Lines Matching full:mutex

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.
125  * Context-based w/w mutex acquiring can be done in any order whatsoever within
129  * Mixing of context-based w/w mutex acquiring and single w/w mutex locking can
174  * Marks the end of the acquire phase, any further w/w mutex lock calls using
177  * Calling this function is optional, it is just useful to document w/w mutex
220  * ww_mutex_lock - acquire the w/w mutex
221  * @lock: the mutex to be acquired
224  * Lock the w/w mutex exclusively for this task.
231  * returning -EALREADY. Returns 0 if the mutex was successfully acquired.
239  * The mutex must later on be released by the same task that
240  * acquired it. The task may not exit without first unlocking the mutex. Also,
241  * kernel memory where the mutex resides must not be freed with the mutex still
242  * locked. The mutex must first be initialized (or statically defined) before it
243  * can be locked. memset()-ing the mutex to 0 is not allowed. The mutex must be
246  * A mutex acquired with this function must be released with ww_mutex_unlock.
251  * ww_mutex_lock_interruptible - acquire the w/w mutex, interruptible
252  * @lock: the mutex to be acquired
255  * Lock the w/w mutex exclusively for this task.
262  * returning -EALREADY. Returns 0 if the mutex was successfully acquired. If a
271  * The mutex must later on be released by the same task that
272  * acquired it. The task may not exit without first unlocking the mutex. Also,
273  * kernel memory where the mutex resides must not be freed with the mutex still
274  * locked. The mutex must first be initialized (or statically defined) before it
275  * can be locked. memset()-ing the mutex to 0 is not allowed. The mutex must be
278  * A mutex acquired with this function must be released with ww_mutex_unlock.
284  * ww_mutex_lock_slow - slowpath acquiring of the w/w mutex
285  * @lock: the mutex to be acquired
288  * Acquires a w/w mutex with the given context after a die case. This function
296  * ww_mutex_lock can be used to avoid locking this contended mutex twice.
300  * contending mutex.
303  * ww_mutex_lock directly. This function here is simply to help w/w mutex
318  * ww_mutex_lock_slow_interruptible - slowpath acquiring of the w/w mutex, interruptible
319  * @lock: the mutex to be acquired
322  * Acquires a w/w mutex with the given context after a die case. This function
332  * ww_mutex_lock can be used to avoid locking this contended mutex twice.
336  * than the contending mutex.
340  * w/w mutex locking code readability by clearly denoting the slowpath.
358  * ww_mutex_destroy - mark a w/w mutex unusable
359  * @lock: the mutex to be destroyed
361  * This function marks the mutex uninitialized, and any subsequent
362  * use of the mutex is forbidden. The mutex must not be locked when
373  * ww_mutex_is_locked - is the w/w mutex locked
374  * @lock: the mutex to be queried
376  * Returns 1 if the mutex is locked, 0 if unlocked.