Lines Matching full:mutex

5  * Original mutex implementation started by Ingo Molnar:
20 #include <linux/mutex.h>
29 #define WW_MUTEX_BASE			mutex
88  * ww_mutex_init - initialize the w/w mutex
89  * @lock: the mutex to be initialized
90  * @ww_class: the w/w class the mutex should belong to
92  * Initialize the w/w mutex to unlocked state and associate it with the given
93  * class. Static define macro for w/w mutex is not provided and this function
94  * is the only way to properly initialize the w/w mutex.
96  * It is not allowed to initialize an already locked mutex.
115  * Context-based w/w mutex acquiring can be done in any order whatsoever within
119  * Mixing of context-based w/w mutex acquiring and single w/w mutex locking can
161  * Marks the end of the acquire phase, any further w/w mutex lock calls using
164  * Calling this function is optional, it is just useful to document w/w mutex
206  * ww_mutex_lock - acquire the w/w mutex
207  * @lock: the mutex to be acquired
210  * Lock the w/w mutex exclusively for this task.
217  * returning -EALREADY. Returns 0 if the mutex was successfully acquired.
225  * The mutex must later on be released by the same task that
226  * acquired it. The task may not exit without first unlocking the mutex. Also,
227  * kernel memory where the mutex resides must not be freed with the mutex still
228  * locked. The mutex must first be initialized (or statically defined) before it
229  * can be locked. memset()-ing the mutex to 0 is not allowed. The mutex must be
232  * A mutex acquired with this function must be released with ww_mutex_unlock.
237  * ww_mutex_lock_interruptible - acquire the w/w mutex, interruptible
238  * @lock: the mutex to be acquired
241  * Lock the w/w mutex exclusively for this task.
248  * returning -EALREADY. Returns 0 if the mutex was successfully acquired. If a
257  * The mutex must later on be released by the same task that
258  * acquired it. The task may not exit without first unlocking the mutex. Also,
259  * kernel memory where the mutex resides must not be freed with the mutex still
260  * locked. The mutex must first be initialized (or statically defined) before it
261  * can be locked. memset()-ing the mutex to 0 is not allowed. The mutex must be
264  * A mutex acquired with this function must be released with ww_mutex_unlock.
270  * ww_mutex_lock_slow - slowpath acquiring of the w/w mutex
271  * @lock: the mutex to be acquired
274  * Acquires a w/w mutex with the given context after a die case. This function
282  * ww_mutex_lock can be used to avoid locking this contended mutex twice.
286  * contending mutex.
289  * ww_mutex_lock directly. This function here is simply to help w/w mutex
304  * ww_mutex_lock_slow_interruptible - slowpath acquiring of the w/w mutex, interruptible
305  * @lock: the mutex to be acquired
308  * Acquires a w/w mutex with the given context after a die case. This function
318  * ww_mutex_lock can be used to avoid locking this contended mutex twice.
322  * than the contending mutex.
326  * w/w mutex locking code readability by clearly denoting the slowpath.
344  * ww_mutex_destroy - mark a w/w mutex unusable
345  * @lock: the mutex to be destroyed
347  * This function marks the mutex uninitialized, and any subsequent
348  * use of the mutex is forbidden. The mutex must not be locked when
359  * ww_mutex_is_locked - is the w/w mutex locked
360  * @lock: the mutex to be queried
362  * Returns 1 if the mutex is locked, 0 if unlocked.