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https://github.com/torvalds/linux.git
synced 2026-10-07 22:37:45 -04:00
Oleg Nesterov
e91b481623
So that the target task will exit the wait_event_interruptible-like loop and call task_work_run() asap. The patch turns "bool notify" into 0,TWA_RESUME,TWA_SIGNAL enum, the new TWA_SIGNAL flag implies signal_wake_up(). However, it needs to avoid the race with recalc_sigpending(), so the patch also adds the new JOBCTL_TASK_WORK bit included in JOBCTL_PENDING_MASK. TODO: once this patch is merged we need to change all current users of task_work_add(notify = true) to use TWA_RESUME. Cc: [email protected] # v5.7 Acked-by: Peter Zijlstra (Intel) <[email protected]> Signed-off-by: Oleg Nesterov <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
29 lines
659 B
C
29 lines
659 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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#define TWA_RESUME 1
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#define TWA_SIGNAL 2
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int task_work_add(struct task_struct *task, struct callback_head *twork, int);
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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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