On 08/20, Peter Zijlstra wrote:
>
> task_work_cancel(struct task_struct *task, task_work_func_t func)
> {
> ...
> +
> +again:
> + workp = &task->task_works;
> + work = *workp;
> + while (work) {
> + if (work->func == func) {
But this all can race with task_work_run() if task != current.
This "work" can be freed/reused. And it should only return !NULL
if twork->func() was not called.
Oleg.
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