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deal with task_work callbacks adding more work

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It doesn't matter on normal return to userland path (we'll recheck the
NOTIFY_RESUME flag anyway), but in case of exit_task_work() we'll
need that as soon as we get callbacks capable of triggering more
task_work_add().

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-27 11:33:29 +04:00
parent ed3e694d78
commit a2d4c71d15
1 changed files with 14 additions and 12 deletions
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2
kernel/task_work.c
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@ -60,6 +60,7 @@ void task_work_run(void)
struct task_struct *task = current;
struct callback_head *p, *q;
while (1) {
raw_spin_lock_irq(&task->pi_lock);
p = task->task_works;
task->task_works = NULL;
@ -75,4 +76,5 @@ void task_work_run(void)
q->func(q);
q = p;
}
}
}