mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-04 09:59:32 +00:00
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: stable@vger.kernel.org # v5.7 Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
28 lines
659 B
C
28 lines
659 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_TASK_WORK_H
|
|
#define _LINUX_TASK_WORK_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/sched.h>
|
|
|
|
typedef void (*task_work_func_t)(struct callback_head *);
|
|
|
|
static inline void
|
|
init_task_work(struct callback_head *twork, task_work_func_t func)
|
|
{
|
|
twork->func = func;
|
|
}
|
|
|
|
#define TWA_RESUME 1
|
|
#define TWA_SIGNAL 2
|
|
int task_work_add(struct task_struct *task, struct callback_head *twork, int);
|
|
|
|
struct callback_head *task_work_cancel(struct task_struct *, task_work_func_t);
|
|
void task_work_run(void);
|
|
|
|
static inline void exit_task_work(struct task_struct *task)
|
|
{
|
|
task_work_run();
|
|
}
|
|
|
|
#endif /* _LINUX_TASK_WORK_H */
|