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SubjectRe: [PATCH 3/3] signal: do_sigtimedwait() needs retarget_shared_pending()
On 04/25, Tejun Heo wrote:
>
> > @@ -2322,7 +2327,8 @@ int do_sigtimedwait(sigset_t *these, sig
> > /*
> > * None ready -- temporarily unblock those we're
> > * interested while we are sleeping in so that we'll
> > - * be awakened when they arrive.
> > + * be awakened when they arrive. Unblocking is always
> > + * fine, we can avoid set_current_blocked().
> > */
> > tsk->real_blocked = tsk->blocked;
> > sigandsets(&tsk->blocked, &tsk->blocked, these);
>
> Maybe it would be a good idea to introduce a new helper which checks /
> enforces that the operation indeed is only unblocking?

I hope nobody will change ->blocked directly, except this function
and force_sig_info(). And daemonize/allow_signal/disallow_signal, but
there are special and probably we can already kill this deprecated
block/unblock code and forbid kernel_thread(CLONE_SIGHAND) + daemonize().
In fact I think daemonize() should go away.

So, I don't really think we need another helper to unblock something.

> Also, it can
> be a pure preference but I think _locked suffix is better / more
> common for APIs which expect the caller to be responsible for locking.

Again, I can rename... Cough, but in this case please simply suggest
another name. set_tsk_blocked_locked?

Oleg.



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