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@@ -10,38 +10,30 @@
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#include <asm/current.h>
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#include <uapi/linux/wait.h>
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-typedef struct __wait_queue wait_queue_t;
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-typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key);
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-int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key);
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+typedef struct wait_queue_entry wait_queue_entry_t;
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-/* __wait_queue::flags */
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+typedef int (*wait_queue_func_t)(struct wait_queue_entry *wq_entry, unsigned mode, int flags, void *key);
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+int default_wake_function(struct wait_queue_entry *wq_entry, unsigned mode, int flags, void *key);
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+
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+/* wait_queue_entry::flags */
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#define WQ_FLAG_EXCLUSIVE 0x01
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#define WQ_FLAG_WOKEN 0x02
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-struct __wait_queue {
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+/*
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+ * A single wait-queue entry structure:
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+ */
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+struct wait_queue_entry {
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unsigned int flags;
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void *private;
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wait_queue_func_t func;
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- struct list_head task_list;
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-};
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-
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-struct wait_bit_key {
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- void *flags;
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- int bit_nr;
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-#define WAIT_ATOMIC_T_BIT_NR -1
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- unsigned long timeout;
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+ struct list_head entry;
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};
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-struct wait_bit_queue {
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- struct wait_bit_key key;
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- wait_queue_t wait;
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-};
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-
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-struct __wait_queue_head {
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+struct wait_queue_head {
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spinlock_t lock;
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- struct list_head task_list;
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+ struct list_head head;
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};
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-typedef struct __wait_queue_head wait_queue_head_t;
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+typedef struct wait_queue_head wait_queue_head_t;
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struct task_struct;
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@@ -49,82 +41,76 @@ struct task_struct;
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* Macros for declaration and initialisaton of the datatypes
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*/
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-#define __WAITQUEUE_INITIALIZER(name, tsk) { \
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- .private = tsk, \
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- .func = default_wake_function, \
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- .task_list = { NULL, NULL } }
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+#define __WAITQUEUE_INITIALIZER(name, tsk) { \
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+ .private = tsk, \
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+ .func = default_wake_function, \
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+ .entry = { NULL, NULL } }
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-#define DECLARE_WAITQUEUE(name, tsk) \
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- wait_queue_t name = __WAITQUEUE_INITIALIZER(name, tsk)
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+#define DECLARE_WAITQUEUE(name, tsk) \
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+ struct wait_queue_entry name = __WAITQUEUE_INITIALIZER(name, tsk)
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-#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
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- .lock = __SPIN_LOCK_UNLOCKED(name.lock), \
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- .task_list = { &(name).task_list, &(name).task_list } }
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+#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
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+ .lock = __SPIN_LOCK_UNLOCKED(name.lock), \
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+ .head = { &(name).head, &(name).head } }
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#define DECLARE_WAIT_QUEUE_HEAD(name) \
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- wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
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-
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-#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \
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- { .flags = word, .bit_nr = bit, }
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+ struct wait_queue_head name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
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-#define __WAIT_ATOMIC_T_KEY_INITIALIZER(p) \
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- { .flags = p, .bit_nr = WAIT_ATOMIC_T_BIT_NR, }
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+extern void __init_waitqueue_head(struct wait_queue_head *wq_head, const char *name, struct lock_class_key *);
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-extern void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *);
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-
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-#define init_waitqueue_head(q) \
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- do { \
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- static struct lock_class_key __key; \
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- \
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- __init_waitqueue_head((q), #q, &__key); \
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+#define init_waitqueue_head(wq_head) \
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+ do { \
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+ static struct lock_class_key __key; \
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+ \
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+ __init_waitqueue_head((wq_head), #wq_head, &__key); \
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} while (0)
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#ifdef CONFIG_LOCKDEP
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# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \
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({ init_waitqueue_head(&name); name; })
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# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \
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- wait_queue_head_t name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
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+ struct wait_queue_head name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
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#else
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# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name)
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#endif
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-static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p)
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+static inline void init_waitqueue_entry(struct wait_queue_entry *wq_entry, struct task_struct *p)
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{
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- q->flags = 0;
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- q->private = p;
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- q->func = default_wake_function;
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+ wq_entry->flags = 0;
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+ wq_entry->private = p;
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+ wq_entry->func = default_wake_function;
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}
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static inline void
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-init_waitqueue_func_entry(wait_queue_t *q, wait_queue_func_t func)
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+init_waitqueue_func_entry(struct wait_queue_entry *wq_entry, wait_queue_func_t func)
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{
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- q->flags = 0;
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- q->private = NULL;
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- q->func = func;
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+ wq_entry->flags = 0;
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+ wq_entry->private = NULL;
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+ wq_entry->func = func;
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}
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/**
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* waitqueue_active -- locklessly test for waiters on the queue
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- * @q: the waitqueue to test for waiters
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+ * @wq_head: the waitqueue to test for waiters
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*
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* returns true if the wait list is not empty
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*
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* NOTE: this function is lockless and requires care, incorrect usage _will_
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* lead to sporadic and non-obvious failure.
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*
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- * Use either while holding wait_queue_head_t::lock or when used for wakeups
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+ * Use either while holding wait_queue_head::lock or when used for wakeups
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* with an extra smp_mb() like:
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*
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* CPU0 - waker CPU1 - waiter
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*
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* for (;;) {
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- * @cond = true; prepare_to_wait(&wq, &wait, state);
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+ * @cond = true; prepare_to_wait(&wq_head, &wait, state);
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* smp_mb(); // smp_mb() from set_current_state()
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- * if (waitqueue_active(wq)) if (@cond)
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- * wake_up(wq); break;
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+ * if (waitqueue_active(wq_head)) if (@cond)
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+ * wake_up(wq_head); break;
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* schedule();
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* }
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- * finish_wait(&wq, &wait);
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+ * finish_wait(&wq_head, &wait);
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*
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* Because without the explicit smp_mb() it's possible for the
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* waitqueue_active() load to get hoisted over the @cond store such that we'll
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@@ -133,20 +119,20 @@ init_waitqueue_func_entry(wait_queue_t *q, wait_queue_func_t func)
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* Also note that this 'optimization' trades a spin_lock() for an smp_mb(),
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* which (when the lock is uncontended) are of roughly equal cost.
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*/
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-static inline int waitqueue_active(wait_queue_head_t *q)
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+static inline int waitqueue_active(struct wait_queue_head *wq_head)
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{
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- return !list_empty(&q->task_list);
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+ return !list_empty(&wq_head->head);
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}
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/**
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* wq_has_sleeper - check if there are any waiting processes
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- * @wq: wait queue head
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+ * @wq_head: wait queue head
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*
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- * Returns true if wq has waiting processes
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+ * Returns true if wq_head has waiting processes
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*
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* Please refer to the comment for waitqueue_active.
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*/
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-static inline bool wq_has_sleeper(wait_queue_head_t *wq)
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+static inline bool wq_has_sleeper(struct wait_queue_head *wq_head)
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{
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/*
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* We need to be sure we are in sync with the
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@@ -156,63 +142,51 @@ static inline bool wq_has_sleeper(wait_queue_head_t *wq)
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* waiting side.
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*/
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smp_mb();
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- return waitqueue_active(wq);
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+ return waitqueue_active(wq_head);
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}
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-extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
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-extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait);
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-extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
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+extern void add_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
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+extern void add_wait_queue_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
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+extern void remove_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry);
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-static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new)
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+static inline void __add_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
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{
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- list_add(&new->task_list, &head->task_list);
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+ list_add(&wq_entry->entry, &wq_head->head);
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}
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/*
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* Used for wake-one threads:
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*/
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static inline void
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-__add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
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+__add_wait_queue_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
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{
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- wait->flags |= WQ_FLAG_EXCLUSIVE;
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- __add_wait_queue(q, wait);
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+ wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
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+ __add_wait_queue(wq_head, wq_entry);
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}
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-static inline void __add_wait_queue_tail(wait_queue_head_t *head,
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- wait_queue_t *new)
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+static inline void __add_wait_queue_entry_tail(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
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{
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- list_add_tail(&new->task_list, &head->task_list);
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+ list_add_tail(&wq_entry->entry, &wq_head->head);
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}
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static inline void
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-__add_wait_queue_tail_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
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+__add_wait_queue_entry_tail_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
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{
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- wait->flags |= WQ_FLAG_EXCLUSIVE;
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- __add_wait_queue_tail(q, wait);
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+ wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
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+ __add_wait_queue_entry_tail(wq_head, wq_entry);
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}
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static inline void
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-__remove_wait_queue(wait_queue_head_t *head, wait_queue_t *old)
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+__remove_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
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{
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- list_del(&old->task_list);
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+ list_del(&wq_entry->entry);
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}
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-typedef int wait_bit_action_f(struct wait_bit_key *, int mode);
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-void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
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-void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key);
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-void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
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-void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr);
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-void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr);
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-void __wake_up_bit(wait_queue_head_t *, void *, int);
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-int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
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-int __wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
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-void wake_up_bit(void *, int);
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-void wake_up_atomic_t(atomic_t *);
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-int out_of_line_wait_on_bit(void *, int, wait_bit_action_f *, unsigned);
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-int out_of_line_wait_on_bit_timeout(void *, int, wait_bit_action_f *, unsigned, unsigned long);
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-int out_of_line_wait_on_bit_lock(void *, int, wait_bit_action_f *, unsigned);
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-int out_of_line_wait_on_atomic_t(atomic_t *, int (*)(atomic_t *), unsigned);
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-wait_queue_head_t *bit_waitqueue(void *, int);
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+void __wake_up(struct wait_queue_head *wq_head, unsigned int mode, int nr, void *key);
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+void __wake_up_locked_key(struct wait_queue_head *wq_head, unsigned int mode, void *key);
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+void __wake_up_sync_key(struct wait_queue_head *wq_head, unsigned int mode, int nr, void *key);
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+void __wake_up_locked(struct wait_queue_head *wq_head, unsigned int mode, int nr);
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+void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode, int nr);
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#define wake_up(x) __wake_up(x, TASK_NORMAL, 1, NULL)
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#define wake_up_nr(x, nr) __wake_up(x, TASK_NORMAL, nr, NULL)
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@@ -228,28 +202,28 @@ wait_queue_head_t *bit_waitqueue(void *, int);
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/*
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* Wakeup macros to be used to report events to the targets.
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*/
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-#define wake_up_poll(x, m) \
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+#define wake_up_poll(x, m) \
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__wake_up(x, TASK_NORMAL, 1, (void *) (m))
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-#define wake_up_locked_poll(x, m) \
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+#define wake_up_locked_poll(x, m) \
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__wake_up_locked_key((x), TASK_NORMAL, (void *) (m))
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-#define wake_up_interruptible_poll(x, m) \
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+#define wake_up_interruptible_poll(x, m) \
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__wake_up(x, TASK_INTERRUPTIBLE, 1, (void *) (m))
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-#define wake_up_interruptible_sync_poll(x, m) \
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+#define wake_up_interruptible_sync_poll(x, m) \
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__wake_up_sync_key((x), TASK_INTERRUPTIBLE, 1, (void *) (m))
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-#define ___wait_cond_timeout(condition) \
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-({ \
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- bool __cond = (condition); \
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- if (__cond && !__ret) \
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- __ret = 1; \
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- __cond || !__ret; \
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+#define ___wait_cond_timeout(condition) \
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+({ \
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+ bool __cond = (condition); \
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+ if (__cond && !__ret) \
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+ __ret = 1; \
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+ __cond || !__ret; \
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})
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-#define ___wait_is_interruptible(state) \
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- (!__builtin_constant_p(state) || \
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- state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE) \
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+#define ___wait_is_interruptible(state) \
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+ (!__builtin_constant_p(state) || \
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+ state == TASK_INTERRUPTIBLE || state == TASK_KILLABLE) \
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-extern void init_wait_entry(wait_queue_t *__wait, int flags);
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+extern void init_wait_entry(struct wait_queue_entry *wq_entry, int flags);
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/*
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* The below macro ___wait_event() has an explicit shadow of the __ret
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@@ -263,108 +237,108 @@ extern void init_wait_entry(wait_queue_t *__wait, int flags);
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* otherwise.
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*/
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-#define ___wait_event(wq, condition, state, exclusive, ret, cmd) \
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-({ \
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- __label__ __out; \
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- wait_queue_t __wait; \
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- long __ret = ret; /* explicit shadow */ \
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- \
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- init_wait_entry(&__wait, exclusive ? WQ_FLAG_EXCLUSIVE : 0); \
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- for (;;) { \
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- long __int = prepare_to_wait_event(&wq, &__wait, state);\
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- \
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- if (condition) \
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- break; \
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- \
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- if (___wait_is_interruptible(state) && __int) { \
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- __ret = __int; \
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- goto __out; \
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- } \
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- \
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- cmd; \
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- } \
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- finish_wait(&wq, &__wait); \
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-__out: __ret; \
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+#define ___wait_event(wq_head, condition, state, exclusive, ret, cmd) \
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+({ \
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+ __label__ __out; \
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+ struct wait_queue_entry __wq_entry; \
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+ 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.
|
|
|
@@ -375,83 +349,83 @@ do { \
|
|
|
* 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.
|
|
|
@@ -459,29 +433,29 @@ do { \
|
|
|
* 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.
|
|
|
@@ -493,50 +467,49 @@ do { \
|
|
|
* 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.
|
|
|
@@ -544,25 +517,25 @@ do { \
|
|
|
* 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.
|
|
|
@@ -570,73 +543,73 @@ do { \
|
|
|
* 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; \
|
|
|
})
|
|
|
|
|
|
|
|
|
@@ -663,8 +636,8 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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))
|
|
|
|
|
|
/**
|
|
|
@@ -690,8 +663,8 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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))
|
|
|
|
|
|
/**
|
|
|
@@ -721,8 +694,8 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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))
|
|
|
|
|
|
/**
|
|
|
@@ -752,12 +725,12 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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())
|
|
|
|
|
|
/**
|
|
|
@@ -775,21 +748,21 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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))
|
|
|
|
|
|
/**
|
|
|
@@ -797,7 +770,7 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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.
|
|
|
@@ -806,7 +779,7 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
*
|
|
|
* 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.
|
|
|
@@ -815,11 +788,11 @@ extern int do_wait_intr_irq(wait_queue_head_t *, wait_queue_t *);
|
|
|
* 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)
|
|
|
|
|
|
/**
|
|
|
@@ -827,14 +800,14 @@ do { \
|
|
|
* 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.
|
|
|
@@ -842,26 +815,26 @@ do { \
|
|
|
* 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.
|
|
|
@@ -870,7 +843,7 @@ do { \
|
|
|
*
|
|
|
* 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.
|
|
|
@@ -882,27 +855,27 @@ do { \
|
|
|
* 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.
|
|
|
@@ -913,28 +886,28 @@ do { \
|
|
|
* 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.
|
|
|
@@ -942,7 +915,7 @@ do { \
|
|
|
*
|
|
|
* 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.
|
|
|
@@ -954,263 +927,42 @@ do { \
|
|
|
* 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 */
|
Linus Torvalds