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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-06-27 11:31:24 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-22 23:57:57 +0400 |
| commit | ed3e694d78cc75fa79bf29698631b146fd27aa35 (patch) | |
| tree | 97dad6768546b489a3d09c42cef0738b57f4822e /kernel/task_work.c | |
| parent | 67d1214551e800f9fe7dc7c47a346d2df0fafed5 (diff) | |
| download | linux-ed3e694d78cc75fa79bf29698631b146fd27aa35.tar.xz | |
move exit_task_work() past exit_files() et.al.
... and get rid of PF_EXITING check in task_work_add().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel/task_work.c')
| -rw-r--r-- | kernel/task_work.c | 30 |
1 files changed, 11 insertions, 19 deletions
diff --git a/kernel/task_work.c b/kernel/task_work.c index 76266fb665dc..fb396089f66a 100644 --- a/kernel/task_work.c +++ b/kernel/task_work.c @@ -5,34 +5,26 @@ int task_work_add(struct task_struct *task, struct callback_head *twork, bool notify) { + struct callback_head *last, *first; unsigned long flags; - int err = -ESRCH; -#ifndef TIF_NOTIFY_RESUME - if (notify) - return -ENOTSUPP; -#endif /* - * We must not insert the new work if the task has already passed - * exit_task_work(). We rely on do_exit()->raw_spin_unlock_wait() - * and check PF_EXITING under pi_lock. + * Not inserting the new work if the task has already passed + * exit_task_work() is the responisbility of callers. */ raw_spin_lock_irqsave(&task->pi_lock, flags); - if (likely(!(task->flags & PF_EXITING))) { - struct callback_head *last = task->task_works; - struct callback_head *first = last ? last->next : twork; - twork->next = first; - if (last) - last->next = twork; - task->task_works = twork; - err = 0; - } + last = task->task_works; + first = last ? last->next : twork; + twork->next = first; + if (last) + last->next = twork; + task->task_works = twork; raw_spin_unlock_irqrestore(&task->pi_lock, flags); /* test_and_set_bit() implies mb(), see tracehook_notify_resume(). */ - if (likely(!err) && notify) + if (notify) set_notify_resume(task); - return err; + return 0; } struct callback_head * |