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c7aab1a7c5
The only exported helper we have right now is task_work_cancel(), which cancels any task_work from a given task where func matches the queued work item. This is a bit too coarse for some use cases. Add a task_work_cancel_match() that allows to more specifically target individual work items outside of purely the callback function used. task_work_cancel() can be trivially implemented on top of that, hence do so. Reviewed-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
35 lines
854 B
C
35 lines
854 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_TASK_WORK_H
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#define _LINUX_TASK_WORK_H
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#include <linux/list.h>
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#include <linux/sched.h>
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typedef void (*task_work_func_t)(struct callback_head *);
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static inline void
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init_task_work(struct callback_head *twork, task_work_func_t func)
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{
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twork->func = func;
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}
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enum task_work_notify_mode {
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TWA_NONE,
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TWA_RESUME,
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TWA_SIGNAL,
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};
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int task_work_add(struct task_struct *task, struct callback_head *twork,
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enum task_work_notify_mode mode);
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struct callback_head *task_work_cancel_match(struct task_struct *task,
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bool (*match)(struct callback_head *, void *data), void *data);
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struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
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void task_work_run(void);
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static inline void exit_task_work(struct task_struct *task)
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{
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task_work_run();
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}
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#endif /* _LINUX_TASK_WORK_H */
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