#include <asm/current.h>
#include <uapi/linux/wait.h>
-typedef struct __wait_queue wait_queue_t;
-typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key);
-int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key);
+typedef struct wait_queue_entry wait_queue_entry_t;
-/* __wait_queue::flags */
+typedef int (*wait_queue_func_t)(struct wait_queue_entry *wq_entry, unsigned mode, int flags, void *key);
+int default_wake_function(struct wait_queue_entry *wq_entry, unsigned mode, int flags, void *key);
+
+/* wait_queue_entry::flags */
#define WQ_FLAG_EXCLUSIVE 0x01
#define WQ_FLAG_WOKEN 0x02
-struct __wait_queue {
+/*
+ * A single wait-queue entry structure:
+ */
+struct wait_queue_entry {
unsigned int flags;
void *private;
wait_queue_func_t func;
- struct list_head task_list;
-};
-
-struct wait_bit_key {
- void *flags;
- int bit_nr;
-#define WAIT_ATOMIC_T_BIT_NR -1
- unsigned long timeout;
+ struct list_head entry;
};
-struct wait_bit_queue {
- struct wait_bit_key key;
- wait_queue_t wait;
-};
-
-struct __wait_queue_head {
+struct wait_queue_head {
spinlock_t lock;
- struct list_head task_list;
+ struct list_head head;
};
-typedef struct __wait_queue_head wait_queue_head_t;
+typedef struct wait_queue_head wait_queue_head_t;
struct task_struct;
* Macros for declaration and initialisaton of the datatypes
*/
-#define __WAITQUEUE_INITIALIZER(name, tsk) { \
- .private = tsk, \
- .func = default_wake_function, \
- .task_list = { NULL, NULL } }
+#define __WAITQUEUE_INITIALIZER(name, tsk) { \
+ .private = tsk, \
+ .func = default_wake_function, \
+ .entry = { NULL, NULL } }
-#define DECLARE_WAITQUEUE(name, tsk) \
- wait_queue_t name = __WAITQUEUE_INITIALIZER(name, tsk)
+#define DECLARE_WAITQUEUE(name, tsk) \
+ struct wait_queue_entry name = __WAITQUEUE_INITIALIZER(name, tsk)
-#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
- .lock = __SPIN_LOCK_UNLOCKED(name.lock), \
- .task_list = { &(name).task_list, &(name).task_list } }
+#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
+ .lock = __SPIN_LOCK_UNLOCKED(name.lock), \
+ .head = { &(name).head, &(name).head } }
#define DECLARE_WAIT_QUEUE_HEAD(name) \
- wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
-
-#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \
- { .flags = word, .bit_nr = bit, }
+ struct wait_queue_head name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
-#define __WAIT_ATOMIC_T_KEY_INITIALIZER(p) \
- { .flags = p, .bit_nr = WAIT_ATOMIC_T_BIT_NR, }
+extern void __init_waitqueue_head(struct wait_queue_head *wq_head, const char *name, struct lock_class_key *);
-extern void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *);
-
-#define init_waitqueue_head(q) \
- do { \
- static struct lock_class_key __key; \
- \
- __init_waitqueue_head((q), #q, &__key); \
+#define init_waitqueue_head(wq_head) \
+ do { \
+ static struct lock_class_key __key; \
+ \
+ __init_waitqueue_head((wq_head), #wq_head, &__key); \
} while (0)
#ifdef CONFIG_LOCKDEP
# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \
({ init_waitqueue_head(&name); name; })
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \
- wait_queue_head_t name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
+ struct wait_queue_head name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
#else
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name)
#endif
-static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p)
+static inline void init_waitqueue_entry(struct wait_queue_entry *wq_entry, struct task_struct *p)
{
- q->flags = 0;
- q->private = p;
- q->func = default_wake_function;
+ wq_entry->flags = 0;
+ wq_entry->private = p;
+ wq_entry->func = default_wake_function;
}
static inline void
-init_waitqueue_func_entry(wait_queue_t *q, wait_queue_func_t func)
+init_waitqueue_func_entry(struct wait_queue_entry *wq_entry, wait_queue_func_t func)
{
- q->flags = 0;
- q->private = NULL;
- q->func = func;
+ wq_entry->flags = 0;
+ wq_entry->private = NULL;
+ wq_entry->func = func;
}
/**
* waitqueue_active -- locklessly test for waiters on the queue
- * @q: the waitqueue to test for waiters
+ * @wq_head: the waitqueue to test for waiters
*
* returns true if the wait list is not empty
*
* NOTE: this function is lockless and requires care, incorrect usage _will_
* lead to sporadic and non-obvious failure.
*
- * Use either while holding wait_queue_head_t::lock or when used for wakeups
+ * Use either while holding wait_queue_head::lock or when used for wakeups
* with an extra smp_mb() like:
*
* CPU0 - waker CPU1 - waiter
*
* for (;;) {
- * @cond = true; prepare_to_wait(&wq, &wait, state);
+ * @cond = true; prepare_to_wait(&wq_head, &wait, state);
* smp_mb(); // smp_mb() from set_current_state()
- * if (waitqueue_active(wq)) if (@cond)
- * wake_up(wq); break;
+ * if (waitqueue_active(wq_head)) if (@cond)
+ * wake_up(wq_head); break;
* schedule();
* }
- * finish_wait(&wq, &wait);
+ * finish_wait(&wq_head, &wait);
*
* Because without the explicit smp_mb() it's possible for the
* waitqueue_active() load to get hoisted over the @cond store such that we'll
* Also note that this 'optimization' trades a spin_lock() for an smp_mb(),
* which (when the lock is uncontended) are of roughly equal cost.
*/
-static inline int waitqueue_active(wait_queue_head_t *q)
+static inline int waitqueue_active(struct wait_queue_head *wq_head)
{
- return !list_empty(&q->task_list);
+ return !list_empty(&wq_head->head);
}
/**
* wq_has_sleeper - check if there are any waiting processes
- * @wq: wait queue head
+ * @wq_head: wait queue head
*
- * Returns true if wq has waiting processes
+ * Returns true if wq_head has waiting processes
*
* Please refer to the comment for waitqueue_active.
*/
-static inline bool wq_has_sleeper(wait_queue_head_t *wq)
+static inline bool wq_has_sleeper(struct wait_queue_head *wq_head)
{
/*
* We need to be sure we are in sync with the
* waiting side.
*/
smp_mb();
- return waitqueue_active(wq);
+ return waitqueue_active(wq_head);
}
-extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
-extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait);
-extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
+extern void add_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
+extern void add_wait_queue_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
+extern void remove_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
-static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new)
+static inline void __add_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
- list_add(&new->task_list, &head->task_list);
+ list_add(&wq_entry->entry, &wq_head->head);
}
/*
* Used for wake-one threads:
*/
static inline void
-__add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
+__add_wait_queue_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
- wait->flags |= WQ_FLAG_EXCLUSIVE;
- __add_wait_queue(q, wait);
+ wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
+ __add_wait_queue(wq_head, wq_entry);
}
-static inline void __add_wait_queue_tail(wait_queue_head_t *head,
- wait_queue_t *new)
+static inline void __add_wait_queue_entry_tail(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
- list_add_tail(&new->task_list, &head->task_list);
+ list_add_tail(&wq_entry->entry, &wq_head->head);
}
static inline void
-__add_wait_queue_tail_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
+__add_wait_queue_entry_tail_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
- wait->flags |= WQ_FLAG_EXCLUSIVE;
- __add_wait_queue_tail(q, wait);
+ wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
+ __add_wait_queue_entry_tail(wq_head, wq_entry);
}
static inline void
-__remove_wait_queue(wait_queue_head_t *head, wait_queue_t *old)
+__remove_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
- list_del(&old->task_list);
+ list_del(&wq_entry->entry);
}
-typedef int wait_bit_action_f(struct wait_bit_key *, int mode);
-void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
-void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key);
-void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
-void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr);
-void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr);
-void __wake_up_bit(wait_queue_head_t *, void *, int);
-int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
-int __wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
-void wake_up_bit(void *, int);
-void wake_up_atomic_t(atomic_t *);
-int out_of_line_wait_on_bit(void *, int, wait_bit_action_f *, unsigned);
-int out_of_line_wait_on_bit_timeout(void *, int, wait_bit_action_f *, unsigned, unsigned long);
-int out_of_line_wait_on_bit_lock(void *, int, wait_bit_action_f *, unsigned);
-int out_of_line_wait_on_atomic_t(atomic_t *, int (*)(atomic_t *), unsigned);
-wait_queue_head_t *bit_waitqueue(void *, int);
+void __wake_up(struct wait_queue_head *wq_head, unsigned int mode, int nr, void *key);
+void __wake_up_locked_key(struct wait_queue_head *wq_head, unsigned int mode, void *key);
+void __wake_up_sync_key(struct wait_queue_head *wq_head, unsigned int mode, int nr, void *key);
+void __wake_up_locked(struct wait_queue_head *wq_head, unsigned int mode, int nr);
+void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode, int nr);
#define wake_up(x) __wake_up(x, TASK_NORMAL, 1, NULL)
#define wake_up_nr(x, nr) __wake_up(x, TASK_NORMAL, nr, NULL)
/*
* Wakeup macros to be used to report events to the targets.
*/
-#define wake_up_poll(x, m) \
+#define wake_up_poll(x, m) \
__wake_up(x, TASK_NORMAL, 1, (void *) (m))
-#define wake_up_locked_poll(x, m) \
+#define wake_up_locked_poll(x, m) \
__wake_up_locked_key((x), TASK_NORMAL, (void *) (m))
-#define wake_up_interruptible_poll(x, m) \
+#define wake_up_interruptible_poll(x, m) \
__wake_up(x, TASK_INTERRUPTIBLE, 1, (void *) (m))
-#define wake_up_interruptible_sync_poll(x, m) \
+#define wake_up_interruptible_sync_poll(x, m) \
__wake_up_sync_key((x), TASK_INTERRUPTIBLE, 1, (void *) (m))
-#define ___wait_cond_timeout(condition) \
-({ \
- bool __cond = (condition); \
- if (__cond && !__ret) \
- __ret = 1; \
- __cond || !__ret; \
+#define ___wait_cond_timeout(condition) \
+({ \
+ bool __cond = (condition); \
+ if (__cond && !__ret) \
+ __ret = 1; \
+ __cond || !__ret; \
})
-#define ___wait_is_interruptible(state) \
- (!__builtin_constant_p(state) || \
- state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE) \
+#define ___wait_is_interruptible(state) \
+ (!__builtin_constant_p(state) || \
+ state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE) \
-extern void init_wait_entry(wait_queue_t *__wait, int flags);
+extern void init_wait_entry(struct wait_queue_entry *wq_entry, int flags);
/*
* The below macro ___wait_event() has an explicit shadow of the __ret
* otherwise.
*/
-#define ___wait_event(wq, condition, state, exclusive, ret, cmd) \
-({ \
- __label__ __out; \
- wait_queue_t __wait; \
- long __ret = ret; /* explicit shadow */ \
- \
- init_wait_entry(&__wait, exclusive ? WQ_FLAG_EXCLUSIVE : 0); \
- for (;;) { \
- long __int = prepare_to_wait_event(&wq, &__wait, state);\
- \
- if (condition) \
- break; \
- \
- if (___wait_is_interruptible(state) && __int) { \
- __ret = __int; \
- goto __out; \
- } \
- \
- cmd; \
- } \
- finish_wait(&wq, &__wait); \
-__out: __ret; \
+#define ___wait_event(wq_head, condition, state, exclusive, ret, cmd) \
+({ \
+ __label__ __out; \
+ struct wait_queue_entry __wq_entry; \
+ long __ret = ret; /* explicit shadow */ \
+ \
+ init_wait_entry(&__wq_entry, exclusive ? WQ_FLAG_EXCLUSIVE : 0); \
+ for (;;) { \
+ long __int = prepare_to_wait_event(&wq_head, &__wq_entry, state);\
+ \
+ if (condition) \
+ break; \
+ \
+ if (___wait_is_interruptible(state) && __int) { \
+ __ret = __int; \
+ goto __out; \
+ } \
+ \
+ cmd; \
+ } \
+ finish_wait(&wq_head, &__wq_entry); \
+__out: __ret; \
})
-#define __wait_event(wq, condition) \
- (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
+#define __wait_event(wq_head, condition) \
+ (void)___wait_event(wq_head, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
schedule())
/**
* wait_event - sleep until a condition gets true
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true. The @condition is checked each time
- * the waitqueue @wq is woken up.
+ * the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
*/
-#define wait_event(wq, condition) \
-do { \
- might_sleep(); \
- if (condition) \
- break; \
- __wait_event(wq, condition); \
+#define wait_event(wq_head, condition) \
+do { \
+ might_sleep(); \
+ if (condition) \
+ break; \
+ __wait_event(wq_head, condition); \
} while (0)
-#define __io_wait_event(wq, condition) \
- (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
+#define __io_wait_event(wq_head, condition) \
+ (void)___wait_event(wq_head, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
io_schedule())
/*
* io_wait_event() -- like wait_event() but with io_schedule()
*/
-#define io_wait_event(wq, condition) \
-do { \
- might_sleep(); \
- if (condition) \
- break; \
- __io_wait_event(wq, condition); \
+#define io_wait_event(wq_head, condition) \
+do { \
+ might_sleep(); \
+ if (condition) \
+ break; \
+ __io_wait_event(wq_head, condition); \
} while (0)
-#define __wait_event_freezable(wq, condition) \
- ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \
+#define __wait_event_freezable(wq_head, condition) \
+ ___wait_event(wq_head, condition, TASK_INTERRUPTIBLE, 0, 0, \
schedule(); try_to_freeze())
/**
* wait_event_freezable - sleep (or freeze) until a condition gets true
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
*
* The process is put to sleep (TASK_INTERRUPTIBLE -- so as not to contribute
* to system load) until the @condition evaluates to true. The
- * @condition is checked each time the waitqueue @wq is woken up.
+ * @condition is checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
*/
-#define wait_event_freezable(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_freezable(wq, condition); \
- __ret; \
+#define wait_event_freezable(wq_head, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_freezable(wq_head, condition); \
+ __ret; \
})
-#define __wait_event_timeout(wq, condition, timeout) \
- ___wait_event(wq, ___wait_cond_timeout(condition), \
- TASK_UNINTERRUPTIBLE, 0, timeout, \
+#define __wait_event_timeout(wq_head, condition, timeout) \
+ ___wait_event(wq_head, ___wait_cond_timeout(condition), \
+ TASK_UNINTERRUPTIBLE, 0, timeout, \
__ret = schedule_timeout(__ret))
/**
* wait_event_timeout - sleep until a condition gets true or a timeout elapses
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @timeout: timeout, in jiffies
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true. The @condition is checked each time
- * the waitqueue @wq is woken up.
+ * the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* or the remaining jiffies (at least 1) if the @condition evaluated
* to %true before the @timeout elapsed.
*/
-#define wait_event_timeout(wq, condition, timeout) \
-({ \
- long __ret = timeout; \
- might_sleep(); \
- if (!___wait_cond_timeout(condition)) \
- __ret = __wait_event_timeout(wq, condition, timeout); \
- __ret; \
+#define wait_event_timeout(wq_head, condition, timeout) \
+({ \
+ long __ret = timeout; \
+ might_sleep(); \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_timeout(wq_head, condition, timeout); \
+ __ret; \
})
-#define __wait_event_freezable_timeout(wq, condition, timeout) \
- ___wait_event(wq, ___wait_cond_timeout(condition), \
- TASK_INTERRUPTIBLE, 0, timeout, \
+#define __wait_event_freezable_timeout(wq_head, condition, timeout) \
+ ___wait_event(wq_head, ___wait_cond_timeout(condition), \
+ TASK_INTERRUPTIBLE, 0, timeout, \
__ret = schedule_timeout(__ret); try_to_freeze())
/*
* like wait_event_timeout() -- except it uses TASK_INTERRUPTIBLE to avoid
* increasing load and is freezable.
*/
-#define wait_event_freezable_timeout(wq, condition, timeout) \
-({ \
- long __ret = timeout; \
- might_sleep(); \
- if (!___wait_cond_timeout(condition)) \
- __ret = __wait_event_freezable_timeout(wq, condition, timeout); \
- __ret; \
+#define wait_event_freezable_timeout(wq_head, condition, timeout) \
+({ \
+ long __ret = timeout; \
+ might_sleep(); \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_freezable_timeout(wq_head, condition, timeout); \
+ __ret; \
})
-#define __wait_event_exclusive_cmd(wq, condition, cmd1, cmd2) \
- (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 1, 0, \
+#define __wait_event_exclusive_cmd(wq_head, condition, cmd1, cmd2) \
+ (void)___wait_event(wq_head, condition, TASK_UNINTERRUPTIBLE, 1, 0, \
cmd1; schedule(); cmd2)
/*
* Just like wait_event_cmd(), except it sets exclusive flag
*/
-#define wait_event_exclusive_cmd(wq, condition, cmd1, cmd2) \
-do { \
- if (condition) \
- break; \
- __wait_event_exclusive_cmd(wq, condition, cmd1, cmd2); \
+#define wait_event_exclusive_cmd(wq_head, condition, cmd1, cmd2) \
+do { \
+ if (condition) \
+ break; \
+ __wait_event_exclusive_cmd(wq_head, condition, cmd1, cmd2); \
} while (0)
-#define __wait_event_cmd(wq, condition, cmd1, cmd2) \
- (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
+#define __wait_event_cmd(wq_head, condition, cmd1, cmd2) \
+ (void)___wait_event(wq_head, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
cmd1; schedule(); cmd2)
/**
* wait_event_cmd - sleep until a condition gets true
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @cmd1: the command will be executed before sleep
* @cmd2: the command will be executed after sleep
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true. The @condition is checked each time
- * the waitqueue @wq is woken up.
+ * the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
*/
-#define wait_event_cmd(wq, condition, cmd1, cmd2) \
-do { \
- if (condition) \
- break; \
- __wait_event_cmd(wq, condition, cmd1, cmd2); \
+#define wait_event_cmd(wq_head, condition, cmd1, cmd2) \
+do { \
+ if (condition) \
+ break; \
+ __wait_event_cmd(wq_head, condition, cmd1, cmd2); \
} while (0)
-#define __wait_event_interruptible(wq, condition) \
- ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \
+#define __wait_event_interruptible(wq_head, condition) \
+ ___wait_event(wq_head, condition, TASK_INTERRUPTIBLE, 0, 0, \
schedule())
/**
* wait_event_interruptible - sleep until a condition gets true
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or a signal is received.
- * The @condition is checked each time the waitqueue @wq is woken up.
+ * The @condition is checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_interruptible(wq, condition); \
- __ret; \
+#define wait_event_interruptible(wq_head, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_interruptible(wq_head, condition); \
+ __ret; \
})
-#define __wait_event_interruptible_timeout(wq, condition, timeout) \
- ___wait_event(wq, ___wait_cond_timeout(condition), \
- TASK_INTERRUPTIBLE, 0, timeout, \
+#define __wait_event_interruptible_timeout(wq_head, condition, timeout) \
+ ___wait_event(wq_head, ___wait_cond_timeout(condition), \
+ TASK_INTERRUPTIBLE, 0, timeout, \
__ret = schedule_timeout(__ret))
/**
* wait_event_interruptible_timeout - sleep until a condition gets true or a timeout elapses
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @timeout: timeout, in jiffies
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or a signal is received.
- * The @condition is checked each time the waitqueue @wq is woken up.
+ * The @condition is checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* to %true before the @timeout elapsed, or -%ERESTARTSYS if it was
* interrupted by a signal.
*/
-#define wait_event_interruptible_timeout(wq, condition, timeout) \
-({ \
- long __ret = timeout; \
- might_sleep(); \
- if (!___wait_cond_timeout(condition)) \
- __ret = __wait_event_interruptible_timeout(wq, \
- condition, timeout); \
- __ret; \
+#define wait_event_interruptible_timeout(wq_head, condition, timeout) \
+({ \
+ long __ret = timeout; \
+ might_sleep(); \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_interruptible_timeout(wq_head, \
+ condition, timeout); \
+ __ret; \
})
-#define __wait_event_hrtimeout(wq, condition, timeout, state) \
-({ \
- int __ret = 0; \
- struct hrtimer_sleeper __t; \
- \
- hrtimer_init_on_stack(&__t.timer, CLOCK_MONOTONIC, \
- HRTIMER_MODE_REL); \
- hrtimer_init_sleeper(&__t, current); \
- if ((timeout) != KTIME_MAX) \
- hrtimer_start_range_ns(&__t.timer, timeout, \
- current->timer_slack_ns, \
- HRTIMER_MODE_REL); \
- \
- __ret = ___wait_event(wq, condition, state, 0, 0, \
- if (!__t.task) { \
- __ret = -ETIME; \
- break; \
- } \
- schedule()); \
- \
- hrtimer_cancel(&__t.timer); \
- destroy_hrtimer_on_stack(&__t.timer); \
- __ret; \
+#define __wait_event_hrtimeout(wq_head, condition, timeout, state) \
+({ \
+ int __ret = 0; \
+ struct hrtimer_sleeper __t; \
+ \
+ hrtimer_init_on_stack(&__t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); \
+ hrtimer_init_sleeper(&__t, current); \
+ if ((timeout) != KTIME_MAX) \
+ hrtimer_start_range_ns(&__t.timer, timeout, \
+ current->timer_slack_ns, \
+ HRTIMER_MODE_REL); \
+ \
+ __ret = ___wait_event(wq_head, condition, state, 0, 0, \
+ if (!__t.task) { \
+ __ret = -ETIME; \
+ break; \
+ } \
+ schedule()); \
+ \
+ hrtimer_cancel(&__t.timer); \
+ destroy_hrtimer_on_stack(&__t.timer); \
+ __ret; \
})
/**
* wait_event_hrtimeout - sleep until a condition gets true or a timeout elapses
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @timeout: timeout, as a ktime_t
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true or a signal is received.
- * The @condition is checked each time the waitqueue @wq is woken up.
+ * The @condition is checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* The function returns 0 if @condition became true, or -ETIME if the timeout
* elapsed.
*/
-#define wait_event_hrtimeout(wq, condition, timeout) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_hrtimeout(wq, condition, timeout, \
- TASK_UNINTERRUPTIBLE); \
- __ret; \
+#define wait_event_hrtimeout(wq_head, condition, timeout) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_hrtimeout(wq_head, condition, timeout, \
+ TASK_UNINTERRUPTIBLE); \
+ __ret; \
})
/**
* wait_event_interruptible_hrtimeout - sleep until a condition gets true or a timeout elapses
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @timeout: timeout, as a ktime_t
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or a signal is received.
- * The @condition is checked each time the waitqueue @wq is woken up.
+ * The @condition is checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* The function returns 0 if @condition became true, -ERESTARTSYS if it was
* interrupted by a signal, or -ETIME if the timeout elapsed.
*/
-#define wait_event_interruptible_hrtimeout(wq, condition, timeout) \
-({ \
- long __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_hrtimeout(wq, condition, timeout, \
- TASK_INTERRUPTIBLE); \
- __ret; \
+#define wait_event_interruptible_hrtimeout(wq, condition, timeout) \
+({ \
+ long __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_hrtimeout(wq, condition, timeout, \
+ TASK_INTERRUPTIBLE); \
+ __ret; \
})
-#define __wait_event_interruptible_exclusive(wq, condition) \
- ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, 0, \
+#define __wait_event_interruptible_exclusive(wq, condition) \
+ ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, 0, \
schedule())
-#define wait_event_interruptible_exclusive(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_interruptible_exclusive(wq, condition);\
- __ret; \
+#define wait_event_interruptible_exclusive(wq, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_interruptible_exclusive(wq, condition); \
+ __ret; \
})
-#define __wait_event_killable_exclusive(wq, condition) \
- ___wait_event(wq, condition, TASK_KILLABLE, 1, 0, \
+#define __wait_event_killable_exclusive(wq, condition) \
+ ___wait_event(wq, condition, TASK_KILLABLE, 1, 0, \
schedule())
-#define wait_event_killable_exclusive(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_killable_exclusive(wq, condition); \
- __ret; \
+#define wait_event_killable_exclusive(wq, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_killable_exclusive(wq, condition); \
+ __ret; \
})
-#define __wait_event_freezable_exclusive(wq, condition) \
- ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, 0, \
+#define __wait_event_freezable_exclusive(wq, condition) \
+ ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 1, 0, \
schedule(); try_to_freeze())
-#define wait_event_freezable_exclusive(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_freezable_exclusive(wq, condition);\
- __ret; \
+#define wait_event_freezable_exclusive(wq, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_freezable_exclusive(wq, condition); \
+ __ret; \
})
-extern int do_wait_intr(wait_queue_head_t *, wait_queue_t *);
-extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
-
-#define __wait_event_interruptible_locked(wq, condition, exclusive, fn) \
-({ \
- int __ret; \
- DEFINE_WAIT(__wait); \
- if (exclusive) \
- __wait.flags |= WQ_FLAG_EXCLUSIVE; \
- do { \
- __ret = fn(&(wq), &__wait); \
- if (__ret) \
- break; \
- } while (!(condition)); \
- __remove_wait_queue(&(wq), &__wait); \
- __set_current_state(TASK_RUNNING); \
- __ret; \
+extern int do_wait_intr(wait_queue_head_t *, wait_queue_entry_t *);
+extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_entry_t *);
+
+#define __wait_event_interruptible_locked(wq, condition, exclusive, fn) \
+({ \
+ int __ret; \
+ DEFINE_WAIT(__wait); \
+ if (exclusive) \
+ __wait.flags |= WQ_FLAG_EXCLUSIVE; \
+ do { \
+ __ret = fn(&(wq), &__wait); \
+ if (__ret) \
+ break; \
+ } while (!(condition)); \
+ __remove_wait_queue(&(wq), &__wait); \
+ __set_current_state(TASK_RUNNING); \
+ __ret; \
})
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_locked(wq, condition) \
- ((condition) \
+#define wait_event_interruptible_locked(wq, condition) \
+ ((condition) \
? 0 : __wait_event_interruptible_locked(wq, condition, 0, do_wait_intr))
/**
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_locked_irq(wq, condition) \
- ((condition) \
+#define wait_event_interruptible_locked_irq(wq, condition) \
+ ((condition) \
? 0 : __wait_event_interruptible_locked(wq, condition, 0, do_wait_intr_irq))
/**
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_exclusive_locked(wq, condition) \
- ((condition) \
+#define wait_event_interruptible_exclusive_locked(wq, condition) \
+ ((condition) \
? 0 : __wait_event_interruptible_locked(wq, condition, 1, do_wait_intr))
/**
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_exclusive_locked_irq(wq, condition) \
- ((condition) \
+#define wait_event_interruptible_exclusive_locked_irq(wq, condition) \
+ ((condition) \
? 0 : __wait_event_interruptible_locked(wq, condition, 1, do_wait_intr_irq))
-#define __wait_event_killable(wq, condition) \
+#define __wait_event_killable(wq, condition) \
___wait_event(wq, condition, TASK_KILLABLE, 0, 0, schedule())
/**
* The function will return -ERESTARTSYS if it was interrupted by a
* signal and 0 if @condition evaluated to true.
*/
-#define wait_event_killable(wq, condition) \
-({ \
- int __ret = 0; \
- might_sleep(); \
- if (!(condition)) \
- __ret = __wait_event_killable(wq, condition); \
- __ret; \
+#define wait_event_killable(wq_head, condition) \
+({ \
+ int __ret = 0; \
+ might_sleep(); \
+ if (!(condition)) \
+ __ret = __wait_event_killable(wq_head, condition); \
+ __ret; \
})
-#define __wait_event_lock_irq(wq, condition, lock, cmd) \
- (void)___wait_event(wq, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
- spin_unlock_irq(&lock); \
- cmd; \
- schedule(); \
+#define __wait_event_lock_irq(wq_head, condition, lock, cmd) \
+ (void)___wait_event(wq_head, condition, TASK_UNINTERRUPTIBLE, 0, 0, \
+ spin_unlock_irq(&lock); \
+ cmd; \
+ schedule(); \
spin_lock_irq(&lock))
/**
* condition is checked under the lock. This
* is expected to be called with the lock
* taken.
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before cmd
* and schedule() and reacquired afterwards.
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true. The @condition is checked each time
- * the waitqueue @wq is woken up.
+ * the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* dropped before invoking the cmd and going to sleep and is reacquired
* afterwards.
*/
-#define wait_event_lock_irq_cmd(wq, condition, lock, cmd) \
-do { \
- if (condition) \
- break; \
- __wait_event_lock_irq(wq, condition, lock, cmd); \
+#define wait_event_lock_irq_cmd(wq_head, condition, lock, cmd) \
+do { \
+ if (condition) \
+ break; \
+ __wait_event_lock_irq(wq_head, condition, lock, cmd); \
} while (0)
/**
* condition is checked under the lock. This
* is expected to be called with the lock
* taken.
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before schedule()
* and reacquired afterwards.
*
* The process is put to sleep (TASK_UNINTERRUPTIBLE) until the
* @condition evaluates to true. The @condition is checked each time
- * the waitqueue @wq is woken up.
+ * the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* This is supposed to be called while holding the lock. The lock is
* dropped before going to sleep and is reacquired afterwards.
*/
-#define wait_event_lock_irq(wq, condition, lock) \
-do { \
- if (condition) \
- break; \
- __wait_event_lock_irq(wq, condition, lock, ); \
+#define wait_event_lock_irq(wq_head, condition, lock) \
+do { \
+ if (condition) \
+ break; \
+ __wait_event_lock_irq(wq_head, condition, lock, ); \
} while (0)
-#define __wait_event_interruptible_lock_irq(wq, condition, lock, cmd) \
- ___wait_event(wq, condition, TASK_INTERRUPTIBLE, 0, 0, \
- spin_unlock_irq(&lock); \
- cmd; \
- schedule(); \
+#define __wait_event_interruptible_lock_irq(wq_head, condition, lock, cmd) \
+ ___wait_event(wq_head, condition, TASK_INTERRUPTIBLE, 0, 0, \
+ spin_unlock_irq(&lock); \
+ cmd; \
+ schedule(); \
spin_lock_irq(&lock))
/**
* wait_event_interruptible_lock_irq_cmd - sleep until a condition gets true.
* The condition is checked under the lock. This is expected to
* be called with the lock taken.
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before cmd and
* schedule() and reacquired afterwards.
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or a signal is received. The @condition is
- * checked each time the waitqueue @wq is woken up.
+ * checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* The macro will return -ERESTARTSYS if it was interrupted by a signal
* and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_lock_irq_cmd(wq, condition, lock, cmd) \
-({ \
- int __ret = 0; \
- if (!(condition)) \
- __ret = __wait_event_interruptible_lock_irq(wq, \
- condition, lock, cmd); \
- __ret; \
+#define wait_event_interruptible_lock_irq_cmd(wq_head, condition, lock, cmd) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __ret = __wait_event_interruptible_lock_irq(wq_head, \
+ condition, lock, cmd); \
+ __ret; \
})
/**
* wait_event_interruptible_lock_irq - sleep until a condition gets true.
* The condition is checked under the lock. This is expected
* to be called with the lock taken.
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before schedule()
* and reacquired afterwards.
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or signal is received. The @condition is
- * checked each time the waitqueue @wq is woken up.
+ * checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* The macro will return -ERESTARTSYS if it was interrupted by a signal
* and 0 if @condition evaluated to true.
*/
-#define wait_event_interruptible_lock_irq(wq, condition, lock) \
-({ \
- int __ret = 0; \
- if (!(condition)) \
- __ret = __wait_event_interruptible_lock_irq(wq, \
- condition, lock,); \
- __ret; \
+#define wait_event_interruptible_lock_irq(wq_head, condition, lock) \
+({ \
+ int __ret = 0; \
+ if (!(condition)) \
+ __ret = __wait_event_interruptible_lock_irq(wq_head, \
+ condition, lock,); \
+ __ret; \
})
-#define __wait_event_interruptible_lock_irq_timeout(wq, condition, \
- lock, timeout) \
- ___wait_event(wq, ___wait_cond_timeout(condition), \
- TASK_INTERRUPTIBLE, 0, timeout, \
- spin_unlock_irq(&lock); \
- __ret = schedule_timeout(__ret); \
+#define __wait_event_interruptible_lock_irq_timeout(wq_head, condition, \
+ lock, timeout) \
+ ___wait_event(wq_head, ___wait_cond_timeout(condition), \
+ TASK_INTERRUPTIBLE, 0, timeout, \
+ spin_unlock_irq(&lock); \
+ __ret = schedule_timeout(__ret); \
spin_lock_irq(&lock));
/**
* wait_event_interruptible_lock_irq_timeout - sleep until a condition gets
* true or a timeout elapses. The condition is checked under
* the lock. This is expected to be called with the lock taken.
- * @wq: the waitqueue to wait on
+ * @wq_head: the waitqueue to wait on
* @condition: a C expression for the event to wait for
* @lock: a locked spinlock_t, which will be released before schedule()
* and reacquired afterwards.
*
* The process is put to sleep (TASK_INTERRUPTIBLE) until the
* @condition evaluates to true or signal is received. The @condition is
- * checked each time the waitqueue @wq is woken up.
+ * checked each time the waitqueue @wq_head is woken up.
*
* wake_up() has to be called after changing any variable that could
* change the result of the wait condition.
* was interrupted by a signal, and the remaining jiffies otherwise
* if the condition evaluated to true before the timeout elapsed.
*/
-#define wait_event_interruptible_lock_irq_timeout(wq, condition, lock, \
- timeout) \
-({ \
- long __ret = timeout; \
- if (!___wait_cond_timeout(condition)) \
- __ret = __wait_event_interruptible_lock_irq_timeout( \
- wq, condition, lock, timeout); \
- __ret; \
+#define wait_event_interruptible_lock_irq_timeout(wq_head, condition, lock, \
+ timeout) \
+({ \
+ long __ret = timeout; \
+ if (!___wait_cond_timeout(condition)) \
+ __ret = __wait_event_interruptible_lock_irq_timeout( \
+ wq_head, condition, lock, timeout); \
+ __ret; \
})
/*
* Waitqueues which are removed from the waitqueue_head at wakeup time
*/
-void prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state);
-void prepare_to_wait_exclusive(wait_queue_head_t *q, wait_queue_t *wait, int state);
-long prepare_to_wait_event(wait_queue_head_t *q, wait_queue_t *wait, int state);
-void finish_wait(wait_queue_head_t *q, wait_queue_t *wait);
-long wait_woken(wait_queue_t *wait, unsigned mode, long timeout);
-int woken_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
-int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
-int wake_bit_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
-
-#define DEFINE_WAIT_FUNC(name, function) \
- wait_queue_t name = { \
- .private = current, \
- .func = function, \
- .task_list = LIST_HEAD_INIT((name).task_list), \
+void prepare_to_wait(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state);
+void prepare_to_wait_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state);
+long prepare_to_wait_event(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state);
+void finish_wait(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
+long wait_woken(struct wait_queue_entry *wq_entry, unsigned mode, long timeout);
+int woken_wake_function(struct wait_queue_entry *wq_entry, unsigned mode, int sync, void *key);
+int autoremove_wake_function(struct wait_queue_entry *wq_entry, unsigned mode, int sync, void *key);
+
+#define DEFINE_WAIT_FUNC(name, function) \
+ struct wait_queue_entry name = { \
+ .private = current, \
+ .func = function, \
+ .entry = LIST_HEAD_INIT((name).entry), \
}
#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, autoremove_wake_function)
-#define DEFINE_WAIT_BIT(name, word, bit) \
- struct wait_bit_queue name = { \
- .key = __WAIT_BIT_KEY_INITIALIZER(word, bit), \
- .wait = { \
- .private = current, \
- .func = wake_bit_function, \
- .task_list = \
- LIST_HEAD_INIT((name).wait.task_list), \
- }, \
- }
-
-#define init_wait(wait) \
- do { \
- (wait)->private = current; \
- (wait)->func = autoremove_wake_function; \
- INIT_LIST_HEAD(&(wait)->task_list); \
- (wait)->flags = 0; \
+#define init_wait(wait) \
+ do { \
+ (wait)->private = current; \
+ (wait)->func = autoremove_wake_function; \
+ INIT_LIST_HEAD(&(wait)->entry); \
+ (wait)->flags = 0; \
} while (0)
-
-extern int bit_wait(struct wait_bit_key *, int);
-extern int bit_wait_io(struct wait_bit_key *, int);
-extern int bit_wait_timeout(struct wait_bit_key *, int);
-extern int bit_wait_io_timeout(struct wait_bit_key *, int);
-
-/**
- * wait_on_bit - wait for a bit to be cleared
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @mode: the task state to sleep in
- *
- * There is a standard hashed waitqueue table for generic use. This
- * is the part of the hashtable's accessor API that waits on a bit.
- * For instance, if one were to have waiters on a bitflag, one would
- * call wait_on_bit() in threads waiting for the bit to clear.
- * One uses wait_on_bit() where one is waiting for the bit to clear,
- * but has no intention of setting it.
- * Returned value will be zero if the bit was cleared, or non-zero
- * if the process received a signal and the mode permitted wakeup
- * on that signal.
- */
-static inline int
-wait_on_bit(unsigned long *word, int bit, unsigned mode)
-{
- might_sleep();
- if (!test_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit(word, bit,
- bit_wait,
- mode);
-}
-
-/**
- * wait_on_bit_io - wait for a bit to be cleared
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @mode: the task state to sleep in
- *
- * Use the standard hashed waitqueue table to wait for a bit
- * to be cleared. This is similar to wait_on_bit(), but calls
- * io_schedule() instead of schedule() for the actual waiting.
- *
- * Returned value will be zero if the bit was cleared, or non-zero
- * if the process received a signal and the mode permitted wakeup
- * on that signal.
- */
-static inline int
-wait_on_bit_io(unsigned long *word, int bit, unsigned mode)
-{
- might_sleep();
- if (!test_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit(word, bit,
- bit_wait_io,
- mode);
-}
-
-/**
- * wait_on_bit_timeout - wait for a bit to be cleared or a timeout elapses
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @mode: the task state to sleep in
- * @timeout: timeout, in jiffies
- *
- * Use the standard hashed waitqueue table to wait for a bit
- * to be cleared. This is similar to wait_on_bit(), except also takes a
- * timeout parameter.
- *
- * Returned value will be zero if the bit was cleared before the
- * @timeout elapsed, or non-zero if the @timeout elapsed or process
- * received a signal and the mode permitted wakeup on that signal.
- */
-static inline int
-wait_on_bit_timeout(unsigned long *word, int bit, unsigned mode,
- unsigned long timeout)
-{
- might_sleep();
- if (!test_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit_timeout(word, bit,
- bit_wait_timeout,
- mode, timeout);
-}
-
-/**
- * wait_on_bit_action - wait for a bit to be cleared
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @action: the function used to sleep, which may take special actions
- * @mode: the task state to sleep in
- *
- * Use the standard hashed waitqueue table to wait for a bit
- * to be cleared, and allow the waiting action to be specified.
- * This is like wait_on_bit() but allows fine control of how the waiting
- * is done.
- *
- * Returned value will be zero if the bit was cleared, or non-zero
- * if the process received a signal and the mode permitted wakeup
- * on that signal.
- */
-static inline int
-wait_on_bit_action(unsigned long *word, int bit, wait_bit_action_f *action,
- unsigned mode)
-{
- might_sleep();
- if (!test_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit(word, bit, action, mode);
-}
-
-/**
- * wait_on_bit_lock - wait for a bit to be cleared, when wanting to set it
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @mode: the task state to sleep in
- *
- * There is a standard hashed waitqueue table for generic use. This
- * is the part of the hashtable's accessor API that waits on a bit
- * when one intends to set it, for instance, trying to lock bitflags.
- * For instance, if one were to have waiters trying to set bitflag
- * and waiting for it to clear before setting it, one would call
- * wait_on_bit() in threads waiting to be able to set the bit.
- * One uses wait_on_bit_lock() where one is waiting for the bit to
- * clear with the intention of setting it, and when done, clearing it.
- *
- * Returns zero if the bit was (eventually) found to be clear and was
- * set. Returns non-zero if a signal was delivered to the process and
- * the @mode allows that signal to wake the process.
- */
-static inline int
-wait_on_bit_lock(unsigned long *word, int bit, unsigned mode)
-{
- might_sleep();
- if (!test_and_set_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit_lock(word, bit, bit_wait, mode);
-}
-
-/**
- * wait_on_bit_lock_io - wait for a bit to be cleared, when wanting to set it
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @mode: the task state to sleep in
- *
- * Use the standard hashed waitqueue table to wait for a bit
- * to be cleared and then to atomically set it. This is similar
- * to wait_on_bit(), but calls io_schedule() instead of schedule()
- * for the actual waiting.
- *
- * Returns zero if the bit was (eventually) found to be clear and was
- * set. Returns non-zero if a signal was delivered to the process and
- * the @mode allows that signal to wake the process.
- */
-static inline int
-wait_on_bit_lock_io(unsigned long *word, int bit, unsigned mode)
-{
- might_sleep();
- if (!test_and_set_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit_lock(word, bit, bit_wait_io, mode);
-}
-
-/**
- * wait_on_bit_lock_action - wait for a bit to be cleared, when wanting to set it
- * @word: the word being waited on, a kernel virtual address
- * @bit: the bit of the word being waited on
- * @action: the function used to sleep, which may take special actions
- * @mode: the task state to sleep in
- *
- * Use the standard hashed waitqueue table to wait for a bit
- * to be cleared and then to set it, and allow the waiting action
- * to be specified.
- * This is like wait_on_bit() but allows fine control of how the waiting
- * is done.
- *
- * Returns zero if the bit was (eventually) found to be clear and was
- * set. Returns non-zero if a signal was delivered to the process and
- * the @mode allows that signal to wake the process.
- */
-static inline int
-wait_on_bit_lock_action(unsigned long *word, int bit, wait_bit_action_f *action,
- unsigned mode)
-{
- might_sleep();
- if (!test_and_set_bit(bit, word))
- return 0;
- return out_of_line_wait_on_bit_lock(word, bit, action, mode);
-}
-
-/**
- * wait_on_atomic_t - Wait for an atomic_t to become 0
- * @val: The atomic value being waited on, a kernel virtual address
- * @action: the function used to sleep, which may take special actions
- * @mode: the task state to sleep in
- *
- * Wait for an atomic_t to become 0. We abuse the bit-wait waitqueue table for
- * the purpose of getting a waitqueue, but we set the key to a bit number
- * outside of the target 'word'.
- */
-static inline
-int wait_on_atomic_t(atomic_t *val, int (*action)(atomic_t *), unsigned mode)
-{
- might_sleep();
- if (atomic_read(val) == 0)
- return 0;
- return out_of_line_wait_on_atomic_t(val, action, mode);
-}
-
#endif /* _LINUX_WAIT_H */
projects / karo-tx-linux.git / blobdiff