ATOMIC_LONG_INIT(0) \
, .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(lockname.wait_lock) \
, .wait_list = LIST_HEAD_INIT(lockname.wait_list) \
__DEBUG_MUTEX_INITIALIZER(lockname) \
__DEP_MAP_MUTEX_INITIALIZER(lockname) }
#define DEFINE_MUTEX(mutexname) \
struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
extern void __mutex_init(struct mutex *lock, const char *name,
struct lock_class_key *key);
/**
* mutex_is_locked - is the mutex locked
* @lock: the mutex to be queried
*
* Returns true if the mutex is locked, false if unlocked.
*/
extern bool mutex_is_locked(struct mutex *lock);
#else /* !CONFIG_PREEMPT_RT */
/*
* Preempt-RT variant based on rtmutexes.
*/
#define __MUTEX_INITIALIZER(mutexname) \
{ \
.rtmutex = __RT_MUTEX_BASE_INITIALIZER(mutexname.rtmutex) \
__DEP_MAP_MUTEX_INITIALIZER(mutexname) \
}
#define DEFINE_MUTEX(mutexname) \
struct mutex mutexname = __MUTEX_INITIALIZER(mutexname)
extern void __mutex_rt_init(struct mutex *lock, const char *name,
struct lock_class_key *key);
#define mutex_is_locked(l) rt_mutex_base_is_locked(&(l)->rtmutex)
#define __mutex_init(mutex, name, key) \
do { \
rt_mutex_base_init(&(mutex)->rtmutex); \
__mutex_rt_init((mutex), name, key); \
} while (0)
#endif /* CONFIG_PREEMPT_RT */
#ifdef CONFIG_DEBUG_MUTEXES
int __devm_mutex_init(struct device *dev, struct mutex *lock);
#else
static inline int __devm_mutex_init(struct device *dev, struct mutex *lock)
{
/*
* When CONFIG_DEBUG_MUTEXES is off mutex_destroy() is just a nop so
* no really need to register it in the devm subsystem.
*/
return 0;
}
#endif
#define devm_mutex_init(dev, mutex) \
({ \
typeof(mutex) mutex_ = (mutex); \
\
mutex_init(mutex_); \
__devm_mutex_init(dev, mutex_); \
})
/*
* See kernel/locking/mutex.c for detailed documentation of these APIs.
* Also see Documentation/locking/mutex-design.rst.
*/
#ifdef CONFIG_DEBUG_LOCK_ALLOC
extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
extern void _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock);
extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock,
unsigned int subclass);
extern int __must_check _mutex_lock_killable(struct mutex *lock,
unsigned int subclass, struct lockdep_map *nest_lock);
extern void mutex_lock_io_nested(struct mutex *lock, unsigned int subclass);
#define mutex_lock(lock) mutex_lock_nested(lock, 0)
#define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0)
#define mutex_lock_killable(lock) _mutex_lock_killable(lock, 0, NULL)
#define mutex_lock_io(lock) mutex_lock_io_nested(lock, 0)
#define mutex_lock_nest_lock(lock, nest_lock) \
do { \
typecheck(struct lockdep_map *, &(nest_lock)->dep_map); \
_mutex_lock_nest_lock(lock, &(nest_lock)->dep_map); \
} while (0)
#define mutex_lock_killable_nest_lock(lock, nest_lock) \
( \
typecheck(struct lockdep_map *, &(nest_lock)->dep_map), \
_mutex_lock_killable(lock, 0, &(nest_lock)->dep_map) \
)
#define mutex_lock_killable_nested(lock, subclass) \
_mutex_lock_killable(lock, subclass, NULL)
#else
extern void mutex_lock(struct mutex *lock);
extern int __must_check mutex_lock_interruptible(struct mutex *lock);
extern int __must_check mutex_lock_killable(struct mutex *lock);
extern void mutex_lock_io(struct mutex *lock);
# define mutex_lock_nested(lock, subclass) mutex_lock(lock)
# define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
# define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock)
# define mutex_lock_killable_nest_lock(lock, nest_lock) mutex_lock_killable(lock)
# define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock)
# define mutex_lock_io_nested(lock, subclass) mutex_lock_io(lock)
#endif
/*
* NOTE: mutex_trylock() follows the spin_trylock() convention,
* not the down_trylock() convention!
*
* Returns 1 if the mutex has been acquired successfully, and 0 on contention.
*/
#ifdef CONFIG_DEBUG_LOCK_ALLOC
extern int _mutex_trylock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock);
#define mutex_trylock_nest_lock(lock, nest_lock) \
( \
typecheck(struct lockdep_map *, &(nest_lock)->dep_map), \
_mutex_trylock_nest_lock(lock, &(nest_lock)->dep_map) \
)
#define mutex_trylock(lock) _mutex_trylock_nest_lock(lock, NULL)
#else
extern int mutex_trylock(struct mutex *lock);
#define mutex_trylock_nest_lock(lock, nest_lock) mutex_trylock(lock)
#endif
extern void mutex_unlock(struct mutex *lock);
extern int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock);
DEFINE_GUARD(mutex, struct mutex *, mutex_lock(_T), mutex_unlock(_T))
DEFINE_GUARD_COND(mutex, _try, mutex_trylock(_T))
DEFINE_GUARD_COND(mutex, _intr, mutex_lock_interruptible(_T) == 0)
extern unsigned long mutex_get_owner(struct mutex *lock);
#endif /* __LINUX_MUTEX_H */