Andrew Morton <[email protected]> wrote:
>
> Oleg Nesterov <[email protected]> wrote:
> >
> > - if (likely(p->tasks.prev != LIST_POISON2))
> > + if (likely(p->tasks.prev != LIST_POISON2)) {
>
> argh.
>
> c'mon guys, we can't put a dependency on list_head poisoning into generic
> code.
>
A suitable fix might be to add a new list_del_poison() (or
list_del_rcu_something()?) and use that everywhere.
But it should use a different poisoning pattern, so we know that the kernel
will still work correctly when someone removes the list_head debugging.
-
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