Differential D35051 Diff 105383 sys/compat/linuxkpi/common/include/linux/kthread.h

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sys/compat/linuxkpi/common/include/linux/kthread.h

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	*			*
	* $FreeBSD$			* $FreeBSD$
	*/			*/
	#ifndef _LINUXKPI_LINUX_KTHREAD_H_			#ifndef _LINUXKPI_LINUX_KTHREAD_H_
	#define _LINUXKPI_LINUX_KTHREAD_H_			#define _LINUXKPI_LINUX_KTHREAD_H_

	#include <linux/sched.h>			#include <linux/sched.h>

	#include <sys/unistd.h>			#include <sys/param.h>
				#include <sys/kernel.h>
	#include <sys/kthread.h>			#include <sys/kthread.h>
				#include <sys/malloc.h>
				#include <sys/queue.h>
				#include <sys/taskqueue.h>
				#include <sys/unistd.h>

				struct task_struct;
				struct kthread_work;

				typedef void (kthread_work_func_t)(struct kthread_work work);

				struct kthread_worker {
				struct task_struct *task;
				struct taskqueue *tq;
				};

				struct kthread_work {
				struct taskqueue *tq;
				struct task task;
				kthread_work_func_t func;
				};

	#define kthread_run(fn, data, fmt, ...) ({ \			#define kthread_run(fn, data, fmt, ...) ({ \
	struct task_struct *__task; \			struct task_struct *__task; \
	struct thread *__td; \			struct thread *__td; \
	\			\
	if (kthread_add(linux_kthread_fn, NULL, NULL, &__td, \			if (kthread_add(linux_kthread_fn, NULL, NULL, &__td, \
	RFSTOPPED, 0, fmt, ## __VA_ARGS__)) \			RFSTOPPED, 0, fmt, ## __VA_ARGS__)) \
	__task = NULL; \			__task = NULL; \
	else \			else \
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	#define kthread_should_stop() linux_kthread_should_stop()			#define kthread_should_stop() linux_kthread_should_stop()
	#define kthread_should_stop_task(task) linux_kthread_should_stop_task(task)			#define kthread_should_stop_task(task) linux_kthread_should_stop_task(task)
	#define kthread_park(task) linux_kthread_park(task)			#define kthread_park(task) linux_kthread_park(task)
	#define kthread_parkme() linux_kthread_parkme()			#define kthread_parkme() linux_kthread_parkme()
	#define kthread_should_park() linux_kthread_should_park()			#define kthread_should_park() linux_kthread_should_park()
	#define kthread_unpark(task) linux_kthread_unpark(task)			#define kthread_unpark(task) linux_kthread_unpark(task)

	#define in_atomic() linux_in_atomic()			#define in_atomic() linux_in_atomic()

				/* Only kthread_(create\|destroy)_worker interface is allowed */
				#define kthread_init_worker(worker) \
				_Static_assert(false, "pre-4.9 worker interface is not supported");

				task_fn_t lkpi_kthread_work_fn;
				task_fn_t lkpi_kthread_worker_init_fn;

				#define kthread_create_worker(flags, fmt, ...) ({ \
				struct kthread_worker *__w; \
				struct task __task; \
				\
				__w = malloc(sizeof(*__w), M_KMALLOC, M_WAITOK \| M_ZERO); \
				__w->tq = taskqueue_create("lkpi kthread taskq", M_WAITOK, \
				taskqueue_thread_enqueue, &__w->tq); \
				taskqueue_start_threads(&__w->tq, 1, PWAIT, fmt, ##__VA_ARGS__);\
				TASK_INIT(&__task, 0, lkpi_kthread_worker_init_fn, __w); \
				taskqueue_enqueue(__w->tq, &__task); \
				taskqueue_drain(__w->tq, &__task); \
				__w; \
				})

				static inline void
				kthread_destroy_worker(struct kthread_worker *worker)
				{
				taskqueue_drain_all(worker->tq);
				taskqueue_free(worker->tq);
				free(worker, M_KMALLOC);
				}

				static inline void
				kthread_init_work(struct kthread_work *work, kthread_work_func_t func)
				{
				work->tq = NULL;
				work->func = func;
				TASK_INIT(&work->task, 0, lkpi_kthread_work_fn, work);
				}

				static inline bool
				kthread_queue_work(struct kthread_worker worker, struct kthread_work work)
				{
				int error;

				error = taskqueue_enqueue_flags(worker->tq, &work->task,
				TQFLG_FAILIF_CANCELING \| TQFLG_FAILIF_PENDING);
				if (error == 0)
				work->tq = worker->tq;
				return (error == 0);
				}

				static inline bool
				kthread_cancel_work_sync(struct kthread_work *work)
				{
				u_int pending = 0;

				if (work->tq != NULL &&
				taskqueue_cancel(work->tq, &work->task, &pending) != 0)
				taskqueue_drain(work->tq, &work->task);

				return (pending != 0);
				}

				static inline void
				kthread_flush_work(struct kthread_work *work)
				{
				if (work->tq != NULL)
				taskqueue_drain(work->tq, &work->task);
				}

				static inline void
				kthread_flush_worker(struct kthread_worker *worker)
				{
				taskqueue_drain_all(worker->tq);
				}

	#endif /* _LINUXKPI_LINUX_KTHREAD_H_ */			#endif /* _LINUXKPI_LINUX_KTHREAD_H_ */