Re: [PATCH v2 1/1] headers: fix circular dependency between linux/sched.h and linux/wait.h

[Oleg Nesterov <oleg@redhat.com>]

On 02/21, Oleg Nesterov wrote:
>
> On 02/21, Peter Zijlstra wrote:
> >
> > afaict its needed because struct signal_struct and struct sighand_struct
> > include a wait_queue_head_t. The inclusion seems to come through
> > completion.h, but afaict we don't actually need to include completion.h
> > because all we have is a pointer to a completion, which is perfectly
> > fine with an incomplete type.
> >
> > This all would suggest we move the signal bits into their own header
> > (include/linux/signal.h already exists and seems inviting).
>
> Agreed, sched.h contatins a lot of garbage, including the signal bits.
>
> As for signal_struct in particular I am not really sure, it is just
> misnamed. It is in fact "struct process" or "struct thread_group". But
> dequeue_signal/etc should go into signal.h.
>
> The only problem, it is not clear how to test such a change.

Ah. sched.h includes signal.h, the testing is not the problem.

So, we can (at least) safely move some declarations.

Oleg.