| /linux/include/linux/ |
| H A D | mutex.h | 42 extern void mutex_destroy(struct mutex *lock);
48 static inline void mutex_destroy(struct mutex *lock) {} in mutex_destroy()
53 * mutex_init - initialize the mutex
54 * @mutex: the mutex to be initialized
56 * Initialize the mutex to unlocked state.
58 * It is not allowed to initialize an already locked mutex.
60 #define mutex_init(mutex) \ argument
64 __mutex_init((mutex), #mutex, &__key); \
68 * mutex_init_with_key - initialize a mutex with a given lockdep key
69 * @mutex: the mutex to be initialized
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| H A D | ww_mutex.h | 5 * Original mutex implementation started by Ingo Molnar:
20 #include <linux/mutex.h>
29 #define WW_MUTEX_BASE mutex
98 * ww_mutex_init - initialize the w/w mutex
99 * @lock: the mutex to be initialized
100 * @ww_class: the w/w class the mutex should belong to
102 * Initialize the w/w mutex to unlocked state and associate it with the given
103 * class. Static define macro for w/w mutex is not provided and this function
104 * is the only way to properly initialize the w/w mutex.
106 * It is not allowed to initialize an already locked mutex.
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| /linux/drivers/acpi/acpica/ |
| H A D | exmutex.c | 4 * Module Name: exmutex - ASL Mutex Acquire/Release functions
27 * PARAMETERS: obj_desc - The mutex to be unlinked
31 * DESCRIPTION: Remove a mutex from the "AcquiredMutex" list
37 struct acpi_thread_state *thread = obj_desc->mutex.owner_thread; in acpi_ex_unlink_mutex()
45 if (obj_desc->mutex.next) { in acpi_ex_unlink_mutex()
46 (obj_desc->mutex.next)->mutex.prev = obj_desc->mutex.prev; in acpi_ex_unlink_mutex()
49 if (obj_desc->mutex.prev) { in acpi_ex_unlink_mutex()
50 (obj_desc->mutex.prev)->mutex.next = obj_desc->mutex.next; in acpi_ex_unlink_mutex()
53 * Migrate the previous sync level associated with this mutex to in acpi_ex_unlink_mutex()
54 * the previous mutex on the list so that it may be preserved. in acpi_ex_unlink_mutex()
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| H A D | utxfmutex.c | 4 * Module Name: utxfmutex - external AML mutex access functions
25 * PARAMETERS: handle - Mutex or prefix handle (optional)
26 * pathname - Mutex pathname (optional)
27 * ret_obj - Where the mutex object is returned
31 * DESCRIPTION: Get an AML mutex object. The mutex node is pointed to by
52 /* Get a the namespace node for the mutex */ in acpi_ut_get_mutex_object()
64 /* Ensure that we actually have a Mutex object */ in acpi_ut_get_mutex_object()
70 /* Get the low-level mutex object */ in acpi_ut_get_mutex_object()
85 * PARAMETERS: handle - Mutex or prefix handle (optional)
86 * pathname - Mutex pathname (optional)
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| H A D | utmutex.c | 4 * Module Name: utmutex - local mutex support
27 * DESCRIPTION: Create the system mutex objects. This includes mutexes,
39 /* Create each of the predefined mutex objects */ in acpi_ut_mutex_initialize()
65 /* Mutex for _OSI support */ in acpi_ut_mutex_initialize()
90 * DESCRIPTION: Delete all of the system mutex objects. This includes mutexes,
101 /* Delete each predefined mutex object */ in acpi_ut_mutex_terminate()
125 * PARAMETERS: mutex_ID - ID of the mutex to be created
129 * DESCRIPTION: Create a mutex object.
139 if (!acpi_gbl_mutex_info[mutex_id].mutex) { in acpi_ut_create_mutex()
141 acpi_os_create_mutex(&acpi_gbl_mutex_info[mutex_id].mutex); in acpi_ut_create_mutex()
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| H A D | dsmethod.c | 138 * Mark the method as serialized. Later code will create a mutex for in acpi_ds_detect_named_opcodes()
242 * DESCRIPTION: Create a mutex object for a serialized control method
254 /* Create the new mutex object */ in acpi_ds_create_method_mutex()
261 /* Create the actual OS Mutex */ in acpi_ds_create_method_mutex()
263 status = acpi_os_create_mutex(&mutex_desc->mutex.os_mutex); in acpi_ds_create_method_mutex()
269 mutex_desc->mutex.sync_level = method_desc->method.sync_level; in acpi_ds_create_method_mutex()
270 method_desc->method.mutex = mutex_desc; in acpi_ds_create_method_mutex()
315 * If this method is serialized, we need to acquire the method mutex. in acpi_ds_begin_method_execution()
319 * Create a mutex for the method if it is defined to be Serialized in acpi_ds_begin_method_execution()
320 * and a mutex has not already been created. We defer the mutex creation in acpi_ds_begin_method_execution()
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| /linux/drivers/net/ethernet/netronome/nfp/nfpcore/ |
| H A D | nfp_mutex.c | 69 * nfp_cpp_mutex_init() - Initialize a mutex location
73 * @key: Unique 32-bit value for this mutex
78 * This creates the initial mutex state, as locked by this
109 * nfp_cpp_mutex_alloc() - Create a mutex handle
128 struct nfp_cpp_mutex *mutex; in nfp_cpp_mutex_alloc() local
143 mutex = kzalloc(sizeof(*mutex), GFP_KERNEL); in nfp_cpp_mutex_alloc()
144 if (!mutex) in nfp_cpp_mutex_alloc()
147 mutex->cpp = cpp; in nfp_cpp_mutex_alloc()
148 mutex->target = target; in nfp_cpp_mutex_alloc()
149 mutex->address = address; in nfp_cpp_mutex_alloc()
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| /linux/Documentation/devicetree/bindings/soc/mediatek/ |
| H A D | mediatek,mutex.yaml | 4 $id: http://devicetree.org/schemas/soc/mediatek/mediatek,mutex.yaml#
7 title: Mediatek mutex
14 Mediatek mutex, namely MUTEX, is used to send the triggers signals called
17 In some SoC, such as mt2701, MUTEX could be a hardware mutex which protects
19 MUTEX device node must be siblings to the central MMSYS_CONFIG node.
27 - mediatek,mt2701-disp-mutex
28 - mediatek,mt2712-disp-mutex
29 - mediatek,mt6795-disp-mutex
30 - mediatek,mt8167-disp-mutex
31 - mediatek,mt8173-disp-mutex
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| /linux/drivers/soc/mediatek/ |
| H A D | mtk-mutex.c | 13 #include <linux/soc/mediatek/mtk-mutex.h>
39 * mutex ID bit accordingly.
41 #define DISP_REG_MUTEX_MOD(mutex, id, n) ({ \ argument
42 const typeof(mutex) _mutex = (mutex); \
365 struct mtk_mutex mutex[MTK_MUTEX_MAX_HANDLES]; member
705 * So that MUTEX can not only send a STREAM_DONE event to GCE
854 if (!mtx->mutex[i].claimed) { in mtk_mutex_get()
855 mtx->mutex[i].claimed = true; in mtk_mutex_get()
856 return &mtx->mutex[i]; in mtk_mutex_get()
863 void mtk_mutex_put(struct mtk_mutex *mutex) in mtk_mutex_put() argument
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| /linux/Documentation/locking/ |
| H A D | mutex-design.rst | 2 Generic Mutex Subsystem
26 Mutexes are represented by 'struct mutex', defined in include/linux/mutex.h
27 and implemented in kernel/locking/mutex.c. These locks use an atomic variable
37 When acquiring a mutex, there are three possible paths that can be
49 soon. The mutex spinners are queued up using MCS lock so that only
50 one spinner can compete for the mutex.
61 waiting to spin on mutex owner, only to go directly to slowpath upon
78 The mutex subsystem checks and enforces the following rules:
80 - Only one task can hold the mutex at a time.
81 - Only the owner can unlock the mutex.
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| H A D | rt-mutex-design.rst | 2 RT-mutex implementation design
12 Documentation/locking/rt-mutex.rst. Although this document does explain problems
27 to use a resource that a lower priority process has (a mutex for example),
85 mutex
88 the PI locks will be called a mutex.
103 a process being blocked on the mutex, it is fine to allocate
105 structure holds a pointer to the task, as well as the mutex that
107 place the task in the waiters rbtree of a mutex as well as the
108 pi_waiters rbtree of a mutex owner task (described below).
111 on a mutex. This is the same as waiter->task.
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| H A D | futex-requeue-pi.rst | 8 boosting logic [see rt-mutex-design.rst] For the purposes of
21 rest to the natural wakeup inherent in unlocking the mutex
26 /* caller must lock mutex */
27 pthread_cond_wait(cond, mutex)
30 unlock(mutex);
37 lock(mutex);
44 futex_requeue(cond->data.__futex, cond->mutex);
47 Once pthread_cond_broadcast() requeues the tasks, the cond->mutex
49 mutex only after it has returned to user space. This will leave the
60 /* caller must lock mutex */
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| /linux/kernel/locking/ |
| H A D | mutex.c | 3 * kernel/locking/mutex.c
19 * Also see Documentation/locking/mutex-design.rst.
21 #include <linux/mutex.h>
38 #include "mutex.h"
47 __mutex_init(struct mutex *lock, const char *name, struct lock_class_key *key) in __mutex_init()
65 bool mutex_is_locked(struct mutex *lock) in mutex_is_locked()
77 unsigned long mutex_get_owner(struct mutex *lock) in mutex_get_owner()
87 static inline struct task_struct *__mutex_trylock_common(struct mutex *lock, bool handoff) in __mutex_trylock_common()
126 static inline bool __mutex_trylock_or_handoff(struct mutex *lock, bool handoff) in __mutex_trylock_or_handoff()
134 static inline bool __mutex_trylock(struct mutex *lock) in __mutex_trylock()
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| H A D | mutex-debug.c | 13 #include <linux/mutex.h>
24 #include "mutex.h"
29 void debug_mutex_lock_common(struct mutex *lock, struct mutex_waiter *waiter) in debug_mutex_lock_common()
37 void debug_mutex_wake_waiter(struct mutex *lock, struct mutex_waiter *waiter) in debug_mutex_wake_waiter()
51 void debug_mutex_add_waiter(struct mutex *lock, struct mutex_waiter *waiter, in debug_mutex_add_waiter()
60 void debug_mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter, in debug_mutex_remove_waiter()
63 struct mutex *blocked_on = __get_task_blocked_on(task); in debug_mutex_remove_waiter()
73 void debug_mutex_unlock(struct mutex *lock) in debug_mutex_unlock()
81 void debug_mutex_init(struct mutex *lock, const char *name, in debug_mutex_init()
99 int __devm_mutex_init(struct device *dev, struct mutex *lock) in __devm_mutex_init()
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| /linux/drivers/misc/ |
| H A D | ntsync.c | 16 #include <linux/mutex.h>
64 } mutex; member
132 struct mutex wait_all_lock;
238 if (obj->u.mutex.owner && obj->u.mutex.owner != owner) in is_signaled()
240 return obj->u.mutex.count < UINT_MAX; in is_signaled()
287 if (obj->u.mutex.ownerdead) in try_wake_all()
289 obj->u.mutex.ownerdead = false; in try_wake_all()
290 obj->u.mutex.count++; in try_wake_all()
291 obj->u.mutex.owner = q->owner; in try_wake_all()
340 static void try_wake_any_mutex(struct ntsync_obj *mutex) in try_wake_any_mutex() argument
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| /linux/Documentation/translations/zh_CN/locking/ |
| H A D | mutex-design.rst | 4 :Original: Documentation/locking/mutex-design.rst
25 在Linux内核中，互斥锁（mutex）指的是一个特殊的加锁原语，它在共享内存系统上
36 互斥锁由“struct mutex”表示，在include/linux/mutex.h中定义，并在
37 kernel/locking/mutex.c中实现。这些锁使用一个原子变量（->owner）来跟踪
107 mutex_init(mutex);
111 void mutex_lock(struct mutex *lock);
112 void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
113 int mutex_trylock(struct mutex *lock);
117 int mutex_lock_interruptible_nested(struct mutex *lock,
119 int mutex_lock_interruptible(struct mutex *lock);
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| /linux/drivers/media/i2c/ |
| H A D | tw9900.c | 83 struct mutex mutex; member
193 mutex_lock(&tw9900->mutex); in tw9900_get_fmt()
195 mutex_unlock(&tw9900->mutex); in tw9900_get_fmt()
207 mutex_lock(&tw9900->mutex); in tw9900_set_fmt()
210 mutex_unlock(&tw9900->mutex); in tw9900_set_fmt()
216 mutex_unlock(&tw9900->mutex); in tw9900_set_fmt()
241 /* v4l2_ctrl_lock() locks tw9900->mutex. */ in tw9900_s_ctrl()
265 mutex_lock(&tw9900->mutex); in tw9900_s_stream()
268 mutex_unlock(&tw9900->mutex); in tw9900_s_stream()
272 mutex_unlock(&tw9900->mutex); in tw9900_s_stream()
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| /linux/include/linux/soc/mediatek/ |
| H A D | mtk-mutex.h | 71 int mtk_mutex_prepare(struct mtk_mutex *mutex);
72 void mtk_mutex_add_comp(struct mtk_mutex *mutex,
74 void mtk_mutex_enable(struct mtk_mutex *mutex);
75 int mtk_mutex_enable_by_cmdq(struct mtk_mutex *mutex,
77 void mtk_mutex_disable(struct mtk_mutex *mutex);
78 void mtk_mutex_remove_comp(struct mtk_mutex *mutex,
80 void mtk_mutex_unprepare(struct mtk_mutex *mutex);
81 void mtk_mutex_put(struct mtk_mutex *mutex);
82 void mtk_mutex_acquire(struct mtk_mutex *mutex);
83 void mtk_mutex_release(struct mtk_mutex *mutex);
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| /linux/drivers/net/wireless/realtek/rtw88/ |
| H A D | mac80211.c | 58 mutex_lock(&rtwdev->mutex); in rtw_ops_start()
60 mutex_unlock(&rtwdev->mutex); in rtw_ops_start()
69 mutex_lock(&rtwdev->mutex); in rtw_ops_stop()
71 mutex_unlock(&rtwdev->mutex); in rtw_ops_stop()
82 mutex_lock(&rtwdev->mutex); in rtw_ops_config()
104 mutex_unlock(&rtwdev->mutex); in rtw_ops_config()
168 mutex_lock(&rtwdev->mutex); in rtw_ops_add_interface()
172 mutex_unlock(&rtwdev->mutex); in rtw_ops_add_interface()
178 mutex_unlock(&rtwdev->mutex); in rtw_ops_add_interface()
207 mutex_unlock(&rtwdev->mutex); in rtw_ops_add_interface()
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| /linux/Documentation/devicetree/bindings/hwlock/ |
| H A D | qcom-hwspinlock.yaml | 7 title: Qualcomm Hardware Mutex Block
20 - qcom,sfpb-mutex
21 - qcom,tcsr-mutex
24 - qcom,apq8084-tcsr-mutex
25 - qcom,ipq6018-tcsr-mutex
26 - qcom,msm8226-tcsr-mutex
27 - qcom,msm8994-tcsr-mutex
28 - const: qcom,tcsr-mutex
31 - qcom,msm8974-tcsr-mutex
32 - const: qcom,tcsr-mutex
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| /linux/drivers/vhost/ |
| H A D | test.c | 13 #include <linux/mutex.h>
51 mutex_lock(&vq->mutex); in handle_vq()
54 mutex_unlock(&vq->mutex); in handle_vq()
93 mutex_unlock(&vq->mutex); in handle_vq()
135 mutex_lock(&vq->mutex); in vhost_test_stop_vq()
138 mutex_unlock(&vq->mutex); in vhost_test_stop_vq()
175 mutex_lock(&n->dev.mutex); in vhost_test_run()
190 mutex_lock(&vq->mutex); in vhost_test_run()
199 mutex_unlock(&vq->mutex); in vhost_test_run()
209 mutex_unlock(&n->dev.mutex); in vhost_test_run()
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| /linux/drivers/media/dvb-core/ |
| H A D | dmxdev.c | 125 if (mutex_lock_interruptible(&dmxdev->mutex)) in dvb_dvr_open()
129 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
153 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
163 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
168 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
182 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
189 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
196 mutex_unlock(&dmxdev->mutex); in dvb_dvr_open()
205 mutex_lock(&dmxdev->mutex); in dvb_dvr_release()
234 mutex_unlock(&dmxdev->mutex); in dvb_dvr_release()
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| /linux/fs/kernfs/ |
| H A D | file.c | 43 static inline struct mutex *kernfs_open_file_mutex_ptr(struct kernfs_node *kn) in kernfs_open_file_mutex_ptr()
50 static inline struct mutex *kernfs_open_file_mutex_lock(struct kernfs_node *kn) in kernfs_open_file_mutex_lock()
52 struct mutex *lock; in kernfs_open_file_mutex_lock()
100 * the caller guarantees that this mutex is being held, other updaters can't
169 * @of->mutex nests outside active ref and is primarily to ensure that in kernfs_seq_start()
172 mutex_lock(&of->mutex); in kernfs_seq_start()
214 mutex_unlock(&of->mutex); in kernfs_seq_stop()
255 * @of->mutex nests outside active ref and is used both to ensure that in kernfs_file_read_iter()
258 mutex_lock(&of->mutex); in kernfs_file_read_iter()
261 mutex_unlock(&of->mutex); in kernfs_file_read_iter()
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| /linux/drivers/mtd/chips/ |
| H A D | cfi_cmdset_0020.c | 268 mutex_lock(&chip->mutex); in do_read_onechip()
300 mutex_unlock(&chip->mutex); in do_read_onechip()
306 mutex_unlock(&chip->mutex); in do_read_onechip()
308 mutex_lock(&chip->mutex); in do_read_onechip()
339 mutex_unlock(&chip->mutex); in do_read_onechip()
345 mutex_unlock(&chip->mutex); in do_read_onechip()
355 mutex_unlock(&chip->mutex); in do_read_onechip()
380 mutex_unlock(&chip->mutex); in do_read_onechip()
447 mutex_lock(&chip->mutex); in do_write_buffer()
472 mutex_unlock(&chip->mutex); in do_write_buffer()
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| /linux/drivers/cpufreq/ |
| H A D | cpufreq_userspace.c | 15 #include <linux/mutex.h>
21 struct mutex mutex; member
38 mutex_lock(&userspace->mutex); in cpufreq_set()
46 mutex_unlock(&userspace->mutex); in cpufreq_set()
63 mutex_init(&userspace->mutex); in cpufreq_userspace_policy_init()
86 mutex_lock(&userspace->mutex); in cpufreq_userspace_policy_start()
89 mutex_unlock(&userspace->mutex); in cpufreq_userspace_policy_start()
99 mutex_lock(&userspace->mutex); in cpufreq_userspace_policy_stop()
102 mutex_unlock(&userspace->mutex); in cpufreq_userspace_policy_stop()
109 mutex_lock(&userspace->mutex); in cpufreq_userspace_policy_limits()
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