diff --git a/sys/compat/linuxkpi/common/include/linux/wait.h b/sys/compat/linuxkpi/common/include/linux/wait.h index ea24b7344539..70ba962e957d 100644 --- a/sys/compat/linuxkpi/common/include/linux/wait.h +++ b/sys/compat/linuxkpi/common/include/linux/wait.h @@ -1,301 +1,310 @@ /*- * Copyright (c) 2010 Isilon Systems, Inc. * Copyright (c) 2010 iX Systems, Inc. * Copyright (c) 2010 Panasas, Inc. * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. * Copyright (c) 2017 Mark Johnston * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice unmodified, this list of conditions, and the following * disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _LINUX_WAIT_H_ #define _LINUX_WAIT_H_ #include #include #include #include #include #include #define SKIP_SLEEP() (SCHEDULER_STOPPED() || kdb_active) #define might_sleep() \ WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "might_sleep()") #define might_sleep_if(cond) do { \ if (cond) { might_sleep(); } \ } while (0) struct wait_queue; struct wait_queue_head; +#define wait_queue_entry wait_queue + typedef struct wait_queue wait_queue_t; +typedef struct wait_queue_entry wait_queue_entry_t; typedef struct wait_queue_head wait_queue_head_t; typedef int wait_queue_func_t(wait_queue_t *, unsigned int, int, void *); /* * Many API consumers directly reference these fields and those of * wait_queue_head. */ struct wait_queue { unsigned int flags; /* always 0 */ void *private; wait_queue_func_t *func; union { struct list_head task_list; /* < v4.13 */ struct list_head entry; /* >= v4.13 */ }; }; struct wait_queue_head { spinlock_t lock; union { struct list_head task_list; /* < v4.13 */ struct list_head head; /* >= v4.13 */ }; }; /* * This function is referenced by at least one DRM driver, so it may not be * renamed and furthermore must be the default wait queue callback. */ extern wait_queue_func_t autoremove_wake_function; extern wait_queue_func_t default_wake_function; #define DEFINE_WAIT_FUNC(name, function) \ wait_queue_t name = { \ .private = current, \ .func = function, \ .task_list = LINUX_LIST_HEAD_INIT(name.task_list) \ } #define DEFINE_WAIT(name) \ DEFINE_WAIT_FUNC(name, autoremove_wake_function) #define DECLARE_WAITQUEUE(name, task) \ wait_queue_t name = { \ .private = task, \ .task_list = LINUX_LIST_HEAD_INIT(name.task_list) \ } #define DECLARE_WAIT_QUEUE_HEAD(name) \ wait_queue_head_t name = { \ .task_list = LINUX_LIST_HEAD_INIT(name.task_list), \ }; \ MTX_SYSINIT(name, &(name).lock.m, spin_lock_name("wqhead"), MTX_DEF) #define init_waitqueue_head(wqh) do { \ mtx_init(&(wqh)->lock.m, spin_lock_name("wqhead"), \ NULL, MTX_DEF | MTX_NEW | MTX_NOWITNESS); \ INIT_LIST_HEAD(&(wqh)->task_list); \ } while (0) void linux_init_wait_entry(wait_queue_t *, int); void linux_wake_up(wait_queue_head_t *, unsigned int, int, bool); #define init_wait_entry(wq, flags) \ linux_init_wait_entry(wq, flags) #define wake_up(wqh) \ linux_wake_up(wqh, TASK_NORMAL, 1, false) #define wake_up_all(wqh) \ linux_wake_up(wqh, TASK_NORMAL, 0, false) #define wake_up_locked(wqh) \ linux_wake_up(wqh, TASK_NORMAL, 1, true) #define wake_up_all_locked(wqh) \ linux_wake_up(wqh, TASK_NORMAL, 0, true) #define wake_up_interruptible(wqh) \ linux_wake_up(wqh, TASK_INTERRUPTIBLE, 1, false) #define wake_up_interruptible_all(wqh) \ linux_wake_up(wqh, TASK_INTERRUPTIBLE, 0, false) int linux_wait_event_common(wait_queue_head_t *, wait_queue_t *, int, unsigned int, spinlock_t *); /* * Returns -ERESTARTSYS for a signal, 0 if cond is false after timeout, 1 if * cond is true after timeout, remaining jiffies (> 0) if cond is true before * timeout. */ #define __wait_event_common(wqh, cond, timeout, state, lock) ({ \ DEFINE_WAIT(__wq); \ const int __timeout = ((int)(timeout)) < 1 ? 1 : (timeout); \ int __start = ticks; \ int __ret = 0; \ \ for (;;) { \ linux_prepare_to_wait(&(wqh), &__wq, state); \ if (cond) \ break; \ __ret = linux_wait_event_common(&(wqh), &__wq, \ __timeout, state, lock); \ if (__ret != 0) \ break; \ } \ linux_finish_wait(&(wqh), &__wq); \ if (__timeout != MAX_SCHEDULE_TIMEOUT) { \ if (__ret == -EWOULDBLOCK) \ __ret = !!(cond); \ else if (__ret != -ERESTARTSYS) { \ __ret = __timeout + __start - ticks; \ /* range check return value */ \ if (__ret < 1) \ __ret = 1; \ else if (__ret > __timeout) \ __ret = __timeout; \ } \ } \ __ret; \ }) #define wait_event(wqh, cond) do { \ (void) __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_UNINTERRUPTIBLE, NULL); \ } while (0) #define wait_event_timeout(wqh, cond, timeout) ({ \ __wait_event_common(wqh, cond, timeout, TASK_UNINTERRUPTIBLE, \ NULL); \ }) #define wait_event_killable(wqh, cond) ({ \ __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_INTERRUPTIBLE, NULL); \ }) #define wait_event_interruptible(wqh, cond) ({ \ __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_INTERRUPTIBLE, NULL); \ }) #define wait_event_interruptible_timeout(wqh, cond, timeout) ({ \ __wait_event_common(wqh, cond, timeout, TASK_INTERRUPTIBLE, \ NULL); \ }) /* * Wait queue is already locked. */ #define wait_event_interruptible_locked(wqh, cond) ({ \ int __ret; \ \ spin_unlock(&(wqh).lock); \ __ret = __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_INTERRUPTIBLE, NULL); \ spin_lock(&(wqh).lock); \ __ret; \ }) /* * The passed spinlock is held when testing the condition. */ #define wait_event_interruptible_lock_irq(wqh, cond, lock) ({ \ __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_INTERRUPTIBLE, &(lock)); \ }) /* * The passed spinlock is held when testing the condition. */ #define wait_event_lock_irq(wqh, cond, lock) ({ \ __wait_event_common(wqh, cond, MAX_SCHEDULE_TIMEOUT, \ TASK_UNINTERRUPTIBLE, &(lock)); \ }) static inline void __add_wait_queue(wait_queue_head_t *wqh, wait_queue_t *wq) { list_add(&wq->task_list, &wqh->task_list); } static inline void add_wait_queue(wait_queue_head_t *wqh, wait_queue_t *wq) { spin_lock(&wqh->lock); __add_wait_queue(wqh, wq); spin_unlock(&wqh->lock); } static inline void __add_wait_queue_tail(wait_queue_head_t *wqh, wait_queue_t *wq) { list_add_tail(&wq->task_list, &wqh->task_list); } +static inline void +__add_wait_queue_entry_tail(wait_queue_head_t *wqh, wait_queue_entry_t *wq) +{ + list_add_tail(&wq->entry, &wqh->head); +} + static inline void __remove_wait_queue(wait_queue_head_t *wqh, wait_queue_t *wq) { list_del(&wq->task_list); } static inline void remove_wait_queue(wait_queue_head_t *wqh, wait_queue_t *wq) { spin_lock(&wqh->lock); __remove_wait_queue(wqh, wq); spin_unlock(&wqh->lock); } bool linux_waitqueue_active(wait_queue_head_t *); #define waitqueue_active(wqh) linux_waitqueue_active(wqh) void linux_prepare_to_wait(wait_queue_head_t *, wait_queue_t *, int); void linux_finish_wait(wait_queue_head_t *, wait_queue_t *); #define prepare_to_wait(wqh, wq, state) linux_prepare_to_wait(wqh, wq, state) #define finish_wait(wqh, wq) linux_finish_wait(wqh, wq) void linux_wake_up_bit(void *, int); int linux_wait_on_bit_timeout(unsigned long *, int, unsigned int, int); void linux_wake_up_atomic_t(atomic_t *); int linux_wait_on_atomic_t(atomic_t *, unsigned int); #define wake_up_bit(word, bit) linux_wake_up_bit(word, bit) #define wait_on_bit(word, bit, state) \ linux_wait_on_bit_timeout(word, bit, state, MAX_SCHEDULE_TIMEOUT) #define wait_on_bit_timeout(word, bit, state, timeout) \ linux_wait_on_bit_timeout(word, bit, state, timeout) #define wake_up_atomic_t(a) linux_wake_up_atomic_t(a) /* * All existing callers have a cb that just schedule()s. To avoid adding * complexity, just emulate that internally. The prototype is different so that * callers must be manually modified; a cb that does something other than call * schedule() will require special treatment. */ #define wait_on_atomic_t(a, state) linux_wait_on_atomic_t(a, state) struct task_struct; bool linux_wake_up_state(struct task_struct *, unsigned int); #define wake_up_process(task) linux_wake_up_state(task, TASK_NORMAL) #define wake_up_state(task, state) linux_wake_up_state(task, state) #endif /* _LINUX_WAIT_H_ */